Ok,
this kernel is a winner.
Just to show how _much_ of a winner it is, it's been awarded a coveted
"weasel" series name, which should tell you just how good it's going to
be. It's a name revered in Linux kernel history, and as such this brings
back the good old days where if you find a bug, you're almost certainly
simply mistaken, and you probably just did something wrong.
But hey, you can try to prove me wrong. I dare you.
The full shortlog is appended, but instead of a diffstat, I'm doing the my
git "dirstat" output which gives a nicer high-level view. This was
generated with
git diff --cumulative --dirstat=2 --shortstat v2.6.25-rc1..v2.6.25-rc2
and actually gives a pretty good overview. In particular, it shows that
almost exactly half of the updates are to drivers, with network drivers
alone being a third of the whole patch. And of the remaining half, about
half was architecture updates, notably to SH.
What a cool git feature, if I say so myself. It allows me an extra half
hour a week of just sitting back and sipping my foofy tropical drink
(bringing my total up to about 168.5 hours of drunken stupor a week),
since now I don't even have to try to make sense of the diffstat manually
any more. Anyway, here it is:
2.1% Documentation/
3.7% arch/cris/
7.0% arch/sh/configs/
4.4% arch/sh/kernel/
4.9% arch/sh/mm/
17.8% arch/sh/
23.8% arch/
33.5% drivers/net/
6.0% drivers/scsi/lpfc/
7.1% drivers/scsi/
4.5% drivers/sh/maple/
49.5% drivers/
8.1% fs/
2.5% include/linux/
4.5% include/
7.2% kernel/
2.0% net/
509 files changed, 14470 insertions(+), 6986 deletions(-)
which you have to admit looks very managerial, even if you have no clue
what the heck it really contains (which is also very managerial). Now I
just need to turn these reports into some colored powerpoint slides with
pie charts, and then I can turn off my brain _completely_.
But if you actually care for anything but the pretty statistics, here's
the shortlog too. The most interesting part from a core technical side is
probably the "struct path" cleanups that really should have been in -rc1,
but hey, when Andrew slides a bit, I just let him.
But "Quod licet Jovi, non licet bovi", so don't think that applies to
anybody else.
So sh, some driver updates, some VFS cleanups, and a random set of fixups
for all the stuff that happened in -rc1 (and some that happened before).
I'm optimistic that this release cycle won't be anywhere near the pain of
what 24 was, which is why I'm just going to go off for the long weekend
and stay at the beach.
Be nice now. I'll be sipping my Mai Tai. With an umbrella (*).
Linus
(*) But in Oregon, we don't do the small cute paper umbrellas. We do the
big serious ones, to make sure our drinks don't get too watered down!
Ahh, the Oregon beach in February.
---
Adrian Bunk (15):
ide: fix ide/legacy/gayle.c compilation
net/phy/fixed.c: fix a use-after-free
[INET]: Unexport __inet_hash_connect
[INET]: Unexport inet_listen_wlock
[NETFILTER]: make secmark_tg_destroy() static
thinkpad_acpi: static
ACPI: static acpi_no_initrd_override_setup()
ACPI: static acpi_find_dsdt_initrd()
ACPI: static acpi_chain_head
[POWERPC] vdso_do_func_patch{32,64}() must be __init
[POWERPC] free_property() must not be __init
[POWERPC] hvc_rtas_init() must be __init
x86: make dump_pagetable() static
make slub.c:slab_address() static
fix module_update_markers() compile error
Adrian McMenamin (5):
8139too fix for Dreamcast
maple: fix up whitespace damage.
maple: more robust device detection.
maple: Drop unused prototypes from linux/maple.h.
maple: improve detection of attached peripherals
Ahmed S. Darwish (1):
Smack: check for 'struct socket' with NULL sk
Al Viro (3):
wmi: (!x & y) strikes again
dm-raid1 breakage on 64bit
drivers/memstick/host/tifm_ms.c breakage
Alan Cox (5):
ni52: Remove 278 scripts/checkpatch errors
pata_amd: Note in the module description it handles Nvidia
pata_legacy: typo fix
pata_ninja32: setup changes
sh: termios ioctl definitions
Andi Kleen (3):
Prevent IDE boot ops on NUMA system
Make topology fallback macros reference their arguments.
x86: CPA: fix gbpages support in try_preserve_large_page
Ayaz Abdulla (2):
forcedeth: tx collision fix
forcedeth: tx pause watermarks
Balbir Singh (1):
KVM is not seen under X86 config with latest git (32 bit compile)
Bartlomiej Zolnierkiewicz (12):
palm_bk3710: ide_register_hw() -> ide_device_add()
palm_bk3710: fix ide_unregister() usage
palm_bk3710: port initialization/probing bugfix
palm_bk3710: use struct ide_port_info
pdc202xx_old: always enable burst mode
ide: remove stale version number
ide-tape: remove never executed code
bast-ide: build fix
ide-disk: fix flush requests (take 2)
ide: ide_init_port() bugfix
ide: fix comment in init_irq()
ide: remove stale comment from ide-lib.c
Ben Dooks (24):
DM9000: Fix endian-ness of data accesses.
DM9000: Add platform data to specify external phy
DM9000 use dev_xxx() instead of printk for output.
DM9000 update debugging macros to use debug level
DM9000: Pass IRQ flags via platform resources
DM9000: Remove old timer based poll routines
DM9000: Add initial ethtool support
DM9000: Do not sleep with spinlock and IRQs held
DM9000: Use msleep() instead of udelay()
DM9000: Remove barely used SROM array read.
DM9000: Add mutex to protect access
DM9000: Add ethtool support for reading and writing EEPROM
DM9000: Add ethtool control of msg_enable value
DM9000: Remove EEPROM initialisation code.
DM9000: Ensure spinlock held whilst accessing EEPROM registers
DM9000: Remove unnecessary changelog in header comment
DM9000: Use netif_msg to enable debugging options
DM9000: Fix delays used by EEPROM read and write
DM9000: Remove cal_CRC() and use ether_crc_le instead
DM9000: Remove redudant use of "& 0xff"
DM9000: Add platform flag for no attached EEPROM
DM9000: Add support for MII ioctl() calls
DM9000: Update retry count whilst identifying chip
DM9000: Show the MAC address source after printing MAC
Ben Nizette (1):
Include kernel.h from configfs.h
Benjamin Herrenschmidt (2):
cs5520: remove stale comment
e1000: Fix for 32 bits platforms with 64 bits resources
Boaz Harrosh (3):
[SCSI] fas216: Use scsi_eh API for REQUEST_SENSE invocation
[SCSI] aic94xx: fix ABORT_TASK define conflict
[SCSI] gdth: scan for scsi devices
Borislav Petkov (1):
ide-cd: replace ntohs with generic byteorder macro be16_to_cpu
Byron Bradley (1):
sata_mv: platform driver allocs dma without create
Christine Caulfield (1):
MAINTAINERS: update decnet and DLM entries
Christoph Lameter (4):
slub: Determine gfpflags once and not every time a slab is allocated
slub: Fallback to kmalloc_large for failing higher order allocs
slub: Support 4k kmallocs again to compensate for page allocator slowness
dentries: Extract common code to remove dentry from lru
Chuck Lever (1):
NFS: Allow text-based mounts via compat_sys_mount
Cornelia Huck (1):
netiucv: Remember to set driver->owner.
Dan Muntz (1):
NFS: missing spaces in KERN_WARNING
David Brownell (1):
parport: section fixup
David Howells (1):
FRV: Fix up parse error in linker script
David Newall (1):
hci_ldisc: fix null pointer deref
David S. Miller (2):
[IPV4]: Remove IP_TOS setting privilege checks.
[NDISC]: Fix race in generic address resolution
Don Fry (2):
pcnet32: use NET_IP_ALIGN instead of 2
pcnet32: Use print_mac
Eli Cohen (1):
IPoIB: Remove unused struct ipoib_cm_tx.ibwc member
FUJITA Tomonori (1):
[SCSI] advansys: fix overrun_buf aligned bug
Florian Fainelli (4):
r6040: do not use a private stats structure to store statistics
r6040: add helpers to allocate and free the Tx/Rx buffers
r6040: recover from transmit timeout
r6040: cleanups
Geoff Levand (4):
[POWERPC] PS3: Fix bootwrapper hang bug
[POWERPC] PS3: Use system reboot on restart
[POWERPC] PS3: Sys-manager code cleanup
[POWERPC] PS3: Update sys-manager button events
Grant Likely (1):
[POWERPC] Remove unused CONFIG_WANT_DEVICE_TREE
Greg Ungerer (3):
m68knommu: avoid unneccessary use of xchg() in set_mb()
m68knommu: use asflags instead of EXTRA_AFLAGS
m68knommu: use tabs not spaces in cacheflush.h
H. Peter Anvin (1):
timeconst.pl: correct reversal of USEC_TO_HZ and HZ_TO_USEC
Harvey Harrison (7):
x86: pit_clockevent can be static
include/linux: Remove all users of FASTCALL() macro
remove final fastcall users
Final removal of FASTCALL()/fastcall
x86: include proper prototypes for rodata_test
inotify: make variables static in inotify_user.c
kernel-doc: remove fastcall
Herbert Xu (3):
[IPV6]: Fix IPsec datagram fragmentation
[IPSEC]: Fix bogus usage of u64 on input sequence number
[IPV6]: Fix reversed local_df test in ip6_fragment
Hideo Saito (1):
sh: Fix multiple UTLB hit on UP SH-4.
Huang, Ying (1):
x86: EFI runtime code mapping enhancement
Hugh Dickins (1):
[POWERPC] Fix DEBUG_PREEMPT warning when warning
Ingo Molnar (5):
x86: fix sigcontext.h user export
x86: fix "BUG: sleeping function called from invalid context" in print_vma_addr()
x86: EFI set_memory_x()/set_memory_uc() fixes
x86: fix gart_iommu_init()
x86: cpa, fix out of date comment
Ivan Kokshaysky (1):
moduleparam: fix alpha, ia64 and ppc64 compile failures
J. Bruce Fields (2):
nfsd: clean up svc_reserve_auth()
Documentation: prune redundant SubmitChecklist items
Jack Morgenstein (3):
IPoIB: On P_Key change event, reset state properly
IB/mlx4: mlx4_ib_fmr_alloc() should call mlx4_fmr_enable()
mlx4_core: Move table_find from fmr_alloc to fmr_enable
James Bottomley (2):
[SCSI] update SG_ALL to avoid causing chaining
[SCSI] sym53c416: fix module parameters
James Smart (6):
[SCSI] lpfc 8.2.5 : Correct ndlp referencing issues
[SCSI] lpfc 8.2.5 : Miscellaneous Fixes
[SCSI] lpfc 8.2.5 : Add MSI-X single message support
[SCSI] lpfc 8.2.5 : Miscellaneous discovery Fixes
[SCSI] lpfc 8.2.5 : Fix buffer leaks
[SCSI] lpfc 8.2.5 : Update lpfc driver version to 8.2.5
Jan Blunck (19):
Dont touch fs_struct in drivers
Dont touch fs_struct in usermodehelper
Remove path_release_on_umount()
Move struct path into its own header
Embed a struct path into struct nameidata instead of nd->{dentry,mnt}
Introduce path_put()
Use path_put() in a few places instead of {mnt,d}put()
Introduce path_get()
Use struct path in fs_struct
Make set_fs_{root,pwd} take a struct path
One less parameter to __d_path
d_path: kerneldoc cleanup
d_path: Use struct path in struct avc_audit_data
d_path: Make proc_get_link() use a struct path argument
d_path: Make get_dcookie() use a struct path argument
Use struct path in struct svc_export
Use struct path in struct svc_expkey
d_path: Make seq_path() use a struct path argument
d_path: Make d_path() use a struct path
Jan Kara (2):
udf: fix directory offset handling
vfs: add explanation of I_DIRTY_DATASYNC bit
Jarek Poplawski (4):
[AX25] af_ax25: remove sock lock in ax25_info_show()
[AX25] ax25_route: make ax25_route_lock BH safe
[AX25] ax25_timer: use mod_timer instead of add_timer
[AX25] ax25_ds_timer: use mod_timer instead of add_timer
Jeff Layton (6):
NLM: set RPC_CLNT_CREATE_NOPING for NLM RPC clients
NLM: have server-side RPC clients default to soft RPC tasks
NLM: don't reattempt GRANT_MSG when there is already an RPC in flight
NLM: don't requeue block if it was invalidated while GRANT_MSG was in flight
NFS: fix reference counting for NFSv4 callback thread
NFS: remove error field from nfs_readdir_descriptor_t
Jeremy Fitzhardinge (2):
x86/early_ioremap: don't assume we're using swapper_pg_dir
xen: unpin initial Xen pagetable once we're finished with it
Jeremy Roberson (1):
HID: Blacklist new GTCO CalComp USB device PIDs
Jesper Nilsson (1):
cris: import memset.c from newlib: fixes compile error with newer (pre4.3) gcc
Jiri Kosina (2):
HID: fix processing of event quirks
HID: add LCSPEC from VERNIER to quirk list
Jody Belka (1):
x86: fixup machine_ops reboot_{32|64}.c unification fallout
Jonathan Corbet (1):
Be more robust about bad arguments in get_user_pages()
Jozsef Kadlecsik (1):
[NETFILTER] nf_conntrack_proto_tcp.c: Mistyped state corrected.
KOSAKI Motohiro (1):
mempolicy: silently restrict nodemask to allowed nodes
Kazunori MIYAZAWA (1):
[AF_KEY]: Fix bug in spdadd
Keiichi KII (1):
netconsole: avoid null pointer dereference at show_local_mac()
Kiyoshi Ueda (1):
ide: another possible ide panic fix for blk-end-request
Krishna Kumar (1):
Optimize cxgb3 xmit path (a bit)
Kristoffer Ericson (1):
sh: Tidy include/asm-sh/hp6xx.h
Kumar Gala (1):
[POWERPC] Remove generated files on make clean
Laszlo Attila Toth (1):
[RTNETLINK]: Send a single notification on device state changes.
Len Brown (2):
ACPI: DMI blacklist updates
ACPI: DMI: quirk for FSC ESPRIMO Mobile V5505
Linus Torvalds (3):
WMI: initialize wmi_blocks.list even if ACPI is disabled
acpi: fix acpi_os_read_pci_configuration() misuse of raw_pci_read()
Linux 2.6.25-rc2
Magnus Damm (18):
sh: declared coherent memory support V2 fix
sh: add sh7722 support to EARLY_SCIF_CONSOLE
sh: add probe support for new sh7722 cut
sh: break out unaligned sign extension code
sh: migor board support
sh: make copy_to/from_user() static inline
sh: add byte support to the sign extension code
sh: use opcode_t and enable unaligned code for sh2a
sh: update r2d defconfigs with usb, spi and rtc
sh: trapped io support V2
sh: trapped io support for r2d V2
sh: trapped io support for highlander V2
sh: fix ptrace copy_from/to_user() compilation error
sh: remove maskreg irq code
sh: add support for sh7366 processor
sh: use ctrl_in/out for on chip pci access
sh: fix ioreadN_rep and iowriteN_rep
sh: fix pci io access for r2d boards
Marcin Slusarz (4):
IB/mthca: Convert to use be16_add_cpu()
xfs: convert beX_add to beX_add_cpu (new common API)
udf: fix udf_add_free_space
slab: avoid double initialization & do initialization in 1 place
Masakazu Mokuno (7):
PS3: gelic: Fix the wrong dev_id passed
PS3: gelic: Add endianness macros
PS3: gelic: code cleanup
PS3: gelic: remove duplicated ethtool handlers
PS3: gelic: add support for port link status
PS3: gelic: Add support for dual network interface
PS3: gelic: Add wireless support for PS3
Mathieu Desnoyers (2):
Linux Kernel Markers: support multiple probes
Linux Kernel Markers: create modpost file
Matt Waddel (1):
m68knommu: fix profile timer
Matthew Wilcox (1):
Use proper abstractions in quirk_intel_irqbalance
Matti Linnanvuori (1):
[NET]: Fix race in dev_close(). (Bug 9750)
Michael Ellerman (1):
[POWERPC] Cell RAS: Remove DEBUG, and add license and copyright
Michael Opdenacker (1):
Documentation: sysctl/kernel.txt: fix documentation reference
Mike Frysinger (1):
FLAT binaries: drop BINFMT_FLAT bad header magic warning
Neil Turton (1):
[NET]: Improve cache line coherency of ingress qdisc
Nishanth Aravamudan (1):
hugetlb: fix overcommit locking
Olga Kornievskaia (1):
NFS: add missing spkm3 strings to mount option parser
Olof Johansson (1):
mlx4_core: Fix build break (missing include)
Paul E. McKenney (1):
rcupdate: fix comment
Paul Menage (1):
MAINTAINERS: add linux-fsdevel to VFS entry
Paul Mundt (21):
pcmcia: ipwireless depends on NETDEVICES
sh: Wire up new timerfd syscalls.
sh: Add mach-type entries for MigoR and SDK7780.
sh: Use max_t in io_trapped.
sh: Clean up whitespace damage in Kconfig.debug.
sh: Symbol exports for trapped I/O.
sh: Handle SH7366 CPU in check_bugs().
sh: Disable big endian for SH-5.
sh: Fix up pte_mkhuge() build breakage for SH-5.
sh: Fix up set_fixmap_nocache() for SH-5.
sh: Update SH-5 flush_cache_sigtramp() for API changes.
sh: Shut up some trivial build warnings.
sh: asm/tlb.h needs linux/pagemap.h for CONFIG_SWAP=n.
sh: Kill off bogus SH_SDK7780_STANDALONE symbol.
maple: Fix up maple build failure.
sh: Get SH-5 caches working again post-unification.
serial: sh-sci: Fix up SH-5 build.
sh: asm/irq.h needs asm/cpu/irq.h.
sh: __uncached_start only on sh32.
sh: Kill off more dead symbols.
net: xfrm statistics depend on INET
Pavel Emelyanov (5):
[NETLABEL]: Fix lookup logic of netlbl_domhsh_search_def.
[GENETLINK]: Relax dances with genl_lock.
[NETLABEL]: Compilation for CONFIG_AUDIT=n case.
[NETLABEL]: Don't produce unused variables when IPv6 is off.
[NETLABLE]: Hide netlbl_unlabel_audit_addr6 under ifdef CONFIG_IPV6.
Pekka Enberg (2):
Add Matt to MAINTAINERS as a SLAB allocator maintainer
slub: kmalloc page allocator pass-through cleanup
Peter Tiedemann (2):
lcs: avoid/reduce unused s390dbf debug areas.
claw/lcs/netiucv: check s390dbf level before sprints
Peter Zijlstra (10):
hrtimer: more hrtimer_init_sleeper() fallout.
sched: fair-group: separate tg->shares from task_group_lock
sched: fix incorrect irq lock usage in normalize_rt_tasks()
sched: rt-group: deal with PI
sched: rt-group: interface
sched: rt-group: make rt groups scheduling configurable
sched: rt-group: clean up the ifdeffery
sched: rt-group: refure unrunnable tasks
xtime_lock vs update_process_times
sh: fix xtime_lock deadlocking.
Prakash, Sathya (2):
[SCSI] mpt fusion: Avoid racing when mptsas and mptcl module are loaded in parallel
[SCSI] mpt fusion: Request I/O resources only when required
Rafael J. Wysocki (1):
ACPI suspend: Execute _WAK with the right argument
Rami Rosen (1):
[IPV6]: remove unused method declaration (net/ndisc.h).
Randy Dunlap (5):
kernel-doc: fix fs/pipe.c notation
docbook: move pipe and splice to filesystems docbook
docbook: sunrpc filenames and notation fixes
docbook: make a networking book and fix a few errors
docbook: drop z85230 library from kernel-api
Roel Kluin (1):
pnpacpi: __initdata is not an identifier
Roland Dreier (4):
SUNPRC: Fix printk format warning
IB/mthca: Add missing sg_init_table() in mthca_map_user_db()
IB/cm: Remove debug printk()s that snuck upstream
IB/cm: Fix infiniband_cm class kobject ref counting
Roland McGrath (1):
x86: vdso_install fix
R?mi Denis-Courmont (1):
[NET]: Make sure sockets implement splice_read
Salyzyn, Mark (3):
[SCSI] aacraid: add optional MSI support
[SCSI] aacraid: ignore adapter reset check polarity
[SCSI] aacraid: informational sysfs value corrections
Sam Ravnborg (1):
kbuild: fix make V=1
Sean Hefty (1):
RDMA/cma: Do not issue MRA if user rejects connection request
Sergei Shtylyov (2):
ide: insert BUG_ON() into __ide_set_handler() (take 2)
ide: introduce CONFIG_BLK_DEV_IDEDMA_SFF option
Sergio Luis (3):
drivers/net/sis190: fix section mismatch warning in sis190_get_mac_addr
[SCSI] gdth: update deprecated pci_find_device
fs/smbfs/inode.c: fix warning message deprecating smbfs
Stefan Roese (1):
[POWERPC] Fix arch/ppc compilation - add typedef for pgtable_t
Stephen Hemminger (2):
fib_trie: handle empty tree
fib_trie: /proc/net/route performance improvement
Stephen Rothwell (2):
sh: remove unneeded cast
[POWERPC] Wire up new timerfd syscalls
Stephen Smalley (1):
selinux: support 64-bit capabilities
Steve Wise (2):
cxgb3: Handle ARP completions that mark neighbors stale.
RDMA/cxgb3: Fail loopback connections
Takashi Yamamoto (2):
[POWERPC] PS3: Fix setting bookmark in logical performance monitor
[POWERPC] PS3: Fix reading pm interval in logical performance monitor
Tejun Heo (2):
pata_via: fix SATA cable detection on cx700
libata: ignore deverr on SETXFER if mode is configured
Thomas Bogendoerfer (1):
SC26XX: missing PORT define in serial_core.h
Thomas Gleixner (5):
x86: remove over noisy debug printk
x86: EFI: fix use of unitialized variable and the cache logic
hrtimer: check relative timeouts for overflow
hrtimer: catch expired CLOCK_REALTIME timers early
x86: cpa: ensure page alignment
Thomas Horsten (1):
[SCSI] MegaRAID driver management char device moved to misc
Tobias Mueller (1):
HID: add USB IDs for MacBook 3rd generation
Tony Breeds (1):
Fix compile of swim3 as module
Tony Luck (1):
[IA64] Fix build for sim_defconfig
Urs Thuermann (1):
[NET]: Fix comment for skb_pull_rcsum
Ursula Braun (2):
claw: removal of volatile variables
netiucv: change name of nop function
Venkatesh Pallipadi (3):
ACPI: fix suspend regression due to idle update
ACPI, cpuidle: Clarify C-state description in sysfs
cpuidle: Add Documentation
Walter T Gruczka (1):
m68knommu: fix coldfire interrupt exit path
YOSHIFUJI Hideaki (1):
[XFRM]: Avoid bogus BUG() when throwing new policy away.
Yinghai Lu (2):
[SCSI] ses: fix memory leaks
sata_mv: fix loop with last port
On Friday, 15 of February 2008, Linus Torvalds wrote:
>
> Ok,
> this kernel is a winner.
>
> Just to show how _much_ of a winner it is, it's been awarded a coveted
> "weasel" series name, which should tell you just how good it's going to
> be. It's a name revered in Linux kernel history, and as such this brings
> back the good old days where if you find a bug, you're almost certainly
> simply mistaken, and you probably just did something wrong.
>
> But hey, you can try to prove me wrong. I dare you.
Here you go.
commit 45b503548210fe6f23e92b856421c2a3f05fd034
Author: Laszlo Attila Toth <[email protected]>
Date: Tue Feb 12 22:42:09 2008 -0800
[RTNETLINK]: Send a single notification on device state changes.
contains the following gem:
if (tb[IFLA_LINKMODE]) {
- write_lock_bh(&dev_base_lock);
- dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
- write_unlock_bh(&dev_base_lock);
+ if (dev->link_mode != nla_get_u8(tb[IFLA_LINKMODE])) {
+ write_lock_bh(&dev_base_lock);
+ dev->link_mode = nla_get_u8(tb[IFLA_LINKMODE]);
+ write_lock_bh(&dev_base_lock);
+ modified = 1;
+ }
}
and even with that fixed it breaks NetworkManager (on my test box it apparently
can't get the IP address using DHCP). Reverting this commit makes things
work again.
Well, it looks like this patch went to you untested and unreviewed, so may I
gently request that it be reverted from your tree, pretty please?
Thanks,
Rafael
Hi,
The 2.6.25-rc2 kernel oopses while running dbench on ext3 filesystem
mounted with mount -o data=writeback,nobh option on the x86_64 box
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
IP: [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
PGD 1f6860067 PUD 1f5d64067 PMD 0
Oops: 0000 [1] SMP
CPU 3
Modules linked in:
Pid: 4271, comm: dbench Not tainted 2.6.25-rc2-autotest #1
RIP: 0010:[<ffffffff80274972>] [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
RSP: 0000:ffff8101fb041dc8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff810180033c00 RCX: ffffffff8027b269
RDX: 0000000000000000 RSI: 00000000000080d0 RDI: ffffffff80632d70
RBP: 00000000000080d0 R08: 0000000000000001 R09: 0000000000000000
R10: ffff8101feb36e50 R11: 0000000000000190 R12: 0000000000000001
R13: 0000000000000000 R14: ffff8101f8f38000 R15: 00000000ffffff9c
FS: 0000000000000000(0000) GS:ffff8101fff0f000(0063) knlGS:00000000f7e41460
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000001f5620000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process dbench (pid: 4271, threadinfo ffff8101fb040000, task ffff8101fb180000)
Stack: 0000000000000001 ffff8101fb041ea8 0000000000000001 ffffffff8027b269
ffff8101fb041ea8 ffffffff80281fe8 0000000000000001 0000000000000000
ffff8101fb041ea8 00000000ffffff9c 000000000000000b 0000000000000001
Call Trace:
[<ffffffff8027b269>] get_empty_filp+0x55/0xf9
[<ffffffff80281fe8>] __path_lookup_intent_open+0x22/0x8f
[<ffffffff80282853>] open_namei+0x86/0x5a7
[<ffffffff8027d019>] vfs_stat_fd+0x3c/0x4a
[<ffffffff80279ab1>] do_filp_open+0x1c/0x3d
[<ffffffff80279c2c>] get_unused_fd_flags+0x79/0x111
[<ffffffff80279dce>] do_sys_open+0x46/0xca
[<ffffffff80221c82>] ia32_sysret+0x0/0xa
Code: 24 00 00 00 48 98 48 8b 9c c7 d8 02 00 00 48 8b 13 f6 c2 01 74 12 83 ca ff 49 89 d8 89 ee e8 1f fb ff ff 48 89 c2 eb 13 8b 43 14 <48> 8b 34 c2 48 89 d0 48 0f b1 33 48 39 d0 75 d3 c1 ed 0f 31 c0
RIP [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
RSP <ffff8101fb041dc8>
CR2: 0000000000000000
BUG: unable to handle kernel paging request at 00000000f51f3e1c
IP: [<ffffffff80417d02>] tg3_poll+0x10c/0x82e
PGD 1f6860067 PUD 1f37a5067 PMD 0
Oops: 0000 [2] SMP
CPU 3
Modules linked in:
Pid: 4271, comm: dbench Tainted: G D 2.6.25-rc2-autotest #1
RIP: 0010:[<ffffffff80417d02>] [<ffffffff80417d02>] tg3_poll+0x10c/0x82e
RSP: 0000:ffff8100e3b6fe60 EFLAGS: 00010206
RAX: 00000000f51f3e18 RBX: ffff8101ff1d4f50 RCX: 00000000000032e1
RDX: 00000000000032e1 RSI: 0000000000000246 RDI: ffffffff806aaad8
RBP: ffff8101ff67e6c0 R08: ffff8100e3b6fedc R09: ffff8100e3b6fee0
R10: 0000000000000282 R11: 0000000000000282 R12: 000000000000014f
R13: ffff8101f51f3d80 R14: 0000000000000000 R15: 000000000000014f
FS: 0000000000000000(0000) GS:ffff8101fff0f000(0063) knlGS:00000000f7e41460
CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f51f3e1c CR3: 00000001f5620000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process dbench (pid: 4271, threadinfo ffff8101fb040000, task ffff8101fb180000)
Stack: ffff8101fb041d18 ffff8101feb83040 ffff8100e3b6ff20 ffffffff80228bd0
ffff8100e3b6feec 00000000fff0ff80 ffff8101ff0c4000 0000000000000246
ffff8101ff0c4000 0000004000000000 ffff8101ff67e758 ffff8101ff67e758
Call Trace:
<IRQ> [<ffffffff80228bd0>] run_rebalance_domains+0x162/0x432
[<ffffffff80477b5e>] net_rx_action+0x75/0x14a
[<ffffffff80233ef0>] __do_softirq+0x50/0xbb
[<ffffffff8020c33c>] call_softirq+0x1c/0x28
[<ffffffff8020e4b7>] do_softirq+0x2f/0x84
[<ffffffff8021b8a8>] smp_apic_timer_interrupt+0x8b/0x9e
[<ffffffff8020bde6>] apic_timer_interrupt+0x66/0x70
<EOI> [<ffffffff8021e3c0>] flat_send_IPI_mask+0x0/0x4c
[<ffffffff8020cca6>] oops_end+0x38/0x6a
[<ffffffff802200dd>] do_page_fault+0x716/0x7bf
[<ffffffff804ebab9>] error_exit+0x0/0x51
[<ffffffff8027b269>] get_empty_filp+0x55/0xf9
[<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
[<ffffffff8027b269>] get_empty_filp+0x55/0xf9
[<ffffffff80281fe8>] __path_lookup_intent_open+0x22/0x8f
[<ffffffff80282853>] open_namei+0x86/0x5a7
[<ffffffff8027d019>] vfs_stat_fd+0x3c/0x4a
[<ffffffff80279ab1>] do_filp_open+0x1c/0x3d
[<ffffffff80279c2c>] get_unused_fd_flags+0x79/0x111
[<ffffffff80279dce>] do_sys_open+0x46/0xca
[<ffffffff80221c82>] ia32_sysret+0x0/0xa
Code: 8b 05 a3 2e 29 00 41 ff c4 45 31 f6 41 81 e4 ff 01 00 00 ff 50 28 48 c7 03 00 00 00 00 41 8b 85 a0 00 00 00 49 03 85 a8 00 00 00 <0f> b7 40 04 39 44 24 2c 0f 8d 95 00 00 00 44 89 e0 48 6b d8 18
RIP [<ffffffff80417d02>] tg3_poll+0x10c/0x82e
RSP <ffff8100e3b6fe60>
CR2: 00000000f51f3e1c
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
Hi,
The softlockup is seen from 2.6.25-rc1-git{1,3} and is visible in the 2.6.24-rc2 kernel,
While booting up with the 2.6.25-rc1-git{1,3} and 2.6.25-rc2 kernel(s) on the powerbox
Loading st.ko module
BUG: soft lockup - CPU#1 stuck for 61s! [insmod:379]
NIP: c0000000001b0620 LR: c0000000001a5dcc CTR: 0000000000000040
REGS: c00000077caab8a0 TRAP: 0901 Not tainted (2.6.25-rc2-autotest)
MSR: 8000000000009032 <EE,ME,IR,DR> CR: 84004088 XER: 20000000
TASK = c00000077cb450a0[379] 'insmod' THREAD: c00000077caa8000 CPU: 1
GPR00: c00000077c9d4000 c00000077caabb20 c000000000538a40 000000000000000b
GPR04: ffc0000000000000 c00000077e0c0000 0000000000000036 000000000000000a
GPR08: 0040000000000000 c00000077c9d4250 c000000000000000 0000000000000000
GPR12: c00000077c9d4230 c000000000481d00
NIP [c0000000001b0620] .radix_tree_gang_lookup+0x100/0x1e4
LR [c0000000001a5dcc] .call_for_each_cic+0x50/0x10c
Call Trace:
[c00000077caabb20] [c0000000001a5e2c] .call_for_each_cic+0xb0/0x10c (unreliable)
[c00000077caabc60] [c00000000019dba4] .exit_io_context+0xf0/0x110
[c00000077caabcf0] [c000000000061e38] .do_exit+0x820/0x850
[c00000077caabda0] [c000000000061f34] .do_group_exit+0xcc/0xe8
[c00000077caabe30] [c00000000000872c] syscall_exit+0x0/0x40
Instruction dump:
7d296214 39290018 e8090000 7caa2038 39290008 2fa00000 409e0018 7caa4215
396b0001 418200cc 424000b8 4bffffdc <79691f24> 7d296214 e9690018 2fab0000
INFO: task insmod:387 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
insmod D 000000001000e144 12144 387 1
Call Trace:
[c00000077cb97600] [c0000000008fae80] 0xc0000000008fae80 (unreliable)
[c00000077cb977d0] [c000000000010c7c] .__switch_to+0x11c/0x154
[c00000077cb97860] [c000000000344498] .schedule+0x5d0/0x6b0
[c00000077cb97950] [c0000000003447d8] .schedule_timeout+0x3c/0xe8
[c00000077cb97a20] [c000000000343d34] .wait_for_common+0x150/0x22c
[c00000077cb97ae0] [c00000000008ef00] .__stop_machine_run+0xbc/0xf0
[c00000077cb97bb0] [c00000000008ef70] .stop_machine_run+0x3c/0x80
[c00000077cb97c50] [c0000000000891f0] .sys_init_module+0x14e4/0x1af4
[c00000077cb97e30] [c00000000000872c] syscall_exit+0x0/0x40
-- 0:conmux-control -- time-stamp -- Feb/15/08 16:04:12 --
INFO: task insmod:387 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
insmod D 000000001000e144 12144 387 1
Call Trace:
[c00000077cb97600] [c0000000008fae80] 0xc0000000008fae80 (unreliable)
[c00000077cb977d0] [c000000000010c7c] .__switch_to+0x11c/0x154
[c00000077cb97860] [c000000000344498] .schedule+0x5d0/0x6b0
[c00000077cb97950] [c0000000003447d8] .schedule_timeout+0x3c/0xe8
[c00000077cb97a20] [c000000000343d34] .wait_for_common+0x150/0x22c
[c00000077cb97ae0] [c00000000008ef00] .__stop_machine_run+0xbc/0xf0
[c00000077cb97bb0] [c00000000008ef70] .stop_machine_run+0x3c/0x80
[c00000077cb97c50] [c0000000000891f0] .sys_init_module+0x14e4/0x1af4
[c00000077cb97e30] [c00000000000872c] syscall_exit+0x0/0x40
-- 0:conmux-control -- time-stamp -- Feb/15/08 16:06:21 --
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
On Feb 15 2008 13:23, Linus Torvalds wrote:
>
>Just to show how _much_ of a winner it is, it's been awarded a coveted
>"weasel" series name, which should tell you just how good it's going to
>be. It's a name revered in Linux kernel history, and as such this brings
>back the good old days where if you find a bug, you're almost certainly
>simply mistaken, and you probably just did something wrong.
1. Release Linux Kernel
2. Give it a weasel name
3. ??
4. Profit!!
>
>But hey, you can try to prove me wrong. I dare you.
>
ERROR: "LGUEST_PAGES_guest_gdt_desc" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_gdt_desc" [drivers/lguest/lg.ko] undefined!
ERROR: "LGUEST_PAGES_host_cr3" [drivers/lguest/lg.ko] undefined!
...
.config see http://pastebin.ca/906358
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.25-rc2
# Sat Feb 16 13:29:43 2008
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
# CONFIG_GENERIC_LOCKBREAK is not set
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_QUICKLIST=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_GENERIC_GPIO is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set
CONFIG_ARCH_HAS_CPU_RELAX=y
# CONFIG_HAVE_SETUP_PER_CPU_AREA is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_AOUT=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
CONFIG_KTIME_SCALAR=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION="-testing"
CONFIG_LOCALVERSION_AUTO=y
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_BSD_PROCESS_ACCT_V3=y
CONFIG_TASKSTATS=y
CONFIG_TASK_DELAY_ACCT=y
# CONFIG_TASK_XACCT is not set
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_TREE=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
# CONFIG_CGROUPS is not set
CONFIG_GROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_RT_GROUP_SCHED=y
CONFIG_USER_SCHED=y
# CONFIG_CGROUP_SCHED is not set
# CONFIG_SYSFS_DEPRECATED is not set
CONFIG_RELAY=y
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
# CONFIG_USER_NS is not set
# CONFIG_PID_NS is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
# CONFIG_EMBEDDED is not set
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
# CONFIG_COMPAT_BRK is not set
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_SLUB_DEBUG=y
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
CONFIG_MARKERS=y
CONFIG_OPROFILE=m
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_HAVE_KPROBES=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
CONFIG_MODULE_SRCVERSION_ALL=y
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_LBD=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_LSF=y
CONFIG_BLK_DEV_BSG=y
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
# CONFIG_DEFAULT_AS is not set
CONFIG_DEFAULT_DEADLINE=y
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="deadline"
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_CLASSIC_RCU is not set
CONFIG_PREEMPT_RCU=y
#
# Processor type and features
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_X86_RDC321X is not set
# CONFIG_X86_VSMP is not set
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
CONFIG_PARAVIRT_GUEST=y
CONFIG_XEN=y
CONFIG_VMI=y
# CONFIG_LGUEST_GUEST is not set
CONFIG_PARAVIRT=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
CONFIG_MPENTIUM4=y
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_GENERIC_CPU is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_X86_XADD=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=4
CONFIG_X86_DEBUGCTLMSR=y
CONFIG_HPET_TIMER=y
CONFIG_HPET_EMULATE_RTC=y
# CONFIG_IOMMU_HELPER is not set
CONFIG_NR_CPUS=8
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_RCU_TRACE=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
CONFIG_X86_MCE_P4THERMAL=y
CONFIG_VM86=y
CONFIG_TOSHIBA=m
CONFIG_I8K=m
CONFIG_X86_REBOOTFIXUPS=y
CONFIG_MICROCODE=m
CONFIG_MICROCODE_OLD_INTERFACE=y
CONFIG_X86_MSR=m
CONFIG_X86_CPUID=m
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_RESOURCES_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_NR_QUICK=1
CONFIG_VIRT_TO_BUS=y
CONFIG_HIGHPTE=y
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
# CONFIG_EFI is not set
# CONFIG_IRQBALANCE is not set
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
# CONFIG_HZ_300 is not set
CONFIG_HZ_1000=y
CONFIG_HZ=1000
CONFIG_SCHED_HRTICK=y
CONFIG_KEXEC=y
# CONFIG_CRASH_DUMP is not set
CONFIG_PHYSICAL_START=0x100000
CONFIG_RELOCATABLE=y
CONFIG_PHYSICAL_ALIGN=0x100000
CONFIG_HOTPLUG_CPU=y
# CONFIG_COMPAT_VDSO is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
CONFIG_PM_DEBUG=y
CONFIG_PM_VERBOSE=y
CONFIG_CAN_PM_TRACE=y
# CONFIG_PM_TRACE_RTC is not set
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
CONFIG_HIBERNATION=y
CONFIG_PM_STD_PARTITION=""
CONFIG_ACPI=y
CONFIG_ACPI_SLEEP=y
CONFIG_ACPI_PROCFS=y
CONFIG_ACPI_PROCFS_POWER=y
CONFIG_ACPI_SYSFS_POWER=y
CONFIG_ACPI_PROC_EVENT=y
CONFIG_ACPI_AC=m
CONFIG_ACPI_BATTERY=m
CONFIG_ACPI_BUTTON=m
CONFIG_ACPI_VIDEO=m
CONFIG_ACPI_FAN=m
CONFIG_ACPI_DOCK=m
CONFIG_ACPI_BAY=m
CONFIG_ACPI_PROCESSOR=m
CONFIG_ACPI_HOTPLUG_CPU=y
CONFIG_ACPI_THERMAL=m
CONFIG_ACPI_WMI=m
# CONFIG_ACPI_ASUS is not set
CONFIG_ACPI_TOSHIBA=m
# CONFIG_ACPI_CUSTOM_DSDT is not set
CONFIG_ACPI_CUSTOM_DSDT_INITRD=y
CONFIG_ACPI_BLACKLIST_YEAR=2001
CONFIG_ACPI_DEBUG=y
# CONFIG_ACPI_DEBUG_FUNC_TRACE is not set
CONFIG_ACPI_EC=y
CONFIG_ACPI_POWER=y
CONFIG_ACPI_SYSTEM=y
CONFIG_X86_PM_TIMER=y
CONFIG_ACPI_CONTAINER=m
CONFIG_ACPI_SBS=m
# CONFIG_APM is not set
#
# CPU Frequency scaling
#
CONFIG_CPU_FREQ=y
CONFIG_CPU_FREQ_TABLE=y
# CONFIG_CPU_FREQ_DEBUG is not set
CONFIG_CPU_FREQ_STAT=m
CONFIG_CPU_FREQ_STAT_DETAILS=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE is not set
# CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE is not set
CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND=y
# CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE is not set
CONFIG_CPU_FREQ_GOV_PERFORMANCE=y
CONFIG_CPU_FREQ_GOV_POWERSAVE=m
CONFIG_CPU_FREQ_GOV_USERSPACE=m
CONFIG_CPU_FREQ_GOV_ONDEMAND=y
CONFIG_CPU_FREQ_GOV_CONSERVATIVE=m
#
# CPUFreq processor drivers
#
CONFIG_X86_ACPI_CPUFREQ=m
CONFIG_X86_POWERNOW_K6=m
CONFIG_X86_POWERNOW_K7=m
CONFIG_X86_POWERNOW_K7_ACPI=y
CONFIG_X86_POWERNOW_K8=m
CONFIG_X86_POWERNOW_K8_ACPI=y
CONFIG_X86_GX_SUSPMOD=m
CONFIG_X86_SPEEDSTEP_CENTRINO=m
CONFIG_X86_SPEEDSTEP_CENTRINO_TABLE=y
CONFIG_X86_SPEEDSTEP_ICH=m
CONFIG_X86_SPEEDSTEP_SMI=m
CONFIG_X86_P4_CLOCKMOD=m
CONFIG_X86_CPUFREQ_NFORCE2=m
CONFIG_X86_LONGRUN=m
CONFIG_X86_LONGHAUL=m
CONFIG_X86_E_POWERSAVER=m
#
# shared options
#
# CONFIG_X86_ACPI_CPUFREQ_PROC_INTF is not set
CONFIG_X86_SPEEDSTEP_LIB=m
CONFIG_X86_SPEEDSTEP_RELAXED_CAP_CHECK=y
CONFIG_CPU_IDLE=y
CONFIG_CPU_IDLE_GOV_LADDER=y
CONFIG_CPU_IDLE_GOV_MENU=y
#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_MMCONFIG=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=m
CONFIG_PCIEAER=y
CONFIG_ARCH_SUPPORTS_MSI=y
CONFIG_PCI_MSI=y
# CONFIG_PCI_LEGACY is not set
# CONFIG_PCI_DEBUG is not set
CONFIG_HT_IRQ=y
CONFIG_ISA_DMA_API=y
# CONFIG_ISA is not set
# CONFIG_MCA is not set
CONFIG_SCx200=m
CONFIG_SCx200HR_TIMER=m
CONFIG_K8_NB=y
# CONFIG_PCCARD is not set
CONFIG_HOTPLUG_PCI=m
CONFIG_HOTPLUG_PCI_FAKE=m
CONFIG_HOTPLUG_PCI_ACPI=m
CONFIG_HOTPLUG_PCI_ACPI_IBM=m
CONFIG_HOTPLUG_PCI_CPCI=y
CONFIG_HOTPLUG_PCI_CPCI_ZT5550=m
CONFIG_HOTPLUG_PCI_SHPC=m
#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_MISC=m
#
# Networking
#
CONFIG_NET=y
#
# Networking options
#
CONFIG_PACKET=m
CONFIG_PACKET_MMAP=y
CONFIG_UNIX=y
CONFIG_XFRM=y
CONFIG_XFRM_USER=m
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_NET_KEY=m
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
CONFIG_ASK_IP_FIB_HASH=y
# CONFIG_IP_FIB_TRIE is not set
CONFIG_IP_FIB_HASH=y
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
# CONFIG_IP_PNP is not set
CONFIG_NET_IPIP=m
CONFIG_NET_IPGRE=m
CONFIG_NET_IPGRE_BROADCAST=y
CONFIG_IP_MROUTE=y
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_ARPD is not set
CONFIG_SYN_COOKIES=y
CONFIG_INET_AH=m
CONFIG_INET_ESP=m
CONFIG_INET_IPCOMP=m
CONFIG_INET_XFRM_TUNNEL=m
CONFIG_INET_TUNNEL=m
CONFIG_INET_XFRM_MODE_TRANSPORT=m
CONFIG_INET_XFRM_MODE_TUNNEL=m
CONFIG_INET_XFRM_MODE_BEET=m
CONFIG_INET_LRO=m
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
CONFIG_TCP_CONG_ADVANCED=y
CONFIG_TCP_CONG_BIC=m
CONFIG_TCP_CONG_CUBIC=m
CONFIG_TCP_CONG_WESTWOOD=m
CONFIG_TCP_CONG_HTCP=m
CONFIG_TCP_CONG_HSTCP=m
CONFIG_TCP_CONG_HYBLA=m
CONFIG_TCP_CONG_VEGAS=m
CONFIG_TCP_CONG_SCALABLE=m
CONFIG_TCP_CONG_LP=m
CONFIG_TCP_CONG_VENO=m
CONFIG_TCP_CONG_YEAH=m
CONFIG_TCP_CONG_ILLINOIS=m
# CONFIG_DEFAULT_BIC is not set
# CONFIG_DEFAULT_CUBIC is not set
# CONFIG_DEFAULT_HTCP is not set
# CONFIG_DEFAULT_VEGAS is not set
# CONFIG_DEFAULT_WESTWOOD is not set
CONFIG_DEFAULT_RENO=y
CONFIG_DEFAULT_TCP_CONG="reno"
CONFIG_TCP_MD5SIG=y
CONFIG_IP_VS=m
# CONFIG_IP_VS_DEBUG is not set
CONFIG_IP_VS_TAB_BITS=12
#
# IPVS transport protocol load balancing support
#
CONFIG_IP_VS_PROTO_TCP=y
CONFIG_IP_VS_PROTO_UDP=y
CONFIG_IP_VS_PROTO_ESP=y
CONFIG_IP_VS_PROTO_AH=y
#
# IPVS scheduler
#
CONFIG_IP_VS_RR=m
CONFIG_IP_VS_WRR=m
CONFIG_IP_VS_LC=m
CONFIG_IP_VS_WLC=m
CONFIG_IP_VS_LBLC=m
CONFIG_IP_VS_LBLCR=m
CONFIG_IP_VS_DH=m
CONFIG_IP_VS_SH=m
CONFIG_IP_VS_SED=m
CONFIG_IP_VS_NQ=m
#
# IPVS application helper
#
CONFIG_IP_VS_FTP=m
CONFIG_IPV6=m
CONFIG_IPV6_PRIVACY=y
CONFIG_IPV6_ROUTER_PREF=y
CONFIG_IPV6_ROUTE_INFO=y
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
CONFIG_INET6_AH=m
CONFIG_INET6_ESP=m
CONFIG_INET6_IPCOMP=m
CONFIG_IPV6_MIP6=m
CONFIG_INET6_XFRM_TUNNEL=m
CONFIG_INET6_TUNNEL=m
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=m
CONFIG_IPV6_SIT=m
CONFIG_IPV6_TUNNEL=m
CONFIG_IPV6_MULTIPLE_TABLES=y
CONFIG_IPV6_SUBTREES=y
CONFIG_NETLABEL=y
CONFIG_NETWORK_SECMARK=y
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
CONFIG_BRIDGE_NETFILTER=y
#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
CONFIG_NF_CONNTRACK=m
CONFIG_NF_CT_ACCT=y
CONFIG_NF_CONNTRACK_MARK=y
CONFIG_NF_CONNTRACK_SECMARK=y
CONFIG_NF_CONNTRACK_EVENTS=y
CONFIG_NF_CT_PROTO_GRE=m
CONFIG_NF_CT_PROTO_SCTP=m
CONFIG_NF_CT_PROTO_UDPLITE=m
CONFIG_NF_CONNTRACK_AMANDA=m
CONFIG_NF_CONNTRACK_FTP=m
CONFIG_NF_CONNTRACK_H323=m
CONFIG_NF_CONNTRACK_IRC=m
CONFIG_NF_CONNTRACK_NETBIOS_NS=m
CONFIG_NF_CONNTRACK_PPTP=m
CONFIG_NF_CONNTRACK_SANE=m
CONFIG_NF_CONNTRACK_SIP=m
CONFIG_NF_CONNTRACK_TFTP=m
CONFIG_NF_CT_NETLINK=m
CONFIG_NETFILTER_XTABLES=m
CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
CONFIG_NETFILTER_XT_TARGET_DSCP=m
CONFIG_NETFILTER_XT_TARGET_MARK=m
CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
CONFIG_NETFILTER_XT_TARGET_NFLOG=m
CONFIG_NETFILTER_XT_TARGET_NOTRACK=m
CONFIG_NETFILTER_XT_TARGET_RATEEST=m
CONFIG_NETFILTER_XT_TARGET_TRACE=m
CONFIG_NETFILTER_XT_TARGET_SECMARK=m
CONFIG_NETFILTER_XT_TARGET_CONNSECMARK=m
CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
CONFIG_NETFILTER_XT_TARGET_TCPOPTSTRIP=m
CONFIG_NETFILTER_XT_MATCH_COMMENT=m
CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
CONFIG_NETFILTER_XT_MATCH_DCCP=m
CONFIG_NETFILTER_XT_MATCH_DSCP=m
CONFIG_NETFILTER_XT_MATCH_ESP=m
CONFIG_NETFILTER_XT_MATCH_HELPER=m
CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
CONFIG_NETFILTER_XT_MATCH_LENGTH=m
CONFIG_NETFILTER_XT_MATCH_LIMIT=m
CONFIG_NETFILTER_XT_MATCH_MAC=m
CONFIG_NETFILTER_XT_MATCH_MARK=m
CONFIG_NETFILTER_XT_MATCH_OWNER=m
CONFIG_NETFILTER_XT_MATCH_POLICY=m
CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
CONFIG_NETFILTER_XT_MATCH_PHYSDEV=m
CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
CONFIG_NETFILTER_XT_MATCH_QUOTA=m
CONFIG_NETFILTER_XT_MATCH_RATEEST=m
CONFIG_NETFILTER_XT_MATCH_REALM=m
CONFIG_NETFILTER_XT_MATCH_SCTP=m
CONFIG_NETFILTER_XT_MATCH_STATE=m
CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
CONFIG_NETFILTER_XT_MATCH_STRING=m
CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
CONFIG_NETFILTER_XT_MATCH_TIME=m
CONFIG_NETFILTER_XT_MATCH_U32=m
CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
#
# IP: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV4=m
CONFIG_NF_CONNTRACK_PROC_COMPAT=y
CONFIG_IP_NF_QUEUE=m
CONFIG_IP_NF_IPTABLES=m
CONFIG_IP_NF_MATCH_RECENT=m
CONFIG_IP_NF_MATCH_ECN=m
CONFIG_IP_NF_MATCH_AH=m
CONFIG_IP_NF_MATCH_TTL=m
CONFIG_IP_NF_MATCH_ADDRTYPE=m
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
CONFIG_IP_NF_TARGET_LOG=m
CONFIG_IP_NF_TARGET_ULOG=m
CONFIG_NF_NAT=m
CONFIG_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
CONFIG_IP_NF_TARGET_NETMAP=m
CONFIG_NF_NAT_SNMP_BASIC=m
CONFIG_NF_NAT_PROTO_GRE=m
CONFIG_NF_NAT_FTP=m
CONFIG_NF_NAT_IRC=m
CONFIG_NF_NAT_TFTP=m
CONFIG_NF_NAT_AMANDA=m
CONFIG_NF_NAT_PPTP=m
CONFIG_NF_NAT_H323=m
CONFIG_NF_NAT_SIP=m
CONFIG_IP_NF_MANGLE=m
CONFIG_IP_NF_TARGET_ECN=m
CONFIG_IP_NF_TARGET_TTL=m
CONFIG_IP_NF_TARGET_CLUSTERIP=m
CONFIG_IP_NF_RAW=m
CONFIG_IP_NF_ARPTABLES=m
CONFIG_IP_NF_ARPFILTER=m
CONFIG_IP_NF_ARP_MANGLE=m
#
# IPv6: Netfilter Configuration
#
CONFIG_NF_CONNTRACK_IPV6=m
CONFIG_IP6_NF_QUEUE=m
CONFIG_IP6_NF_IPTABLES=m
CONFIG_IP6_NF_MATCH_RT=m
CONFIG_IP6_NF_MATCH_OPTS=m
CONFIG_IP6_NF_MATCH_FRAG=m
CONFIG_IP6_NF_MATCH_HL=m
CONFIG_IP6_NF_MATCH_IPV6HEADER=m
CONFIG_IP6_NF_MATCH_AH=m
CONFIG_IP6_NF_MATCH_MH=m
CONFIG_IP6_NF_MATCH_EUI64=m
CONFIG_IP6_NF_FILTER=m
CONFIG_IP6_NF_TARGET_LOG=m
CONFIG_IP6_NF_TARGET_REJECT=m
CONFIG_IP6_NF_MANGLE=m
CONFIG_IP6_NF_TARGET_HL=m
CONFIG_IP6_NF_RAW=m
#
# Bridge: Netfilter Configuration
#
CONFIG_BRIDGE_NF_EBTABLES=m
CONFIG_BRIDGE_EBT_BROUTE=m
CONFIG_BRIDGE_EBT_T_FILTER=m
CONFIG_BRIDGE_EBT_T_NAT=m
CONFIG_BRIDGE_EBT_802_3=m
CONFIG_BRIDGE_EBT_AMONG=m
CONFIG_BRIDGE_EBT_ARP=m
CONFIG_BRIDGE_EBT_IP=m
CONFIG_BRIDGE_EBT_LIMIT=m
CONFIG_BRIDGE_EBT_MARK=m
CONFIG_BRIDGE_EBT_PKTTYPE=m
CONFIG_BRIDGE_EBT_STP=m
CONFIG_BRIDGE_EBT_VLAN=m
CONFIG_BRIDGE_EBT_ARPREPLY=m
CONFIG_BRIDGE_EBT_DNAT=m
CONFIG_BRIDGE_EBT_MARK_T=m
CONFIG_BRIDGE_EBT_REDIRECT=m
CONFIG_BRIDGE_EBT_SNAT=m
CONFIG_BRIDGE_EBT_LOG=m
CONFIG_BRIDGE_EBT_ULOG=m
CONFIG_IP_DCCP=m
CONFIG_INET_DCCP_DIAG=m
CONFIG_IP_DCCP_ACKVEC=y
#
# DCCP CCIDs Configuration (EXPERIMENTAL)
#
CONFIG_IP_DCCP_CCID2=m
# CONFIG_IP_DCCP_CCID2_DEBUG is not set
CONFIG_IP_DCCP_CCID3=m
# CONFIG_IP_DCCP_CCID3_DEBUG is not set
CONFIG_IP_DCCP_CCID3_RTO=100
CONFIG_IP_DCCP_TFRC_LIB=m
#
# DCCP Kernel Hacking
#
# CONFIG_IP_DCCP_DEBUG is not set
# CONFIG_NET_DCCPPROBE is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_MSG is not set
# CONFIG_SCTP_DBG_OBJCNT is not set
# CONFIG_SCTP_HMAC_NONE is not set
# CONFIG_SCTP_HMAC_SHA1 is not set
CONFIG_SCTP_HMAC_MD5=y
# CONFIG_TIPC is not set
CONFIG_ATM=m
CONFIG_ATM_CLIP=m
CONFIG_ATM_CLIP_NO_ICMP=y
CONFIG_ATM_LANE=m
CONFIG_ATM_MPOA=m
CONFIG_ATM_BR2684=m
# CONFIG_ATM_BR2684_IPFILTER is not set
CONFIG_BRIDGE=m
CONFIG_VLAN_8021Q=m
# CONFIG_DECNET is not set
CONFIG_LLC=m
CONFIG_LLC2=m
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
CONFIG_X25=m
CONFIG_LAPB=m
# CONFIG_ECONET is not set
CONFIG_WAN_ROUTER=m
CONFIG_NET_SCHED=y
#
# Queueing/Scheduling
#
CONFIG_NET_SCH_CBQ=m
CONFIG_NET_SCH_HTB=m
CONFIG_NET_SCH_HFSC=m
CONFIG_NET_SCH_ATM=m
CONFIG_NET_SCH_PRIO=m
CONFIG_NET_SCH_RR=m
CONFIG_NET_SCH_RED=m
CONFIG_NET_SCH_SFQ=m
CONFIG_NET_SCH_TEQL=m
CONFIG_NET_SCH_TBF=m
CONFIG_NET_SCH_GRED=m
CONFIG_NET_SCH_DSMARK=m
CONFIG_NET_SCH_NETEM=m
CONFIG_NET_SCH_INGRESS=m
#
# Classification
#
CONFIG_NET_CLS=y
CONFIG_NET_CLS_BASIC=m
CONFIG_NET_CLS_TCINDEX=m
CONFIG_NET_CLS_ROUTE4=m
CONFIG_NET_CLS_ROUTE=y
CONFIG_NET_CLS_FW=m
CONFIG_NET_CLS_U32=m
CONFIG_CLS_U32_PERF=y
CONFIG_CLS_U32_MARK=y
CONFIG_NET_CLS_RSVP=m
CONFIG_NET_CLS_RSVP6=m
CONFIG_NET_CLS_FLOW=m
# CONFIG_NET_EMATCH is not set
CONFIG_NET_CLS_ACT=y
CONFIG_NET_ACT_POLICE=m
CONFIG_NET_ACT_GACT=m
CONFIG_GACT_PROB=y
CONFIG_NET_ACT_MIRRED=m
CONFIG_NET_ACT_IPT=m
CONFIG_NET_ACT_NAT=m
CONFIG_NET_ACT_PEDIT=m
CONFIG_NET_ACT_SIMP=m
# CONFIG_NET_CLS_IND is not set
CONFIG_NET_SCH_FIFO=y
#
# Network testing
#
CONFIG_NET_PKTGEN=m
CONFIG_NET_TCPPROBE=m
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
CONFIG_IRDA=m
#
# IrDA protocols
#
CONFIG_IRLAN=m
CONFIG_IRNET=m
CONFIG_IRCOMM=m
CONFIG_IRDA_ULTRA=y
#
# IrDA options
#
CONFIG_IRDA_CACHE_LAST_LSAP=y
# CONFIG_IRDA_FAST_RR is not set
# CONFIG_IRDA_DEBUG is not set
#
# Infrared-port device drivers
#
#
# SIR device drivers
#
CONFIG_IRTTY_SIR=m
#
# Dongle support
#
CONFIG_DONGLE=y
CONFIG_ESI_DONGLE=m
CONFIG_ACTISYS_DONGLE=m
CONFIG_TEKRAM_DONGLE=m
CONFIG_TOIM3232_DONGLE=m
CONFIG_LITELINK_DONGLE=m
CONFIG_MA600_DONGLE=m
CONFIG_GIRBIL_DONGLE=m
CONFIG_MCP2120_DONGLE=m
CONFIG_OLD_BELKIN_DONGLE=m
CONFIG_ACT200L_DONGLE=m
CONFIG_KINGSUN_DONGLE=m
CONFIG_KSDAZZLE_DONGLE=m
CONFIG_KS959_DONGLE=m
#
# FIR device drivers
#
CONFIG_USB_IRDA=m
CONFIG_SIGMATEL_FIR=m
CONFIG_NSC_FIR=m
CONFIG_WINBOND_FIR=m
CONFIG_TOSHIBA_FIR=m
CONFIG_SMC_IRCC_FIR=m
CONFIG_ALI_FIR=m
CONFIG_VLSI_FIR=m
CONFIG_VIA_FIR=m
CONFIG_MCS_FIR=m
CONFIG_BT=m
CONFIG_BT_L2CAP=m
CONFIG_BT_SCO=m
CONFIG_BT_RFCOMM=m
CONFIG_BT_RFCOMM_TTY=y
CONFIG_BT_BNEP=m
CONFIG_BT_BNEP_MC_FILTER=y
CONFIG_BT_BNEP_PROTO_FILTER=y
CONFIG_BT_CMTP=m
CONFIG_BT_HIDP=m
#
# Bluetooth device drivers
#
CONFIG_BT_HCIUSB=m
CONFIG_BT_HCIUSB_SCO=y
CONFIG_BT_HCIBTSDIO=m
CONFIG_BT_HCIUART=m
CONFIG_BT_HCIUART_H4=y
CONFIG_BT_HCIUART_BCSP=y
CONFIG_BT_HCIUART_LL=y
CONFIG_BT_HCIBCM203X=m
CONFIG_BT_HCIBPA10X=m
CONFIG_BT_HCIBFUSB=m
CONFIG_BT_HCIVHCI=m
CONFIG_AF_RXRPC=m
# CONFIG_AF_RXRPC_DEBUG is not set
CONFIG_RXKAD=m
CONFIG_FIB_RULES=y
#
# Wireless
#
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT is not set
# CONFIG_MAC80211 is not set
# CONFIG_IEEE80211 is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
# CONFIG_STANDALONE is not set
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=m
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
CONFIG_PARPORT=m
CONFIG_PARPORT_PC=m
CONFIG_PARPORT_SERIAL=m
CONFIG_PARPORT_PC_FIFO=y
CONFIG_PARPORT_PC_SUPERIO=y
# CONFIG_PARPORT_GSC is not set
CONFIG_PARPORT_AX88796=m
CONFIG_PARPORT_1284=y
CONFIG_PARPORT_NOT_PC=y
CONFIG_PNP=y
# CONFIG_PNP_DEBUG is not set
#
# Protocols
#
CONFIG_PNPACPI=y
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_FD is not set
# CONFIG_PARIDE is not set
CONFIG_BLK_CPQ_DA=m
CONFIG_BLK_CPQ_CISS_DA=m
CONFIG_CISS_SCSI_TAPE=y
CONFIG_BLK_DEV_DAC960=m
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_CRYPTOLOOP=m
CONFIG_BLK_DEV_NBD=m
CONFIG_BLK_DEV_SX8=m
# CONFIG_BLK_DEV_UB is not set
CONFIG_BLK_DEV_RAM=m
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=64000
CONFIG_BLK_DEV_XIP=y
CONFIG_CDROM_PKTCDVD=m
CONFIG_CDROM_PKTCDVD_BUFFERS=8
# CONFIG_CDROM_PKTCDVD_WCACHE is not set
CONFIG_ATA_OVER_ETH=m
CONFIG_XEN_BLKDEV_FRONTEND=y
CONFIG_VIRTIO_BLK=m
CONFIG_MISC_DEVICES=y
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_SGI_IOC4 is not set
CONFIG_TIFM_CORE=m
CONFIG_TIFM_7XX1=m
CONFIG_ACER_WMI=m
# CONFIG_ASUS_LAPTOP is not set
# CONFIG_FUJITSU_LAPTOP is not set
CONFIG_TC1100_WMI=m
# CONFIG_MSI_LAPTOP is not set
# CONFIG_SONY_LAPTOP is not set
# CONFIG_THINKPAD_ACPI is not set
CONFIG_INTEL_MENLOW=m
# CONFIG_ENCLOSURE_SERVICES is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set
#
# SCSI device support
#
CONFIG_RAID_ATTRS=m
CONFIG_SCSI=m
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
CONFIG_SCSI_NETLINK=y
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=m
CONFIG_CHR_DEV_ST=m
CONFIG_CHR_DEV_OSST=m
CONFIG_BLK_DEV_SR=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_CHR_DEV_SG=m
CONFIG_CHR_DEV_SCH=m
#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m
#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=m
CONFIG_SCSI_FC_ATTRS=m
CONFIG_SCSI_ISCSI_ATTRS=m
CONFIG_SCSI_SAS_ATTRS=m
CONFIG_SCSI_SAS_LIBSAS=m
CONFIG_SCSI_SAS_ATA=y
CONFIG_SCSI_SAS_HOST_SMP=y
CONFIG_SCSI_SAS_LIBSAS_DEBUG=y
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
CONFIG_ISCSI_TCP=m
CONFIG_BLK_DEV_3W_XXXX_RAID=m
CONFIG_SCSI_3W_9XXX=m
CONFIG_SCSI_ACARD=m
CONFIG_SCSI_AACRAID=m
CONFIG_SCSI_AIC7XXX=m
CONFIG_AIC7XXX_CMDS_PER_DEVICE=32
CONFIG_AIC7XXX_RESET_DELAY_MS=5000
# CONFIG_AIC7XXX_DEBUG_ENABLE is not set
CONFIG_AIC7XXX_DEBUG_MASK=0
CONFIG_AIC7XXX_REG_PRETTY_PRINT=y
CONFIG_SCSI_AIC7XXX_OLD=m
CONFIG_SCSI_AIC79XX=m
CONFIG_AIC79XX_CMDS_PER_DEVICE=32
CONFIG_AIC79XX_RESET_DELAY_MS=15000
# CONFIG_AIC79XX_DEBUG_ENABLE is not set
CONFIG_AIC79XX_DEBUG_MASK=0
CONFIG_AIC79XX_REG_PRETTY_PRINT=y
CONFIG_SCSI_AIC94XX=m
CONFIG_AIC94XX_DEBUG=y
CONFIG_SCSI_DPT_I2O=m
CONFIG_SCSI_ADVANSYS=m
CONFIG_SCSI_ARCMSR=m
CONFIG_SCSI_ARCMSR_AER=y
CONFIG_MEGARAID_NEWGEN=y
CONFIG_MEGARAID_MM=m
CONFIG_MEGARAID_MAILBOX=m
CONFIG_MEGARAID_LEGACY=m
CONFIG_MEGARAID_SAS=m
CONFIG_SCSI_HPTIOP=m
CONFIG_SCSI_BUSLOGIC=m
# CONFIG_SCSI_OMIT_FLASHPOINT is not set
CONFIG_SCSI_DMX3191D=m
CONFIG_SCSI_EATA=m
CONFIG_SCSI_EATA_TAGGED_QUEUE=y
CONFIG_SCSI_EATA_LINKED_COMMANDS=y
CONFIG_SCSI_EATA_MAX_TAGS=16
CONFIG_SCSI_FUTURE_DOMAIN=m
CONFIG_SCSI_GDTH=m
CONFIG_SCSI_IPS=m
CONFIG_SCSI_INITIO=m
CONFIG_SCSI_INIA100=m
# CONFIG_SCSI_PPA is not set
# CONFIG_SCSI_IMM is not set
CONFIG_SCSI_STEX=m
CONFIG_SCSI_SYM53C8XX_2=m
CONFIG_SCSI_SYM53C8XX_DMA_ADDRESSING_MODE=1
CONFIG_SCSI_SYM53C8XX_DEFAULT_TAGS=16
CONFIG_SCSI_SYM53C8XX_MAX_TAGS=64
CONFIG_SCSI_SYM53C8XX_MMIO=y
CONFIG_SCSI_IPR=m
CONFIG_SCSI_IPR_TRACE=y
CONFIG_SCSI_IPR_DUMP=y
CONFIG_SCSI_QLOGIC_1280=m
CONFIG_SCSI_QLA_FC=m
CONFIG_SCSI_QLA_ISCSI=m
CONFIG_SCSI_LPFC=m
CONFIG_SCSI_DC395x=m
CONFIG_SCSI_DC390T=m
CONFIG_SCSI_NSP32=m
CONFIG_SCSI_DEBUG=m
# CONFIG_SCSI_SRP is not set
CONFIG_ATA=m
# CONFIG_ATA_NONSTANDARD is not set
CONFIG_ATA_ACPI=y
CONFIG_SATA_AHCI=m
CONFIG_SATA_SVW=m
CONFIG_ATA_PIIX=m
CONFIG_SATA_MV=m
CONFIG_SATA_NV=m
CONFIG_PDC_ADMA=m
CONFIG_SATA_QSTOR=m
CONFIG_SATA_PROMISE=m
CONFIG_SATA_SX4=m
CONFIG_SATA_SIL=m
CONFIG_SATA_SIL24=m
CONFIG_SATA_SIS=m
CONFIG_SATA_ULI=m
CONFIG_SATA_VIA=m
CONFIG_SATA_VITESSE=m
CONFIG_SATA_INIC162X=m
CONFIG_PATA_ACPI=m
CONFIG_PATA_ALI=m
CONFIG_PATA_AMD=m
CONFIG_PATA_ARTOP=m
CONFIG_PATA_ATIIXP=m
CONFIG_PATA_CMD640_PCI=m
CONFIG_PATA_CMD64X=m
CONFIG_PATA_CS5520=m
CONFIG_PATA_CS5530=m
CONFIG_PATA_CS5535=m
CONFIG_PATA_CS5536=m
CONFIG_PATA_CYPRESS=m
CONFIG_PATA_EFAR=m
CONFIG_ATA_GENERIC=m
CONFIG_PATA_HPT366=m
CONFIG_PATA_HPT37X=m
CONFIG_PATA_HPT3X2N=m
CONFIG_PATA_HPT3X3=m
# CONFIG_PATA_HPT3X3_DMA is not set
CONFIG_PATA_IT821X=m
CONFIG_PATA_IT8213=m
CONFIG_PATA_JMICRON=m
CONFIG_PATA_TRIFLEX=m
CONFIG_PATA_MARVELL=m
CONFIG_PATA_MPIIX=m
CONFIG_PATA_OLDPIIX=m
CONFIG_PATA_NETCELL=m
# CONFIG_PATA_NINJA32 is not set
CONFIG_PATA_NS87410=m
CONFIG_PATA_NS87415=m
CONFIG_PATA_OPTI=m
CONFIG_PATA_OPTIDMA=m
CONFIG_PATA_PDC_OLD=m
CONFIG_PATA_RADISYS=m
CONFIG_PATA_RZ1000=m
CONFIG_PATA_SC1200=m
CONFIG_PATA_SERVERWORKS=m
CONFIG_PATA_PDC2027X=m
CONFIG_PATA_SIL680=m
CONFIG_PATA_SIS=m
CONFIG_PATA_VIA=m
CONFIG_PATA_WINBOND=m
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
CONFIG_MD_LINEAR=m
CONFIG_MD_RAID0=m
CONFIG_MD_RAID1=m
CONFIG_MD_RAID10=m
CONFIG_MD_RAID456=m
CONFIG_MD_RAID5_RESHAPE=y
CONFIG_MD_MULTIPATH=m
CONFIG_MD_FAULTY=m
CONFIG_BLK_DEV_DM=m
# CONFIG_DM_DEBUG is not set
CONFIG_DM_CRYPT=m
CONFIG_DM_SNAPSHOT=m
CONFIG_DM_MIRROR=m
CONFIG_DM_ZERO=m
CONFIG_DM_MULTIPATH=m
CONFIG_DM_MULTIPATH_EMC=m
CONFIG_DM_MULTIPATH_RDAC=m
CONFIG_DM_MULTIPATH_HP=m
CONFIG_DM_DELAY=m
CONFIG_DM_UEVENT=y
CONFIG_FUSION=y
CONFIG_FUSION_SPI=m
CONFIG_FUSION_FC=m
CONFIG_FUSION_SAS=m
CONFIG_FUSION_MAX_SGE=128
CONFIG_FUSION_CTL=m
CONFIG_FUSION_LAN=m
CONFIG_FUSION_LOGGING=y
#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
CONFIG_IEEE1394=m
#
# Subsystem Options
#
# CONFIG_IEEE1394_VERBOSEDEBUG is not set
#
# Controllers
#
CONFIG_IEEE1394_PCILYNX=m
CONFIG_IEEE1394_OHCI1394=m
#
# Protocols
#
CONFIG_IEEE1394_VIDEO1394=m
CONFIG_IEEE1394_SBP2=m
# CONFIG_IEEE1394_SBP2_PHYS_DMA is not set
CONFIG_IEEE1394_ETH1394_ROM_ENTRY=y
CONFIG_IEEE1394_ETH1394=m
CONFIG_IEEE1394_DV1394=m
CONFIG_IEEE1394_RAWIO=m
CONFIG_I2O=m
CONFIG_I2O_LCT_NOTIFY_ON_CHANGES=y
CONFIG_I2O_EXT_ADAPTEC=y
CONFIG_I2O_CONFIG=m
CONFIG_I2O_CONFIG_OLD_IOCTL=y
CONFIG_I2O_BUS=m
CONFIG_I2O_BLOCK=m
CONFIG_I2O_SCSI=m
CONFIG_I2O_PROC=m
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_NETDEVICES_MULTIQUEUE=y
CONFIG_IFB=m
CONFIG_DUMMY=m
CONFIG_BONDING=m
# CONFIG_MACVLAN is not set
CONFIG_EQUALIZER=m
CONFIG_TUN=m
CONFIG_VETH=y
CONFIG_NET_SB1000=m
# CONFIG_ARCNET is not set
CONFIG_PHYLIB=m
#
# MII PHY device drivers
#
CONFIG_MARVELL_PHY=m
CONFIG_DAVICOM_PHY=m
CONFIG_QSEMI_PHY=m
CONFIG_LXT_PHY=m
CONFIG_CICADA_PHY=m
CONFIG_VITESSE_PHY=m
CONFIG_SMSC_PHY=m
CONFIG_BROADCOM_PHY=m
CONFIG_ICPLUS_PHY=m
CONFIG_REALTEK_PHY=m
CONFIG_FIXED_PHY=y
CONFIG_MDIO_BITBANG=m
CONFIG_NET_ETHERNET=y
CONFIG_MII=m
CONFIG_HAPPYMEAL=m
CONFIG_SUNGEM=m
CONFIG_CASSINI=m
CONFIG_NET_VENDOR_3COM=y
CONFIG_VORTEX=m
CONFIG_TYPHOON=m
CONFIG_ENC28J60=m
# CONFIG_ENC28J60_WRITEVERIFY is not set
CONFIG_NET_TULIP=y
CONFIG_DE2104X=m
CONFIG_TULIP=m
# CONFIG_TULIP_MWI is not set
# CONFIG_TULIP_MMIO is not set
CONFIG_TULIP_NAPI=y
CONFIG_TULIP_NAPI_HW_MITIGATION=y
CONFIG_DE4X5=m
CONFIG_WINBOND_840=m
CONFIG_DM9102=m
CONFIG_ULI526X=m
CONFIG_HP100=m
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
CONFIG_PCNET32=m
CONFIG_PCNET32_NAPI=y
CONFIG_AMD8111_ETH=m
# CONFIG_AMD8111E_NAPI is not set
CONFIG_ADAPTEC_STARFIRE=m
CONFIG_ADAPTEC_STARFIRE_NAPI=y
CONFIG_B44=m
CONFIG_B44_PCI_AUTOSELECT=y
CONFIG_B44_PCICORE_AUTOSELECT=y
CONFIG_B44_PCI=y
CONFIG_FORCEDETH=m
CONFIG_FORCEDETH_NAPI=y
CONFIG_EEPRO100=m
CONFIG_E100=m
CONFIG_FEALNX=m
CONFIG_NATSEMI=m
CONFIG_NE2K_PCI=m
CONFIG_8139CP=m
CONFIG_8139TOO=m
# CONFIG_8139TOO_PIO is not set
# CONFIG_8139TOO_TUNE_TWISTER is not set
CONFIG_8139TOO_8129=y
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
CONFIG_SIS900=m
CONFIG_EPIC100=m
CONFIG_SUNDANCE=m
# CONFIG_SUNDANCE_MMIO is not set
CONFIG_TLAN=m
CONFIG_VIA_RHINE=m
# CONFIG_VIA_RHINE_MMIO is not set
CONFIG_VIA_RHINE_NAPI=y
CONFIG_SC92031=m
CONFIG_NET_POCKET=y
CONFIG_ATP=m
CONFIG_DE600=m
CONFIG_DE620=m
CONFIG_NETDEV_1000=y
CONFIG_ACENIC=m
# CONFIG_ACENIC_OMIT_TIGON_I is not set
CONFIG_DL2K=m
CONFIG_E1000=m
CONFIG_E1000_NAPI=y
# CONFIG_E1000_DISABLE_PACKET_SPLIT is not set
CONFIG_E1000E=m
CONFIG_E1000E_ENABLED=y
CONFIG_IP1000=m
CONFIG_IGB=m
CONFIG_NS83820=m
CONFIG_HAMACHI=m
CONFIG_YELLOWFIN=m
CONFIG_R8169=m
CONFIG_R8169_NAPI=y
CONFIG_R8169_VLAN=y
CONFIG_SIS190=m
CONFIG_SKGE=m
# CONFIG_SKGE_DEBUG is not set
CONFIG_SKY2=m
# CONFIG_SKY2_DEBUG is not set
CONFIG_SK98LIN=m
CONFIG_VIA_VELOCITY=m
CONFIG_TIGON3=m
CONFIG_BNX2=m
CONFIG_QLA3XXX=m
CONFIG_ATL1=m
# CONFIG_NETDEV_10000 is not set
# CONFIG_TR is not set
#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set
#
# USB Network Adapters
#
CONFIG_USB_CATC=m
CONFIG_USB_KAWETH=m
CONFIG_USB_PEGASUS=m
CONFIG_USB_RTL8150=m
CONFIG_USB_USBNET=m
CONFIG_USB_NET_AX8817X=m
CONFIG_USB_NET_CDCETHER=m
CONFIG_USB_NET_DM9601=m
CONFIG_USB_NET_GL620A=m
CONFIG_USB_NET_NET1080=m
CONFIG_USB_NET_PLUSB=m
CONFIG_USB_NET_MCS7830=m
CONFIG_USB_NET_RNDIS_HOST=m
CONFIG_USB_NET_CDC_SUBSET=m
CONFIG_USB_ALI_M5632=y
CONFIG_USB_AN2720=y
CONFIG_USB_BELKIN=y
CONFIG_USB_ARMLINUX=y
CONFIG_USB_EPSON2888=y
CONFIG_USB_KC2190=y
CONFIG_USB_NET_ZAURUS=m
CONFIG_WAN=y
CONFIG_LANMEDIA=m
CONFIG_HDLC=m
CONFIG_HDLC_RAW=m
CONFIG_HDLC_RAW_ETH=m
CONFIG_HDLC_CISCO=m
CONFIG_HDLC_FR=m
CONFIG_HDLC_PPP=m
CONFIG_HDLC_X25=m
CONFIG_PCI200SYN=m
CONFIG_WANXL=m
# CONFIG_PC300 is not set
CONFIG_PC300TOO=m
CONFIG_FARSYNC=m
# CONFIG_DSCC4 is not set
CONFIG_DLCI=m
CONFIG_DLCI_MAX=8
# CONFIG_WAN_ROUTER_DRIVERS is not set
CONFIG_LAPBETHER=m
CONFIG_X25_ASY=m
# CONFIG_SBNI is not set
CONFIG_ATM_DRIVERS=y
CONFIG_ATM_DUMMY=m
CONFIG_ATM_TCP=m
CONFIG_ATM_LANAI=m
CONFIG_ATM_ENI=m
# CONFIG_ATM_ENI_DEBUG is not set
# CONFIG_ATM_ENI_TUNE_BURST is not set
CONFIG_ATM_FIRESTREAM=m
CONFIG_ATM_ZATM=m
# CONFIG_ATM_ZATM_DEBUG is not set
CONFIG_ATM_NICSTAR=m
CONFIG_ATM_NICSTAR_USE_SUNI=y
CONFIG_ATM_NICSTAR_USE_IDT77105=y
CONFIG_ATM_IDT77252=m
# CONFIG_ATM_IDT77252_DEBUG is not set
CONFIG_ATM_IDT77252_RCV_ALL=y
CONFIG_ATM_IDT77252_USE_SUNI=y
CONFIG_ATM_AMBASSADOR=m
# CONFIG_ATM_AMBASSADOR_DEBUG is not set
CONFIG_ATM_HORIZON=m
# CONFIG_ATM_HORIZON_DEBUG is not set
CONFIG_ATM_IA=m
# CONFIG_ATM_IA_DEBUG is not set
CONFIG_ATM_FORE200E_MAYBE=m
CONFIG_ATM_FORE200E_PCA=y
CONFIG_ATM_FORE200E_PCA_DEFAULT_FW=y
CONFIG_ATM_FORE200E_USE_TASKLET=y
CONFIG_ATM_FORE200E_TX_RETRY=16
CONFIG_ATM_FORE200E_DEBUG=0
CONFIG_ATM_FORE200E=m
CONFIG_ATM_HE=m
CONFIG_ATM_HE_USE_SUNI=y
CONFIG_XEN_NETDEV_FRONTEND=y
CONFIG_FDDI=y
# CONFIG_DEFXX is not set
CONFIG_SKFP=m
CONFIG_HIPPI=y
CONFIG_ROADRUNNER=m
CONFIG_ROADRUNNER_LARGE_RINGS=y
CONFIG_PLIP=m
CONFIG_PPP=m
CONFIG_PPP_MULTILINK=y
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPP_MPPE=m
CONFIG_PPPOE=m
CONFIG_PPPOATM=m
CONFIG_PPPOL2TP=m
CONFIG_SLIP=m
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLHC=m
CONFIG_SLIP_SMART=y
CONFIG_SLIP_MODE_SLIP6=y
CONFIG_NET_FC=y
CONFIG_NETCONSOLE=m
CONFIG_NETCONSOLE_DYNAMIC=y
CONFIG_NETPOLL=y
CONFIG_NETPOLL_TRAP=y
CONFIG_NET_POLL_CONTROLLER=y
CONFIG_VIRTIO_NET=m
CONFIG_ISDN=m
CONFIG_ISDN_I4L=m
CONFIG_ISDN_PPP=y
CONFIG_ISDN_PPP_VJ=y
CONFIG_ISDN_MPP=y
CONFIG_IPPP_FILTER=y
CONFIG_ISDN_PPP_BSDCOMP=m
CONFIG_ISDN_AUDIO=y
CONFIG_ISDN_TTY_FAX=y
CONFIG_ISDN_X25=y
#
# ISDN feature submodules
#
CONFIG_ISDN_DIVERSION=m
#
# ISDN4Linux hardware drivers
#
#
# Passive cards
#
# CONFIG_ISDN_DRV_HISAX is not set
#
# Active cards
#
CONFIG_ISDN_DRV_GIGASET=m
CONFIG_GIGASET_BASE=m
CONFIG_GIGASET_M105=m
CONFIG_GIGASET_M101=m
CONFIG_GIGASET_DEBUG=y
CONFIG_GIGASET_UNDOCREQ=y
CONFIG_ISDN_CAPI=m
CONFIG_ISDN_DRV_AVMB1_VERBOSE_REASON=y
CONFIG_CAPI_TRACE=y
CONFIG_ISDN_CAPI_MIDDLEWARE=y
CONFIG_ISDN_CAPI_CAPI20=m
CONFIG_ISDN_CAPI_CAPIFS_BOOL=y
CONFIG_ISDN_CAPI_CAPIFS=m
CONFIG_ISDN_CAPI_CAPIDRV=m
#
# CAPI hardware drivers
#
# CONFIG_CAPI_AVM is not set
# CONFIG_CAPI_EICON is not set
CONFIG_PHONE=m
CONFIG_PHONE_IXJ=m
#
# Input device support
#
CONFIG_INPUT=y
CONFIG_INPUT_FF_MEMLESS=m
CONFIG_INPUT_POLLDEV=m
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=y
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
CONFIG_MOUSE_SERIAL=m
CONFIG_MOUSE_APPLETOUCH=m
# CONFIG_MOUSE_VSXXXAA is not set
CONFIG_INPUT_JOYSTICK=y
CONFIG_JOYSTICK_ANALOG=m
CONFIG_JOYSTICK_A3D=m
CONFIG_JOYSTICK_ADI=m
CONFIG_JOYSTICK_COBRA=m
CONFIG_JOYSTICK_GF2K=m
CONFIG_JOYSTICK_GRIP=m
CONFIG_JOYSTICK_GRIP_MP=m
CONFIG_JOYSTICK_GUILLEMOT=m
CONFIG_JOYSTICK_INTERACT=m
CONFIG_JOYSTICK_SIDEWINDER=m
CONFIG_JOYSTICK_TMDC=m
CONFIG_JOYSTICK_IFORCE=m
CONFIG_JOYSTICK_IFORCE_USB=y
CONFIG_JOYSTICK_IFORCE_232=y
CONFIG_JOYSTICK_WARRIOR=m
CONFIG_JOYSTICK_MAGELLAN=m
CONFIG_JOYSTICK_SPACEORB=m
CONFIG_JOYSTICK_SPACEBALL=m
CONFIG_JOYSTICK_STINGER=m
CONFIG_JOYSTICK_TWIDJOY=m
CONFIG_JOYSTICK_DB9=m
CONFIG_JOYSTICK_GAMECON=m
CONFIG_JOYSTICK_TURBOGRAFX=m
CONFIG_JOYSTICK_JOYDUMP=m
CONFIG_JOYSTICK_XPAD=m
# CONFIG_JOYSTICK_XPAD_FF is not set
# CONFIG_JOYSTICK_XPAD_LEDS is not set
CONFIG_INPUT_TABLET=y
CONFIG_TABLET_USB_ACECAD=m
CONFIG_TABLET_USB_AIPTEK=m
CONFIG_TABLET_USB_GTCO=m
CONFIG_TABLET_USB_KBTAB=m
CONFIG_TABLET_USB_WACOM=m
CONFIG_INPUT_TOUCHSCREEN=y
CONFIG_TOUCHSCREEN_ADS7846=m
CONFIG_TOUCHSCREEN_FUJITSU=m
CONFIG_TOUCHSCREEN_GUNZE=m
CONFIG_TOUCHSCREEN_ELO=m
CONFIG_TOUCHSCREEN_MTOUCH=m
CONFIG_TOUCHSCREEN_MK712=m
CONFIG_TOUCHSCREEN_PENMOUNT=m
CONFIG_TOUCHSCREEN_TOUCHRIGHT=m
CONFIG_TOUCHSCREEN_TOUCHWIN=m
CONFIG_TOUCHSCREEN_UCB1400=m
CONFIG_TOUCHSCREEN_USB_COMPOSITE=m
CONFIG_TOUCHSCREEN_USB_EGALAX=y
CONFIG_TOUCHSCREEN_USB_PANJIT=y
CONFIG_TOUCHSCREEN_USB_3M=y
CONFIG_TOUCHSCREEN_USB_ITM=y
CONFIG_TOUCHSCREEN_USB_ETURBO=y
CONFIG_TOUCHSCREEN_USB_GUNZE=y
CONFIG_TOUCHSCREEN_USB_DMC_TSC10=y
CONFIG_TOUCHSCREEN_USB_IRTOUCH=y
CONFIG_TOUCHSCREEN_USB_IDEALTEK=y
CONFIG_TOUCHSCREEN_USB_GENERAL_TOUCH=y
CONFIG_TOUCHSCREEN_USB_GOTOP=y
CONFIG_INPUT_MISC=y
CONFIG_INPUT_PCSPKR=y
# CONFIG_INPUT_APANEL is not set
CONFIG_INPUT_WISTRON_BTNS=m
CONFIG_INPUT_ATLAS_BTNS=m
CONFIG_INPUT_ATI_REMOTE=m
CONFIG_INPUT_ATI_REMOTE2=m
CONFIG_INPUT_KEYSPAN_REMOTE=m
CONFIG_INPUT_POWERMATE=m
CONFIG_INPUT_YEALINK=m
CONFIG_INPUT_UINPUT=m
#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=m
CONFIG_SERIO_CT82C710=m
CONFIG_SERIO_PARKBD=m
CONFIG_SERIO_PCIPS2=m
CONFIG_SERIO_LIBPS2=y
CONFIG_SERIO_RAW=m
CONFIG_GAMEPORT=m
CONFIG_GAMEPORT_NS558=m
CONFIG_GAMEPORT_L4=m
CONFIG_GAMEPORT_EMU10K1=m
CONFIG_GAMEPORT_FM801=m
#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
CONFIG_VT_HW_CONSOLE_BINDING=y
CONFIG_SERIAL_NONSTANDARD=y
CONFIG_COMPUTONE=m
CONFIG_ROCKETPORT=m
CONFIG_CYCLADES=m
CONFIG_CYZ_INTR=y
CONFIG_DIGIEPCA=m
CONFIG_MOXA_INTELLIO=m
CONFIG_MOXA_SMARTIO=m
CONFIG_ISI=m
CONFIG_SYNCLINK=m
CONFIG_SYNCLINKMP=m
CONFIG_SYNCLINK_GT=m
CONFIG_N_HDLC=m
CONFIG_RISCOM8=m
CONFIG_SPECIALIX=m
# CONFIG_SPECIALIX_RTSCTS is not set
CONFIG_SX=m
CONFIG_RIO=m
CONFIG_RIO_OLDPCI=y
CONFIG_STALDRV=y
# CONFIG_NOZOMI is not set
#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=8
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
CONFIG_SERIAL_8250_SHARE_IRQ=y
# CONFIG_SERIAL_8250_DETECT_IRQ is not set
CONFIG_SERIAL_8250_RSA=y
#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
CONFIG_SERIAL_JSM=m
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=64
CONFIG_PRINTER=m
# CONFIG_LP_CONSOLE is not set
CONFIG_PPDEV=m
CONFIG_HVC_DRIVER=y
CONFIG_HVC_XEN=y
CONFIG_IPMI_HANDLER=m
CONFIG_IPMI_PANIC_EVENT=y
CONFIG_IPMI_PANIC_STRING=y
CONFIG_IPMI_DEVICE_INTERFACE=m
CONFIG_IPMI_SI=m
CONFIG_IPMI_WATCHDOG=m
CONFIG_IPMI_POWEROFF=m
CONFIG_HW_RANDOM=y
CONFIG_HW_RANDOM_INTEL=m
CONFIG_HW_RANDOM_AMD=m
CONFIG_HW_RANDOM_GEODE=m
CONFIG_HW_RANDOM_VIA=m
CONFIG_NVRAM=m
CONFIG_RTC=y
CONFIG_R3964=m
CONFIG_APPLICOM=m
CONFIG_SONYPI=m
CONFIG_MWAVE=m
CONFIG_SCx200_GPIO=m
CONFIG_PC8736x_GPIO=m
CONFIG_NSC_GPIO=m
CONFIG_CS5535_GPIO=m
CONFIG_RAW_DRIVER=m
CONFIG_MAX_RAW_DEVS=4096
CONFIG_HPET=y
# CONFIG_HPET_RTC_IRQ is not set
CONFIG_HPET_MMAP=y
CONFIG_HANGCHECK_TIMER=m
CONFIG_TCG_TPM=m
CONFIG_TCG_TIS=m
CONFIG_TCG_NSC=m
CONFIG_TCG_ATMEL=m
CONFIG_TCG_INFINEON=m
CONFIG_TELCLOCK=m
CONFIG_DEVPORT=y
CONFIG_I2C=m
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_CHARDEV=m
#
# I2C Algorithms
#
CONFIG_I2C_ALGOBIT=m
CONFIG_I2C_ALGOPCF=m
CONFIG_I2C_ALGOPCA=m
#
# I2C Hardware Bus support
#
CONFIG_I2C_ALI1535=m
CONFIG_I2C_ALI1563=m
CONFIG_I2C_ALI15X3=m
CONFIG_I2C_AMD756=m
CONFIG_I2C_AMD756_S4882=m
CONFIG_I2C_AMD8111=m
CONFIG_I2C_I801=m
CONFIG_I2C_I810=m
CONFIG_I2C_PIIX4=m
CONFIG_I2C_NFORCE2=m
CONFIG_I2C_OCORES=m
CONFIG_I2C_PARPORT=m
CONFIG_I2C_PARPORT_LIGHT=m
CONFIG_I2C_PROSAVAGE=m
CONFIG_I2C_SAVAGE4=m
CONFIG_I2C_SIMTEC=m
CONFIG_SCx200_I2C=m
CONFIG_SCx200_I2C_SCL=12
CONFIG_SCx200_I2C_SDA=13
CONFIG_SCx200_ACB=m
CONFIG_I2C_SIS5595=m
CONFIG_I2C_SIS630=m
CONFIG_I2C_SIS96X=m
# CONFIG_I2C_TAOS_EVM is not set
CONFIG_I2C_STUB=m
CONFIG_I2C_TINY_USB=m
CONFIG_I2C_VIA=m
CONFIG_I2C_VIAPRO=m
CONFIG_I2C_VOODOO3=m
#
# Miscellaneous I2C Chip support
#
CONFIG_DS1682=m
CONFIG_SENSORS_EEPROM=m
CONFIG_SENSORS_PCF8574=m
CONFIG_PCF8575=m
CONFIG_SENSORS_PCF8591=m
CONFIG_TPS65010=m
CONFIG_SENSORS_MAX6875=m
CONFIG_SENSORS_TSL2550=m
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I2C_DEBUG_CHIP is not set
#
# SPI support
#
CONFIG_SPI=y
CONFIG_SPI_DEBUG=y
CONFIG_SPI_MASTER=y
#
# SPI Master Controller Drivers
#
CONFIG_SPI_BITBANG=m
# CONFIG_SPI_BUTTERFLY is not set
# CONFIG_SPI_LM70_LLP is not set
#
# SPI Protocol Masters
#
CONFIG_SPI_AT25=m
CONFIG_SPI_SPIDEV=m
CONFIG_SPI_TLE62X0=m
CONFIG_W1=m
CONFIG_W1_CON=y
#
# 1-wire Bus Masters
#
CONFIG_W1_MASTER_MATROX=m
CONFIG_W1_MASTER_DS2490=m
CONFIG_W1_MASTER_DS2482=m
#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=m
CONFIG_W1_SLAVE_SMEM=m
CONFIG_W1_SLAVE_DS2433=m
CONFIG_W1_SLAVE_DS2433_CRC=y
CONFIG_W1_SLAVE_DS2760=m
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_BATTERY_DS2760 is not set
CONFIG_HWMON=m
CONFIG_HWMON_VID=m
CONFIG_SENSORS_ABITUGURU=m
CONFIG_SENSORS_ABITUGURU3=m
CONFIG_SENSORS_AD7418=m
CONFIG_SENSORS_ADM1021=m
CONFIG_SENSORS_ADM1025=m
CONFIG_SENSORS_ADM1026=m
CONFIG_SENSORS_ADM1029=m
CONFIG_SENSORS_ADM1031=m
CONFIG_SENSORS_ADM9240=m
CONFIG_SENSORS_ADT7470=m
CONFIG_SENSORS_K8TEMP=m
CONFIG_SENSORS_ASB100=m
CONFIG_SENSORS_ATXP1=m
CONFIG_SENSORS_DS1621=m
CONFIG_SENSORS_I5K_AMB=m
CONFIG_SENSORS_F71805F=m
CONFIG_SENSORS_F71882FG=m
CONFIG_SENSORS_F75375S=m
CONFIG_SENSORS_FSCHER=m
CONFIG_SENSORS_FSCPOS=m
CONFIG_SENSORS_FSCHMD=m
CONFIG_SENSORS_GL518SM=m
CONFIG_SENSORS_GL520SM=m
CONFIG_SENSORS_CORETEMP=m
CONFIG_SENSORS_IBMPEX=m
CONFIG_SENSORS_IT87=m
CONFIG_SENSORS_LM63=m
CONFIG_SENSORS_LM70=m
CONFIG_SENSORS_LM75=m
CONFIG_SENSORS_LM77=m
CONFIG_SENSORS_LM78=m
CONFIG_SENSORS_LM80=m
CONFIG_SENSORS_LM83=m
CONFIG_SENSORS_LM85=m
CONFIG_SENSORS_LM87=m
CONFIG_SENSORS_LM90=m
CONFIG_SENSORS_LM92=m
CONFIG_SENSORS_LM93=m
CONFIG_SENSORS_MAX1619=m
CONFIG_SENSORS_MAX6650=m
CONFIG_SENSORS_PC87360=m
CONFIG_SENSORS_PC87427=m
CONFIG_SENSORS_SIS5595=m
CONFIG_SENSORS_DME1737=m
CONFIG_SENSORS_SMSC47M1=m
CONFIG_SENSORS_SMSC47M192=m
CONFIG_SENSORS_SMSC47B397=m
CONFIG_SENSORS_ADS7828=m
CONFIG_SENSORS_THMC50=m
CONFIG_SENSORS_VIA686A=m
CONFIG_SENSORS_VT1211=m
CONFIG_SENSORS_VT8231=m
CONFIG_SENSORS_W83781D=m
CONFIG_SENSORS_W83791D=m
CONFIG_SENSORS_W83792D=m
CONFIG_SENSORS_W83793=m
CONFIG_SENSORS_W83L785TS=m
CONFIG_SENSORS_W83L786NG=m
CONFIG_SENSORS_W83627HF=m
CONFIG_SENSORS_W83627EHF=m
CONFIG_SENSORS_HDAPS=m
CONFIG_SENSORS_APPLESMC=m
# CONFIG_HWMON_DEBUG_CHIP is not set
CONFIG_THERMAL=y
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_NOWAYOUT is not set
#
# Watchdog Device Drivers
#
CONFIG_SOFT_WATCHDOG=m
CONFIG_ACQUIRE_WDT=m
CONFIG_ADVANTECH_WDT=m
CONFIG_ALIM1535_WDT=m
CONFIG_ALIM7101_WDT=m
CONFIG_SC520_WDT=m
CONFIG_EUROTECH_WDT=m
CONFIG_IB700_WDT=m
CONFIG_IBMASR=m
CONFIG_WAFER_WDT=m
CONFIG_I6300ESB_WDT=m
CONFIG_ITCO_WDT=m
CONFIG_ITCO_VENDOR_SUPPORT=y
CONFIG_IT8712F_WDT=m
CONFIG_SC1200_WDT=m
CONFIG_SCx200_WDT=m
CONFIG_PC87413_WDT=m
CONFIG_60XX_WDT=m
CONFIG_SBC8360_WDT=m
CONFIG_SBC7240_WDT=m
CONFIG_CPU5_WDT=m
CONFIG_SMSC37B787_WDT=m
CONFIG_W83627HF_WDT=m
CONFIG_W83697HF_WDT=m
CONFIG_W83877F_WDT=m
CONFIG_W83977F_WDT=m
CONFIG_MACHZ_WDT=m
CONFIG_SBC_EPX_C3_WATCHDOG=m
#
# PCI-based Watchdog Cards
#
CONFIG_PCIPCWATCHDOG=m
CONFIG_WDTPCI=m
CONFIG_WDT_501_PCI=y
#
# USB-based Watchdog Cards
#
CONFIG_USBPCWATCHDOG=m
#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
CONFIG_SSB=m
CONFIG_SSB_PCIHOST_POSSIBLE=y
CONFIG_SSB_PCIHOST=y
# CONFIG_SSB_DEBUG is not set
CONFIG_SSB_DRIVER_PCICORE_POSSIBLE=y
CONFIG_SSB_DRIVER_PCICORE=y
#
# Multifunction device drivers
#
CONFIG_MFD_SM501=m
#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
# CONFIG_DAB is not set
#
# Graphics support
#
CONFIG_AGP=m
CONFIG_AGP_ALI=m
CONFIG_AGP_ATI=m
CONFIG_AGP_AMD=m
CONFIG_AGP_AMD64=m
CONFIG_AGP_INTEL=m
CONFIG_AGP_NVIDIA=m
CONFIG_AGP_SIS=m
CONFIG_AGP_SWORKS=m
CONFIG_AGP_VIA=m
CONFIG_AGP_EFFICEON=m
CONFIG_DRM=m
CONFIG_DRM_TDFX=m
CONFIG_DRM_R128=m
CONFIG_DRM_RADEON=m
CONFIG_DRM_I810=m
CONFIG_DRM_I830=m
CONFIG_DRM_I915=m
CONFIG_DRM_MGA=m
CONFIG_DRM_SIS=m
CONFIG_DRM_VIA=m
CONFIG_DRM_SAVAGE=m
CONFIG_VGASTATE=m
CONFIG_VIDEO_OUTPUT_CONTROL=m
CONFIG_FB=y
CONFIG_FIRMWARE_EDID=y
CONFIG_FB_DDC=m
CONFIG_FB_CFB_FILLRECT=y
CONFIG_FB_CFB_COPYAREA=y
CONFIG_FB_CFB_IMAGEBLIT=y
# CONFIG_FB_CFB_REV_PIXELS_IN_BYTE is not set
CONFIG_FB_SYS_FILLRECT=m
CONFIG_FB_SYS_COPYAREA=m
CONFIG_FB_SYS_IMAGEBLIT=m
CONFIG_FB_SYS_FOPS=m
CONFIG_FB_DEFERRED_IO=y
CONFIG_FB_SVGALIB=m
# CONFIG_FB_MACMODES is not set
CONFIG_FB_BACKLIGHT=y
CONFIG_FB_MODE_HELPERS=y
CONFIG_FB_TILEBLITTING=y
#
# Frame buffer hardware drivers
#
CONFIG_FB_CIRRUS=m
CONFIG_FB_PM2=m
CONFIG_FB_PM2_FIFO_DISCONNECT=y
CONFIG_FB_CYBER2000=m
CONFIG_FB_ARC=m
# CONFIG_FB_ASILIANT is not set
CONFIG_FB_IMSTT=y
CONFIG_FB_VGA16=m
CONFIG_FB_UVESA=m
CONFIG_FB_VESA=y
CONFIG_FB_EFI=y
CONFIG_FB_HECUBA=m
CONFIG_FB_HGA=m
CONFIG_FB_HGA_ACCEL=y
CONFIG_FB_S1D13XXX=m
CONFIG_FB_NVIDIA=m
CONFIG_FB_NVIDIA_I2C=y
# CONFIG_FB_NVIDIA_DEBUG is not set
CONFIG_FB_NVIDIA_BACKLIGHT=y
CONFIG_FB_RIVA=m
CONFIG_FB_RIVA_I2C=y
# CONFIG_FB_RIVA_DEBUG is not set
CONFIG_FB_RIVA_BACKLIGHT=y
CONFIG_FB_I810=m
CONFIG_FB_I810_GTF=y
CONFIG_FB_I810_I2C=y
CONFIG_FB_LE80578=m
CONFIG_FB_CARILLO_RANCH=m
CONFIG_FB_INTEL=m
# CONFIG_FB_INTEL_DEBUG is not set
CONFIG_FB_INTEL_I2C=y
CONFIG_FB_MATROX=y
CONFIG_FB_MATROX_MILLENIUM=y
CONFIG_FB_MATROX_MYSTIQUE=y
CONFIG_FB_MATROX_G=y
CONFIG_FB_MATROX_I2C=m
CONFIG_FB_MATROX_MAVEN=m
CONFIG_FB_MATROX_MULTIHEAD=y
CONFIG_FB_RADEON=m
CONFIG_FB_RADEON_I2C=y
CONFIG_FB_RADEON_BACKLIGHT=y
# CONFIG_FB_RADEON_DEBUG is not set
# CONFIG_FB_ATY128 is not set
CONFIG_FB_ATY=m
CONFIG_FB_ATY_CT=y
CONFIG_FB_ATY_GENERIC_LCD=y
CONFIG_FB_ATY_GX=y
CONFIG_FB_ATY_BACKLIGHT=y
CONFIG_FB_S3=m
CONFIG_FB_SAVAGE=m
CONFIG_FB_SAVAGE_I2C=y
CONFIG_FB_SAVAGE_ACCEL=y
CONFIG_FB_SIS=m
CONFIG_FB_SIS_300=y
CONFIG_FB_SIS_315=y
CONFIG_FB_NEOMAGIC=m
CONFIG_FB_KYRO=m
CONFIG_FB_3DFX=m
CONFIG_FB_3DFX_ACCEL=y
CONFIG_FB_VOODOO1=m
CONFIG_FB_VT8623=m
CONFIG_FB_CYBLA=m
CONFIG_FB_TRIDENT=m
CONFIG_FB_TRIDENT_ACCEL=y
CONFIG_FB_ARK=m
CONFIG_FB_PM3=m
CONFIG_FB_GEODE=y
CONFIG_FB_GEODE_LX=m
CONFIG_FB_GEODE_GX=m
# CONFIG_FB_GEODE_GX_SET_FBSIZE is not set
CONFIG_FB_GEODE_GX1=m
CONFIG_FB_SM501=m
# CONFIG_FB_VIRTUAL is not set
CONFIG_BACKLIGHT_LCD_SUPPORT=y
CONFIG_LCD_CLASS_DEVICE=m
CONFIG_LCD_LTV350QV=m
CONFIG_BACKLIGHT_CLASS_DEVICE=y
CONFIG_BACKLIGHT_CORGI=m
CONFIG_BACKLIGHT_PROGEAR=m
CONFIG_BACKLIGHT_CARILLO_RANCH=m
#
# Display device support
#
CONFIG_DISPLAY_SUPPORT=m
#
# Display hardware drivers
#
#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
CONFIG_VGACON_SOFT_SCROLLBACK=y
CONFIG_VGACON_SOFT_SCROLLBACK_SIZE=64
CONFIG_VIDEO_SELECT=y
CONFIG_DUMMY_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
CONFIG_FRAMEBUFFER_CONSOLE_DETECT_PRIMARY=y
CONFIG_FRAMEBUFFER_CONSOLE_ROTATION=y
# CONFIG_FONTS is not set
CONFIG_FONT_8x8=y
CONFIG_FONT_8x16=y
CONFIG_LOGO=y
CONFIG_LOGO_LINUX_MONO=y
CONFIG_LOGO_LINUX_VGA16=y
CONFIG_LOGO_LINUX_CLUT224=y
#
# Sound
#
CONFIG_SOUND=m
#
# Advanced Linux Sound Architecture
#
CONFIG_SND=m
CONFIG_SND_TIMER=m
CONFIG_SND_PCM=m
CONFIG_SND_HWDEP=m
CONFIG_SND_RAWMIDI=m
CONFIG_SND_SEQUENCER=m
CONFIG_SND_SEQ_DUMMY=m
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=m
CONFIG_SND_PCM_OSS=m
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
CONFIG_SND_RTCTIMER=m
CONFIG_SND_SEQ_RTCTIMER_DEFAULT=y
CONFIG_SND_DYNAMIC_MINORS=y
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
CONFIG_SND_VERBOSE_PRINTK=y
CONFIG_SND_DEBUG=y
# CONFIG_SND_DEBUG_DETECT is not set
# CONFIG_SND_PCM_XRUN_DEBUG is not set
#
# Generic devices
#
CONFIG_SND_MPU401_UART=m
CONFIG_SND_OPL3_LIB=m
CONFIG_SND_VX_LIB=m
CONFIG_SND_AC97_CODEC=m
CONFIG_SND_DUMMY=m
CONFIG_SND_VIRMIDI=m
CONFIG_SND_MTPAV=m
CONFIG_SND_MTS64=m
CONFIG_SND_SERIAL_U16550=m
CONFIG_SND_MPU401=m
CONFIG_SND_PORTMAN2X4=m
CONFIG_SND_SB_COMMON=m
CONFIG_SND_SB16_DSP=m
#
# PCI devices
#
CONFIG_SND_AD1889=m
CONFIG_SND_ALS300=m
CONFIG_SND_ALS4000=m
CONFIG_SND_ALI5451=m
CONFIG_SND_ATIIXP=m
CONFIG_SND_ATIIXP_MODEM=m
CONFIG_SND_AU8810=m
CONFIG_SND_AU8820=m
CONFIG_SND_AU8830=m
CONFIG_SND_AZT3328=m
CONFIG_SND_BT87X=m
# CONFIG_SND_BT87X_OVERCLOCK is not set
CONFIG_SND_CA0106=m
CONFIG_SND_CMIPCI=m
CONFIG_SND_OXYGEN_LIB=m
CONFIG_SND_OXYGEN=m
CONFIG_SND_CS4281=m
CONFIG_SND_CS46XX=m
CONFIG_SND_CS46XX_NEW_DSP=y
CONFIG_SND_CS5530=m
CONFIG_SND_CS5535AUDIO=m
CONFIG_SND_DARLA20=m
CONFIG_SND_GINA20=m
CONFIG_SND_LAYLA20=m
CONFIG_SND_DARLA24=m
CONFIG_SND_GINA24=m
CONFIG_SND_LAYLA24=m
CONFIG_SND_MONA=m
CONFIG_SND_MIA=m
CONFIG_SND_ECHO3G=m
CONFIG_SND_INDIGO=m
CONFIG_SND_INDIGOIO=m
CONFIG_SND_INDIGODJ=m
CONFIG_SND_EMU10K1=m
CONFIG_SND_EMU10K1X=m
CONFIG_SND_ENS1370=m
CONFIG_SND_ENS1371=m
CONFIG_SND_ES1938=m
CONFIG_SND_ES1968=m
CONFIG_SND_FM801=m
# CONFIG_SND_FM801_TEA575X_BOOL is not set
CONFIG_SND_HDA_INTEL=m
# CONFIG_SND_HDA_HWDEP is not set
CONFIG_SND_HDA_CODEC_REALTEK=y
CONFIG_SND_HDA_CODEC_ANALOG=y
CONFIG_SND_HDA_CODEC_SIGMATEL=y
CONFIG_SND_HDA_CODEC_VIA=y
CONFIG_SND_HDA_CODEC_ATIHDMI=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
# CONFIG_SND_HDA_POWER_SAVE is not set
CONFIG_SND_HDSP=m
CONFIG_SND_HDSPM=m
CONFIG_SND_HIFIER=m
CONFIG_SND_ICE1712=m
CONFIG_SND_ICE1724=m
CONFIG_SND_INTEL8X0=m
CONFIG_SND_INTEL8X0M=m
CONFIG_SND_KORG1212=m
# CONFIG_SND_KORG1212_FIRMWARE_IN_KERNEL is not set
CONFIG_SND_MAESTRO3=m
# CONFIG_SND_MAESTRO3_FIRMWARE_IN_KERNEL is not set
CONFIG_SND_MIXART=m
CONFIG_SND_NM256=m
CONFIG_SND_PCXHR=m
CONFIG_SND_RIPTIDE=m
CONFIG_SND_RME32=m
CONFIG_SND_RME96=m
CONFIG_SND_RME9652=m
CONFIG_SND_SIS7019=m
CONFIG_SND_SONICVIBES=m
CONFIG_SND_TRIDENT=m
CONFIG_SND_VIA82XX=m
CONFIG_SND_VIA82XX_MODEM=m
CONFIG_SND_VIRTUOSO=m
CONFIG_SND_VX222=m
CONFIG_SND_YMFPCI=m
# CONFIG_SND_YMFPCI_FIRMWARE_IN_KERNEL is not set
CONFIG_SND_AC97_POWER_SAVE=y
CONFIG_SND_AC97_POWER_SAVE_DEFAULT=0
#
# SPI devices
#
#
# USB devices
#
CONFIG_SND_USB_AUDIO=m
CONFIG_SND_USB_USX2Y=m
CONFIG_SND_USB_CAIAQ=m
CONFIG_SND_USB_CAIAQ_INPUT=y
#
# System on Chip audio support
#
# CONFIG_SND_SOC is not set
#
# SoC Audio support for SuperH
#
#
# ALSA SoC audio for Freescale SOCs
#
#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set
CONFIG_AC97_BUS=m
CONFIG_HID_SUPPORT=y
CONFIG_HID=m
# CONFIG_HID_DEBUG is not set
CONFIG_HIDRAW=y
#
# USB Input Devices
#
CONFIG_USB_HID=m
CONFIG_USB_HIDINPUT_POWERBOOK=y
CONFIG_HID_FF=y
CONFIG_HID_PID=y
CONFIG_LOGITECH_FF=y
CONFIG_PANTHERLORD_FF=y
CONFIG_THRUSTMASTER_FF=y
CONFIG_ZEROPLUS_FF=y
CONFIG_USB_HIDDEV=y
#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=m
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_DEVICE_CLASS is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
CONFIG_USB_SUSPEND=y
# CONFIG_USB_PERSIST is not set
# CONFIG_USB_OTG is not set
#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=m
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_ISP116X_HCD=m
CONFIG_USB_OHCI_HCD=m
CONFIG_USB_OHCI_HCD_SSB=y
# CONFIG_USB_OHCI_BIG_ENDIAN_DESC is not set
# CONFIG_USB_OHCI_BIG_ENDIAN_MMIO is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_UHCI_HCD=m
CONFIG_USB_U132_HCD=m
CONFIG_USB_SL811_HCD=m
CONFIG_USB_R8A66597_HCD=m
#
# USB Device Class drivers
#
CONFIG_USB_ACM=m
CONFIG_USB_PRINTER=m
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=m
# CONFIG_USB_STORAGE_DEBUG is not set
CONFIG_USB_STORAGE_DATAFAB=y
CONFIG_USB_STORAGE_FREECOM=y
CONFIG_USB_STORAGE_ISD200=y
CONFIG_USB_STORAGE_DPCM=y
CONFIG_USB_STORAGE_USBAT=y
CONFIG_USB_STORAGE_SDDR09=y
CONFIG_USB_STORAGE_SDDR55=y
CONFIG_USB_STORAGE_JUMPSHOT=y
CONFIG_USB_STORAGE_ALAUDA=y
CONFIG_USB_STORAGE_KARMA=y
CONFIG_USB_LIBUSUAL=y
#
# USB Imaging devices
#
CONFIG_USB_MDC800=m
CONFIG_USB_MICROTEK=m
CONFIG_USB_MON=y
#
# USB port drivers
#
CONFIG_USB_USS720=m
CONFIG_USB_SERIAL=m
CONFIG_USB_EZUSB=y
CONFIG_USB_SERIAL_GENERIC=y
CONFIG_USB_SERIAL_AIRCABLE=m
CONFIG_USB_SERIAL_AIRPRIME=m
CONFIG_USB_SERIAL_ARK3116=m
CONFIG_USB_SERIAL_BELKIN=m
CONFIG_USB_SERIAL_CH341=m
CONFIG_USB_SERIAL_WHITEHEAT=m
CONFIG_USB_SERIAL_DIGI_ACCELEPORT=m
CONFIG_USB_SERIAL_CP2101=m
CONFIG_USB_SERIAL_CYPRESS_M8=m
CONFIG_USB_SERIAL_EMPEG=m
CONFIG_USB_SERIAL_FTDI_SIO=m
CONFIG_USB_SERIAL_FUNSOFT=m
CONFIG_USB_SERIAL_VISOR=m
CONFIG_USB_SERIAL_IPAQ=m
CONFIG_USB_SERIAL_IR=m
CONFIG_USB_SERIAL_EDGEPORT=m
CONFIG_USB_SERIAL_EDGEPORT_TI=m
CONFIG_USB_SERIAL_GARMIN=m
CONFIG_USB_SERIAL_IPW=m
# CONFIG_USB_SERIAL_IUU is not set
CONFIG_USB_SERIAL_KEYSPAN_PDA=m
CONFIG_USB_SERIAL_KEYSPAN=m
CONFIG_USB_SERIAL_KEYSPAN_MPR=y
CONFIG_USB_SERIAL_KEYSPAN_USA28=y
CONFIG_USB_SERIAL_KEYSPAN_USA28X=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XA=y
CONFIG_USB_SERIAL_KEYSPAN_USA28XB=y
CONFIG_USB_SERIAL_KEYSPAN_USA19=y
CONFIG_USB_SERIAL_KEYSPAN_USA18X=y
CONFIG_USB_SERIAL_KEYSPAN_USA19W=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QW=y
CONFIG_USB_SERIAL_KEYSPAN_USA19QI=y
CONFIG_USB_SERIAL_KEYSPAN_USA49W=y
CONFIG_USB_SERIAL_KEYSPAN_USA49WLC=y
CONFIG_USB_SERIAL_KLSI=m
CONFIG_USB_SERIAL_KOBIL_SCT=m
CONFIG_USB_SERIAL_MCT_U232=m
CONFIG_USB_SERIAL_MOS7720=m
CONFIG_USB_SERIAL_MOS7840=m
CONFIG_USB_SERIAL_NAVMAN=m
CONFIG_USB_SERIAL_PL2303=m
CONFIG_USB_SERIAL_OTI6858=m
CONFIG_USB_SERIAL_HP4X=m
CONFIG_USB_SERIAL_SAFE=m
CONFIG_USB_SERIAL_SAFE_PADDED=y
CONFIG_USB_SERIAL_SIERRAWIRELESS=m
CONFIG_USB_SERIAL_TI=m
CONFIG_USB_SERIAL_CYBERJACK=m
CONFIG_USB_SERIAL_XIRCOM=m
CONFIG_USB_SERIAL_OPTION=m
CONFIG_USB_SERIAL_OMNINET=m
CONFIG_USB_SERIAL_DEBUG=m
#
# USB Miscellaneous drivers
#
CONFIG_USB_EMI62=m
CONFIG_USB_EMI26=m
CONFIG_USB_ADUTUX=m
CONFIG_USB_AUERSWALD=m
CONFIG_USB_RIO500=m
CONFIG_USB_LEGOTOWER=m
CONFIG_USB_LCD=m
CONFIG_USB_BERRY_CHARGE=m
CONFIG_USB_LED=m
CONFIG_USB_CYPRESS_CY7C63=m
CONFIG_USB_CYTHERM=m
CONFIG_USB_PHIDGET=m
CONFIG_USB_PHIDGETKIT=m
CONFIG_USB_PHIDGETMOTORCONTROL=m
CONFIG_USB_PHIDGETSERVO=m
CONFIG_USB_IDMOUSE=m
CONFIG_USB_FTDI_ELAN=m
CONFIG_USB_APPLEDISPLAY=m
CONFIG_USB_SISUSBVGA=m
CONFIG_USB_SISUSBVGA_CON=y
CONFIG_USB_LD=m
CONFIG_USB_TRANCEVIBRATOR=m
CONFIG_USB_IOWARRIOR=m
# CONFIG_USB_TEST is not set
CONFIG_USB_ATM=m
CONFIG_USB_SPEEDTOUCH=m
CONFIG_USB_CXACRU=m
CONFIG_USB_UEAGLEATM=m
CONFIG_USB_XUSBATM=m
# CONFIG_USB_GADGET is not set
CONFIG_MMC=m
# CONFIG_MMC_DEBUG is not set
# CONFIG_MMC_UNSAFE_RESUME is not set
#
# MMC/SD Card Drivers
#
CONFIG_MMC_BLOCK=m
CONFIG_MMC_BLOCK_BOUNCE=y
CONFIG_SDIO_UART=m
#
# MMC/SD Host Controller Drivers
#
CONFIG_MMC_SDHCI=m
# CONFIG_MMC_RICOH_MMC is not set
CONFIG_MMC_WBSD=m
CONFIG_MMC_TIFM_SD=m
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=m
#
# LED drivers
#
CONFIG_LEDS_NET48XX=m
CONFIG_LEDS_WRAP=m
# CONFIG_LEDS_CLEVO_MAIL is not set
#
# LED Triggers
#
CONFIG_LEDS_TRIGGERS=y
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=m
CONFIG_RTC_CLASS=m
#
# Conflicting RTC option has been selected, check GEN_RTC and RTC
#
#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_TEST=m
#
# I2C RTC drivers
#
CONFIG_RTC_DRV_DS1307=m
CONFIG_RTC_DRV_DS1374=m
CONFIG_RTC_DRV_DS1672=m
CONFIG_RTC_DRV_MAX6900=m
CONFIG_RTC_DRV_RS5C372=m
CONFIG_RTC_DRV_ISL1208=m
CONFIG_RTC_DRV_X1205=m
CONFIG_RTC_DRV_PCF8563=m
CONFIG_RTC_DRV_PCF8583=m
CONFIG_RTC_DRV_M41T80=m
CONFIG_RTC_DRV_M41T80_WDT=y
#
# SPI RTC drivers
#
CONFIG_RTC_DRV_MAX6902=m
CONFIG_RTC_DRV_R9701=m
CONFIG_RTC_DRV_RS5C348=m
#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=m
CONFIG_RTC_DRV_DS1511=m
CONFIG_RTC_DRV_DS1553=m
CONFIG_RTC_DRV_DS1742=m
CONFIG_RTC_DRV_STK17TA8=m
CONFIG_RTC_DRV_M48T86=m
CONFIG_RTC_DRV_M48T59=m
CONFIG_RTC_DRV_V3020=m
#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y
#
# DMA Devices
#
CONFIG_INTEL_IOATDMA=m
CONFIG_DMA_ENGINE=y
#
# DMA Clients
#
CONFIG_NET_DMA=y
CONFIG_DCA=m
# CONFIG_AUXDISPLAY is not set
#
# Userspace I/O
#
CONFIG_UIO=m
CONFIG_UIO_CIF=m
#
# Firmware Drivers
#
CONFIG_EDD=m
CONFIG_DELL_RBU=m
CONFIG_DCDBAS=m
CONFIG_DMIID=y
#
# File systems
#
CONFIG_EXT2_FS=m
CONFIG_EXT2_FS_XATTR=y
CONFIG_EXT2_FS_POSIX_ACL=y
CONFIG_EXT2_FS_SECURITY=y
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=m
CONFIG_EXT3_FS_XATTR=y
CONFIG_EXT3_FS_POSIX_ACL=y
CONFIG_EXT3_FS_SECURITY=y
CONFIG_EXT4DEV_FS=m
CONFIG_EXT4DEV_FS_XATTR=y
CONFIG_EXT4DEV_FS_POSIX_ACL=y
CONFIG_EXT4DEV_FS_SECURITY=y
CONFIG_JBD=m
CONFIG_JBD_DEBUG=y
CONFIG_JBD2=m
CONFIG_JBD2_DEBUG=y
CONFIG_FS_MBCACHE=m
CONFIG_REISERFS_FS=m
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
CONFIG_REISERFS_FS_XATTR=y
CONFIG_REISERFS_FS_POSIX_ACL=y
CONFIG_REISERFS_FS_SECURITY=y
CONFIG_JFS_FS=m
CONFIG_JFS_POSIX_ACL=y
CONFIG_JFS_SECURITY=y
# CONFIG_JFS_DEBUG is not set
CONFIG_JFS_STATISTICS=y
CONFIG_FS_POSIX_ACL=y
CONFIG_XFS_FS=m
CONFIG_XFS_QUOTA=y
CONFIG_XFS_SECURITY=y
CONFIG_XFS_POSIX_ACL=y
CONFIG_XFS_RT=y
CONFIG_GFS2_FS=m
CONFIG_GFS2_FS_LOCKING_NOLOCK=m
CONFIG_GFS2_FS_LOCKING_DLM=m
CONFIG_OCFS2_FS=m
CONFIG_OCFS2_DEBUG_MASKLOG=y
# CONFIG_OCFS2_DEBUG_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
CONFIG_QUOTA=y
CONFIG_QUOTA_NETLINK_INTERFACE=y
CONFIG_PRINT_QUOTA_WARNING=y
CONFIG_QFMT_V1=m
CONFIG_QFMT_V2=m
CONFIG_QUOTACTL=y
CONFIG_AUTOFS_FS=m
CONFIG_AUTOFS4_FS=m
CONFIG_FUSE_FS=m
CONFIG_GENERIC_ACL=y
#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m
CONFIG_UDF_NLS=y
#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=m
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
CONFIG_NTFS_FS=m
# CONFIG_NTFS_DEBUG is not set
CONFIG_NTFS_RW=y
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
CONFIG_TMPFS_POSIX_ACL=y
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_CONFIGFS_FS=m
#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_CRAMFS=m
CONFIG_VXFS_FS=m
CONFIG_MINIX_FS=y
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
CONFIG_ROMFS_FS=m
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
CONFIG_NFS_V3_ACL=y
CONFIG_NFS_V4=y
CONFIG_NFS_DIRECTIO=y
CONFIG_NFSD=m
CONFIG_NFSD_V2_ACL=y
CONFIG_NFSD_V3=y
CONFIG_NFSD_V3_ACL=y
CONFIG_NFSD_V4=y
CONFIG_NFSD_TCP=y
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_EXPORTFS=m
CONFIG_NFS_ACL_SUPPORT=m
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=m
CONFIG_SUNRPC_GSS=m
# CONFIG_SUNRPC_BIND34 is not set
CONFIG_RPCSEC_GSS_KRB5=m
CONFIG_RPCSEC_GSS_SPKM3=m
# CONFIG_SMB_FS is not set
CONFIG_CIFS=m
CONFIG_CIFS_STATS=y
CONFIG_CIFS_STATS2=y
CONFIG_CIFS_WEAK_PW_HASH=y
CONFIG_CIFS_XATTR=y
CONFIG_CIFS_POSIX=y
# CONFIG_CIFS_DEBUG2 is not set
# CONFIG_CIFS_EXPERIMENTAL is not set
# CONFIG_NCP_FS is not set
CONFIG_CODA_FS=m
# CONFIG_CODA_FS_OLD_API is not set
# CONFIG_AFS_FS is not set
#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
# CONFIG_MAC_PARTITION is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_BSD_DISKLABEL=y
# CONFIG_MINIX_SUBPARTITION is not set
CONFIG_SOLARIS_X86_PARTITION=y
CONFIG_UNIXWARE_DISKLABEL=y
CONFIG_LDM_PARTITION=y
# CONFIG_LDM_DEBUG is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
CONFIG_KARMA_PARTITION=y
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="utf8"
CONFIG_NLS_CODEPAGE_437=m
CONFIG_NLS_CODEPAGE_737=m
CONFIG_NLS_CODEPAGE_775=m
CONFIG_NLS_CODEPAGE_850=m
CONFIG_NLS_CODEPAGE_852=m
CONFIG_NLS_CODEPAGE_855=m
CONFIG_NLS_CODEPAGE_857=m
CONFIG_NLS_CODEPAGE_860=m
CONFIG_NLS_CODEPAGE_861=m
CONFIG_NLS_CODEPAGE_862=m
CONFIG_NLS_CODEPAGE_863=m
CONFIG_NLS_CODEPAGE_864=m
CONFIG_NLS_CODEPAGE_865=m
CONFIG_NLS_CODEPAGE_866=m
CONFIG_NLS_CODEPAGE_869=m
CONFIG_NLS_CODEPAGE_936=m
CONFIG_NLS_CODEPAGE_950=m
CONFIG_NLS_CODEPAGE_932=m
CONFIG_NLS_CODEPAGE_949=m
CONFIG_NLS_CODEPAGE_874=m
CONFIG_NLS_ISO8859_8=m
CONFIG_NLS_CODEPAGE_1250=m
CONFIG_NLS_CODEPAGE_1251=m
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
CONFIG_NLS_ISO8859_3=m
CONFIG_NLS_ISO8859_4=m
CONFIG_NLS_ISO8859_5=m
CONFIG_NLS_ISO8859_6=m
CONFIG_NLS_ISO8859_7=m
CONFIG_NLS_ISO8859_9=m
CONFIG_NLS_ISO8859_13=m
CONFIG_NLS_ISO8859_14=m
CONFIG_NLS_ISO8859_15=m
CONFIG_NLS_KOI8_R=m
CONFIG_NLS_KOI8_U=m
CONFIG_NLS_UTF8=m
CONFIG_DLM=m
# CONFIG_DLM_DEBUG is not set
#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_DEBUG_SHIRQ is not set
CONFIG_DETECT_SOFTLOCKUP=y
CONFIG_SCHED_DEBUG=y
CONFIG_SCHEDSTATS=y
CONFIG_TIMER_STATS=y
# CONFIG_SLUB_DEBUG_ON is not set
# CONFIG_SLUB_STATS is not set
CONFIG_DEBUG_PREEMPT=y
CONFIG_DEBUG_RT_MUTEXES=y
CONFIG_DEBUG_PI_LIST=y
# CONFIG_RT_MUTEX_TESTER is not set
CONFIG_DEBUG_SPINLOCK=y
CONFIG_DEBUG_MUTEXES=y
CONFIG_DEBUG_LOCK_ALLOC=y
CONFIG_PROVE_LOCKING=y
CONFIG_LOCKDEP=y
CONFIG_LOCK_STAT=y
# CONFIG_DEBUG_LOCKDEP is not set
CONFIG_TRACE_IRQFLAGS=y
CONFIG_DEBUG_SPINLOCK_SLEEP=y
CONFIG_DEBUG_LOCKING_API_SELFTESTS=y
CONFIG_STACKTRACE=y
# CONFIG_DEBUG_KOBJECT is not set
# CONFIG_DEBUG_HIGHMEM is not set
CONFIG_DEBUG_BUGVERBOSE=y
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_SG is not set
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
CONFIG_RCU_TORTURE_TEST=m
CONFIG_KPROBES_SANITY_TEST=y
# CONFIG_BACKTRACE_SELF_TEST is not set
CONFIG_LKDTM=m
CONFIG_FAULT_INJECTION=y
CONFIG_FAILSLAB=y
CONFIG_FAIL_PAGE_ALLOC=y
CONFIG_FAIL_MAKE_REQUEST=y
CONFIG_FAULT_INJECTION_DEBUG_FS=y
CONFIG_FAULT_INJECTION_STACKTRACE_FILTER=y
CONFIG_LATENCYTOP=y
CONFIG_PROVIDE_OHCI1394_DMA_INIT=y
# CONFIG_SAMPLES is not set
CONFIG_EARLY_PRINTK=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACK_USAGE=y
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_DEBUG_RODATA=y
# CONFIG_DEBUG_RODATA_TEST is not set
# CONFIG_DEBUG_NX_TEST is not set
CONFIG_4KSTACKS=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
CONFIG_DOUBLEFAULT=y
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
CONFIG_IO_DELAY_0X80=y
# CONFIG_IO_DELAY_0XED is not set
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=0
CONFIG_DEBUG_BOOT_PARAMS=y
CONFIG_CPA_DEBUG=y
#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_DEBUG_PROC_KEYS=y
CONFIG_SECURITY=y
CONFIG_SECURITY_NETWORK=y
CONFIG_SECURITY_NETWORK_XFRM=y
CONFIG_SECURITY_CAPABILITIES=y
CONFIG_SECURITY_FILE_CAPABILITIES=y
CONFIG_SECURITY_DEFAULT_MMAP_MIN_ADDR=0
# CONFIG_SECURITY_SELINUX is not set
# CONFIG_SECURITY_SMACK is not set
CONFIG_XOR_BLOCKS=m
CONFIG_ASYNC_CORE=m
CONFIG_ASYNC_MEMCPY=m
CONFIG_ASYNC_XOR=m
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_AEAD=m
CONFIG_CRYPTO_BLKCIPHER=m
CONFIG_CRYPTO_SEQIV=m
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_HMAC=y
CONFIG_CRYPTO_XCBC=m
CONFIG_CRYPTO_NULL=m
CONFIG_CRYPTO_MD4=m
CONFIG_CRYPTO_MD5=y
CONFIG_CRYPTO_SHA1=m
CONFIG_CRYPTO_SHA256=m
CONFIG_CRYPTO_SHA512=m
CONFIG_CRYPTO_WP512=m
CONFIG_CRYPTO_TGR192=m
CONFIG_CRYPTO_GF128MUL=m
CONFIG_CRYPTO_ECB=m
CONFIG_CRYPTO_CBC=m
CONFIG_CRYPTO_PCBC=m
CONFIG_CRYPTO_LRW=m
CONFIG_CRYPTO_XTS=m
CONFIG_CRYPTO_CTR=m
CONFIG_CRYPTO_GCM=m
CONFIG_CRYPTO_CCM=m
CONFIG_CRYPTO_CRYPTD=m
CONFIG_CRYPTO_DES=m
CONFIG_CRYPTO_FCRYPT=m
CONFIG_CRYPTO_BLOWFISH=m
# CONFIG_CRYPTO_TWOFISH is not set
CONFIG_CRYPTO_TWOFISH_COMMON=m
CONFIG_CRYPTO_TWOFISH_586=m
CONFIG_CRYPTO_SERPENT=m
CONFIG_CRYPTO_AES=m
CONFIG_CRYPTO_AES_586=m
CONFIG_CRYPTO_CAST5=m
CONFIG_CRYPTO_CAST6=m
CONFIG_CRYPTO_TEA=m
CONFIG_CRYPTO_ARC4=m
CONFIG_CRYPTO_KHAZAD=m
CONFIG_CRYPTO_ANUBIS=m
CONFIG_CRYPTO_SEED=m
CONFIG_CRYPTO_SALSA20=m
CONFIG_CRYPTO_SALSA20_586=m
CONFIG_CRYPTO_DEFLATE=m
CONFIG_CRYPTO_MICHAEL_MIC=m
CONFIG_CRYPTO_CRC32C=m
CONFIG_CRYPTO_CAMELLIA=m
CONFIG_CRYPTO_TEST=m
CONFIG_CRYPTO_AUTHENC=m
CONFIG_CRYPTO_LZO=m
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_PADLOCK=m
CONFIG_CRYPTO_DEV_PADLOCK_AES=m
CONFIG_CRYPTO_DEV_PADLOCK_SHA=m
CONFIG_CRYPTO_DEV_GEODE=m
CONFIG_CRYPTO_DEV_HIFN_795X=m
CONFIG_CRYPTO_DEV_HIFN_795X_RNG=y
CONFIG_HAVE_KVM=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=m
CONFIG_KVM_INTEL=m
CONFIG_KVM_AMD=m
# CONFIG_LGUEST is not set
CONFIG_VIRTIO=m
CONFIG_VIRTIO_RING=m
CONFIG_VIRTIO_PCI=m
CONFIG_VIRTIO_BALLOON=m
#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_CRC_CCITT=m
CONFIG_CRC16=m
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
CONFIG_CRC7=m
CONFIG_LIBCRC32C=m
CONFIG_AUDIT_GENERIC=y
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=m
CONFIG_LZO_COMPRESS=m
CONFIG_LZO_DECOMPRESS=m
CONFIG_TEXTSEARCH=y
CONFIG_TEXTSEARCH_KMP=m
CONFIG_TEXTSEARCH_BM=m
CONFIG_TEXTSEARCH_FSM=m
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_CHECK_SIGNATURE=y
On Sat, 16 Feb 2008 20:14:30 +0100
Tilman Schmidt <[email protected]> wrote:
> 2.6.25-rc2 fails to bring up my openSUSE 10.3 PC because LVM
> cannot find the volume group containing the root file system.
> 2.6.25-rc1 has the same problem, 2.6.24 works fine.
Compile in SCSI disk support. Modular even if loaded in initrd it seems
to have broken somewhere.
On Feb 15, 2008 10:23 PM, Linus Torvalds <[email protected]> wrote:
>
> Ok,
> this kernel is a winner.
Sadly not for me:
[ 5282.056415] ------------[ cut here ]------------
[ 5282.059757] kernel BUG at lib/list_debug.c:33!
[ 5282.062055] invalid opcode: 0000 [1] SMP
[ 5282.062055] CPU 3
[ 5282.062055] Modules linked in: radeon drm w83792d ipv6 tuner
tea5767 tda8290 tuner_xc2028 tda9887 tuner_simple mt20xx tea5761
tvaudio msp3400 bttv videodev v4l1_compat ir_common compat_ioctl32
v4l2_common videobuf_dma_sg videobuf_core btcx_risc tveeprom usbhid
pata_amd i2c_nforce2 hid sg
[ 5282.062055] Pid: 12937, comm: sed Not tainted 2.6.25-rc2 #1
[ 5282.062055] RIP: 0010:[<ffffffff803bffe4>]
-> then the output from the serial console stopped. I was in X, so I
could not see, if there was anything more on the real console.
(gdb) list *0xffffffff803bffe4
0xffffffff803bffe4 is in __list_add (lib/list_debug.c:33).
28 }
29 if (unlikely(prev->next != next)) {
30 printk(KERN_ERR "list_add corruption.
prev->next should be "
31 "next (%p), but was %p. (prev=%p).\n",
32 next, prev->next, prev);
33 BUG();
34 }
35 next->prev = new;
36 new->next = next;
37 new->prev = prev;
For more on this problem see http://marc.info/?l=linux-kernel&m=120293042005445
I will now try 2.6.25-rc2-mm1.
Torsten
On 02/16/2008 09:12 PM, Alan Cox wrote:
> On Sat, 16 Feb 2008 20:14:30 +0100
> Tilman Schmidt <[email protected]> wrote:
>
>> 2.6.25-rc2 fails to bring up my openSUSE 10.3 PC because LVM
>> cannot find the volume group containing the root file system.
>> 2.6.25-rc1 has the same problem, 2.6.24 works fine.
>
> Compile in SCSI disk support. Modular even if loaded in initrd it seems
> to have broken somewhere.
# CONFIG_SYSFS_DEPRECATED is not set
I would suspect this.
Try to upgrade to at least lvm 2.02.29 (I guess this is the first version which
understands the new sysfs layout).
On Sat, Feb 16 2008, Kamalesh Babulal wrote:
> Hi,
>
> The softlockup is seen from 2.6.25-rc1-git{1,3} and is visible in the 2.6.24-rc2 kernel,
> While booting up with the 2.6.25-rc1-git{1,3} and 2.6.25-rc2 kernel(s) on the powerbox
>
> Loading st.ko module
> BUG: soft lockup - CPU#1 stuck for 61s! [insmod:379]
> NIP: c0000000001b0620 LR: c0000000001a5dcc CTR: 0000000000000040
> REGS: c00000077caab8a0 TRAP: 0901 Not tainted (2.6.25-rc2-autotest)
> MSR: 8000000000009032 <EE,ME,IR,DR> CR: 84004088 XER: 20000000
> TASK = c00000077cb450a0[379] 'insmod' THREAD: c00000077caa8000 CPU: 1
> GPR00: c00000077c9d4000 c00000077caabb20 c000000000538a40 000000000000000b
> GPR04: ffc0000000000000 c00000077e0c0000 0000000000000036 000000000000000a
> GPR08: 0040000000000000 c00000077c9d4250 c000000000000000 0000000000000000
> GPR12: c00000077c9d4230 c000000000481d00
> NIP [c0000000001b0620] .radix_tree_gang_lookup+0x100/0x1e4
> LR [c0000000001a5dcc] .call_for_each_cic+0x50/0x10c
> Call Trace:
> [c00000077caabb20] [c0000000001a5e2c] .call_for_each_cic+0xb0/0x10c (unreliable)
> [c00000077caabc60] [c00000000019dba4] .exit_io_context+0xf0/0x110
> [c00000077caabcf0] [c000000000061e38] .do_exit+0x820/0x850
> [c00000077caabda0] [c000000000061f34] .do_group_exit+0xcc/0xe8
> [c00000077caabe30] [c00000000000872c] syscall_exit+0x0/0x40
> Instruction dump:
> 7d296214 39290018 e8090000 7caa2038 39290008 2fa00000 409e0018 7caa4215
> 396b0001 418200cc 424000b8 4bffffdc <79691f24> 7d296214 e9690018 2fab0000
It's odd stuff. Could you perhaps try and add some printks to
block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
from radix_tree_gang_lookup() and the pointer value of cics[i] in the
for() loop after the lookup?
How many SCSI devices are online?
--
Jens Axboe
On Saturday, 16 of February 2008, Kamalesh Babulal wrote:
> Hi,
Hi,
> The softlockup is seen from 2.6.25-rc1-git{1,3} and is visible in the 2.6.24-rc2 kernel,
> While booting up with the 2.6.25-rc1-git{1,3} and 2.6.25-rc2 kernel(s) on the powerbox
Can you update the Bugzilla entry at:
http://bugzilla.kernel.org/show_bug.cgi?id=9948
with the above information, please?
Rafael
> Loading st.ko module
> BUG: soft lockup - CPU#1 stuck for 61s! [insmod:379]
> NIP: c0000000001b0620 LR: c0000000001a5dcc CTR: 0000000000000040
> REGS: c00000077caab8a0 TRAP: 0901 Not tainted (2.6.25-rc2-autotest)
> MSR: 8000000000009032 <EE,ME,IR,DR> CR: 84004088 XER: 20000000
> TASK = c00000077cb450a0[379] 'insmod' THREAD: c00000077caa8000 CPU: 1
> GPR00: c00000077c9d4000 c00000077caabb20 c000000000538a40 000000000000000b
> GPR04: ffc0000000000000 c00000077e0c0000 0000000000000036 000000000000000a
> GPR08: 0040000000000000 c00000077c9d4250 c000000000000000 0000000000000000
> GPR12: c00000077c9d4230 c000000000481d00
> NIP [c0000000001b0620] .radix_tree_gang_lookup+0x100/0x1e4
> LR [c0000000001a5dcc] .call_for_each_cic+0x50/0x10c
> Call Trace:
> [c00000077caabb20] [c0000000001a5e2c] .call_for_each_cic+0xb0/0x10c (unreliable)
> [c00000077caabc60] [c00000000019dba4] .exit_io_context+0xf0/0x110
> [c00000077caabcf0] [c000000000061e38] .do_exit+0x820/0x850
> [c00000077caabda0] [c000000000061f34] .do_group_exit+0xcc/0xe8
> [c00000077caabe30] [c00000000000872c] syscall_exit+0x0/0x40
> Instruction dump:
> 7d296214 39290018 e8090000 7caa2038 39290008 2fa00000 409e0018 7caa4215
> 396b0001 418200cc 424000b8 4bffffdc <79691f24> 7d296214 e9690018 2fab0000
> INFO: task insmod:387 blocked for more than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> insmod D 000000001000e144 12144 387 1
> Call Trace:
> [c00000077cb97600] [c0000000008fae80] 0xc0000000008fae80 (unreliable)
> [c00000077cb977d0] [c000000000010c7c] .__switch_to+0x11c/0x154
> [c00000077cb97860] [c000000000344498] .schedule+0x5d0/0x6b0
> [c00000077cb97950] [c0000000003447d8] .schedule_timeout+0x3c/0xe8
> [c00000077cb97a20] [c000000000343d34] .wait_for_common+0x150/0x22c
> [c00000077cb97ae0] [c00000000008ef00] .__stop_machine_run+0xbc/0xf0
> [c00000077cb97bb0] [c00000000008ef70] .stop_machine_run+0x3c/0x80
> [c00000077cb97c50] [c0000000000891f0] .sys_init_module+0x14e4/0x1af4
> [c00000077cb97e30] [c00000000000872c] syscall_exit+0x0/0x40
> -- 0:conmux-control -- time-stamp -- Feb/15/08 16:04:12 --
> INFO: task insmod:387 blocked for more than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> insmod D 000000001000e144 12144 387 1
> Call Trace:
> [c00000077cb97600] [c0000000008fae80] 0xc0000000008fae80 (unreliable)
> [c00000077cb977d0] [c000000000010c7c] .__switch_to+0x11c/0x154
> [c00000077cb97860] [c000000000344498] .schedule+0x5d0/0x6b0
> [c00000077cb97950] [c0000000003447d8] .schedule_timeout+0x3c/0xe8
> [c00000077cb97a20] [c000000000343d34] .wait_for_common+0x150/0x22c
> [c00000077cb97ae0] [c00000000008ef00] .__stop_machine_run+0xbc/0xf0
> [c00000077cb97bb0] [c00000000008ef70] .stop_machine_run+0x3c/0x80
> [c00000077cb97c50] [c0000000000891f0] .sys_init_module+0x14e4/0x1af4
> [c00000077cb97e30] [c00000000000872c] syscall_exit+0x0/0x40
> -- 0:conmux-control -- time-stamp -- Feb/15/08 16:06:21 --
--
"Premature optimization is the root of all evil." - Donald Knuth
On Saturday, 16 of February 2008, Torsten Kaiser wrote:
> On Feb 15, 2008 10:23 PM, Linus Torvalds <[email protected]> wrote:
> >
> > Ok,
> > this kernel is a winner.
>
> Sadly not for me:
> [ 5282.056415] ------------[ cut here ]------------
> [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> [ 5282.062055] invalid opcode: 0000 [1] SMP
> [ 5282.062055] CPU 3
> [ 5282.062055] Modules linked in: radeon drm w83792d ipv6 tuner
> tea5767 tda8290 tuner_xc2028 tda9887 tuner_simple mt20xx tea5761
> tvaudio msp3400 bttv videodev v4l1_compat ir_common compat_ioctl32
> v4l2_common videobuf_dma_sg videobuf_core btcx_risc tveeprom usbhid
> pata_amd i2c_nforce2 hid sg
> [ 5282.062055] Pid: 12937, comm: sed Not tainted 2.6.25-rc2 #1
> [ 5282.062055] RIP: 0010:[<ffffffff803bffe4>]
> -> then the output from the serial console stopped. I was in X, so I
> could not see, if there was anything more on the real console.
>
> (gdb) list *0xffffffff803bffe4
> 0xffffffff803bffe4 is in __list_add (lib/list_debug.c:33).
> 28 }
> 29 if (unlikely(prev->next != next)) {
> 30 printk(KERN_ERR "list_add corruption.
> prev->next should be "
> 31 "next (%p), but was %p. (prev=%p).\n",
> 32 next, prev->next, prev);
> 33 BUG();
> 34 }
> 35 next->prev = new;
> 36 new->next = next;
> 37 new->prev = prev;
>
> For more on this problem see http://marc.info/?l=linux-kernel&m=120293042005445
There's the Bugzilla entry for it at
http://bugzilla.kernel.org/show_bug.cgi?id=9973
Please update it with the current information.
Thanks,
Rafael
On Feb 17, 2008 9:25 PM, Rafael J. Wysocki <[email protected]> wrote:
> There's the Bugzilla entry for it at
> http://bugzilla.kernel.org/show_bug.cgi?id=9973
Thank you.
> Please update it with the current information.
Crash for 2.6.25-rc2-mm1 added. That one had a complete stacktrace,
but the trace looks like others I already reported, so no real new
information... :-(
Torsten
Am 16.02.2008 23:37 schrieb Jiri Slaby:
> On 02/16/2008 09:12 PM, Alan Cox wrote:
>> On Sat, 16 Feb 2008 20:14:30 +0100
>> Tilman Schmidt <[email protected]> wrote:
>>
>>> 2.6.25-rc2 fails to bring up my openSUSE 10.3 PC because LVM
>>> cannot find the volume group containing the root file system.
>>> 2.6.25-rc1 has the same problem, 2.6.24 works fine.
Bisection says:
edfaa7c36574f1bf09c65ad602412db9da5f96bf is first bad commit
commit edfaa7c36574f1bf09c65ad602412db9da5f96bf
Author: Kay Sievers <[email protected]>
Date: Mon May 21 22:08:01 2007 +0200
Driver core: convert block from raw kobjects to core devices
This moves the block devices to /sys/class/block. It will create a
flat list of all block devices, with the disks and partitions in one
directory. For compatibility /sys/block is created and contains symlinks
to the disks.
Apparently, compatibility is in the eye of the beholder - in this
case, LVM.
>> Compile in SCSI disk support. Modular even if loaded in initrd it seems
>> to have broken somewhere.
Setting
CONFIG_SCSI=y
CONFIG_BLK_DEV_SD=y
does not help. The problem persists.
> # CONFIG_SYSFS_DEPRECATED is not set
>
> I would suspect this.
Setting
CONFIG_SYSFS_DEPRECATED=y
does indeed fix the problem and allows me to boot successfully.
Pity, I was so happy getting rid of that a couple of releases ago.
> Try to upgrade to at least lvm 2.02.29 (I guess this is the first version which
> understands the new sysfs layout).
I'll have to investigate how to do that without breaking anything.
HTH
T.
--
Tilman Schmidt E-Mail: [email protected]
Bonn, Germany
Diese Nachricht besteht zu 100% aus wiederverwerteten Bits.
Unge?ffnet mindestens haltbar bis: (siehe R?ckseite)
On Feb 18, 2008 8:57 AM, Tilman Schmidt <[email protected]> wrote:
> Am 16.02.2008 23:37 schrieb Jiri Slaby:
> > On 02/16/2008 09:12 PM, Alan Cox wrote:
> > Try to upgrade to at least lvm 2.02.29 (I guess this is the first version which
> > understands the new sysfs layout).
> I'll have to investigate how to do that without breaking anything.
I faced the same problem, but resolved with ...
vgscan
vgchange -a y
Also, ensure you set "write_cache_state = 1" in /etc/lvm.conf before
running the above.
Let me know if this helps.
Thanks,
Jeff.
Am 17.02.2008 schrieb Jeff Chua:
> I faced the same problem, but resolved with ...
>
> vgscan
> vgchange -a y
Sorry, I'm not sure what to do with those two commands.
Running them once manually doesn't seem to change anything,
and my initrd already contains them AFAICS.
> Also, ensure you set "write_cache_state = 1" in /etc/lvm.conf before
> running the above.
That was already set by default.
Thanks,
Tilman
--
Tilman Schmidt E-Mail: [email protected]
Bonn, Germany
Diese Nachricht besteht zu 100% aus wiederverwerteten Bits.
Unge?ffnet mindestens haltbar bis: (siehe R?ckseite)
On Sat, 16 Feb 2008 11:14:46 +0530 Kamalesh Babulal <[email protected]> wrote:
> The 2.6.25-rc2 kernel oopses while running dbench on ext3 filesystem
> mounted with mount -o data=writeback,nobh option on the x86_64 box
>
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
> IP: [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
> PGD 1f6860067 PUD 1f5d64067 PMD 0
> Oops: 0000 [1] SMP
> CPU 3
> Modules linked in:
> Pid: 4271, comm: dbench Not tainted 2.6.25-rc2-autotest #1
> RIP: 0010:[<ffffffff80274972>] [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
> RSP: 0000:ffff8101fb041dc8 EFLAGS: 00010246
> RAX: 0000000000000000 RBX: ffff810180033c00 RCX: ffffffff8027b269
> RDX: 0000000000000000 RSI: 00000000000080d0 RDI: ffffffff80632d70
> RBP: 00000000000080d0 R08: 0000000000000001 R09: 0000000000000000
> R10: ffff8101feb36e50 R11: 0000000000000190 R12: 0000000000000001
> R13: 0000000000000000 R14: ffff8101f8f38000 R15: 00000000ffffff9c
> FS: 0000000000000000(0000) GS:ffff8101fff0f000(0063) knlGS:00000000f7e41460
> CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
> CR2: 0000000000000000 CR3: 00000001f5620000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process dbench (pid: 4271, threadinfo ffff8101fb040000, task ffff8101fb180000)
> Stack: 0000000000000001 ffff8101fb041ea8 0000000000000001 ffffffff8027b269
> ffff8101fb041ea8 ffffffff80281fe8 0000000000000001 0000000000000000
> ffff8101fb041ea8 00000000ffffff9c 000000000000000b 0000000000000001
> Call Trace:
> [<ffffffff8027b269>] get_empty_filp+0x55/0xf9
> [<ffffffff80281fe8>] __path_lookup_intent_open+0x22/0x8f
> [<ffffffff80282853>] open_namei+0x86/0x5a7
> [<ffffffff8027d019>] vfs_stat_fd+0x3c/0x4a
> [<ffffffff80279ab1>] do_filp_open+0x1c/0x3d
> [<ffffffff80279c2c>] get_unused_fd_flags+0x79/0x111
> [<ffffffff80279dce>] do_sys_open+0x46/0xca
> [<ffffffff80221c82>] ia32_sysret+0x0/0xa
>
Looks to me like we broke slab. Christoph is offline until the 27th..
00:00.0 Host bridge: Intel Corporation 82975X Memory Controller Hub
00:01.0 PCI bridge: Intel Corporation 82975X PCI Express Root Port
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 01)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 01)
00:1c.4 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 5 (rev 01)
00:1c.5 PCI bridge: Intel Corporation 82801GR/GH/GHM (ICH7 Family) PCI Express Port 6 (rev 01)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 01)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 01)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 01)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 01)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 01)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
00:1f.0 ISA bridge: Intel Corporation 82801GH (ICH7DH) LPC Interface Bridge (rev 01)
00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01)
00:1f.2 SATA controller: Intel Corporation 82801GR/GH (ICH7 Family) SATA AHCI Controller (rev 01)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 01)
01:00.0 VGA compatible controller: ATI Technologies Inc R580 [Radeon X1900 XT] (Primary)
01:00.1 Display controller: ATI Technologies Inc R580 [Radeon X1900 XT] (Secondary)
02:00.0 Multimedia controller: Philips Semiconductors Unknown device 7162
04:00.0 Ethernet controller: Intel Corporation 82573L Gigabit Ethernet Controller
05:02.0 Network controller: RaLink RT2561/RT61 802.11g PCI
05:04.0 FireWire (IEEE 1394): Texas Instruments TSB43AB23 IEEE-1394a-2000 Controller (PHY/Link)
05:05.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02)
Jeff Garzik wrote:
> Two x86-64 boxes here lock up here on 2.6.25-rc2, shortly after boot.
> One running Fedora 8 + X (GNOME) and one a headless file server.
> configs and lspci attached. Unable to capture any splatter so far.
Sounds like it may be http://lkml.org/lkml/2008/2/17/78.
Suggest you try reverting that before doing the bisect.
Cheers,
FJP
On Sat, 16 Feb 2008, Torsten Kaiser wrote:
>
> [ 5282.056415] ------------[ cut here ]------------
> [ 5282.059757] kernel BUG at lib/list_debug.c:33!
Is there any chance that you could try to bisect this, if it's repeatable
enough for you? Even if you can't bisect it *all* the way, it would be
really good to do a handful of bisection runs which should already
hopefully narrow it down a bit more.
Linus
On Sat, Feb 16, 2008 at 11:37:37PM +0100, Jiri Slaby wrote:
> # CONFIG_SYSFS_DEPRECATED is not set
IMHO That should be *set* by default until everyone has had time to
update their userspace software to cope with the changed sysfs layout.
Alasdair
--
[email protected]
* Torsten Kaiser <[email protected]> wrote:
> On Feb 15, 2008 10:23 PM, Linus Torvalds <[email protected]> wrote:
> >
> > Ok,
> > this kernel is a winner.
>
> Sadly not for me:
> [ 5282.056415] ------------[ cut here ]------------
> [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> [ 5282.062055] invalid opcode: 0000 [1] SMP
> [ 5282.062055] CPU 3
hm. Your crashes do seem to span multiple subsystems, but it always
seems to be around the SLUB code. Could you try the patch below? The
SLUB code has a new optimization and i'm not 100% sure about it. [the
hack below switches the SLUB optimization off by disabling the CPU
feature it relies on.]
Ingo
------------->
arch/x86/Kconfig | 4 ----
1 file changed, 4 deletions(-)
Index: linux/arch/x86/Kconfig
===================================================================
--- linux.orig/arch/x86/Kconfig
+++ linux/arch/x86/Kconfig
@@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
config SEMAPHORE_SLEEPERS
def_bool y
-config FAST_CMPXCHG_LOCAL
- bool
- default y
-
config MMU
def_bool y
On Feb 19, 2008 12:54 AM, Linus Torvalds <[email protected]> wrote:
>
>
> On Sat, 16 Feb 2008, Torsten Kaiser wrote:
> >
> > [ 5282.056415] ------------[ cut here ]------------
> > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
>
> Is there any chance that you could try to bisect this, if it's repeatable
> enough for you? Even if you can't bisect it *all* the way, it would be
> really good to do a handful of bisection runs which should already
> hopefully narrow it down a bit more.
>
> Linus
>
It's repeatable, but not in a really reliable way.
So to mark a kernel good I need to compile around 100 KDE packages,
and even then I'm not 100% sure, if it's good or if I was just lucky.
But I did a partly bisect against 2.6.24-rc6-mm1:
2.6.24-rc6 + mm-patches up to (including) git.nfsd -> worked
2.6.24-rc6 + mm-patches up to (including) git.xfs -> crashed
I think the only added patch between rc2-mm1 and rc3-mm2 in that range
where the iommu changes that I later ruled out.
That leaves some git trees as suspects:
git-ocfs2.patch
git-selinux.patch
git-s390.patch
git-sched.patch
git-sh.patch
git-scsi-misc.patch
git-unionfs.patch
git-v9fs.patch
git-watchdog.patch
git-wireless.patch
git-ipwireless_cs.patch
git-x86.patch
git-xfs.patch
(see http://marc.info/?l=linux-kernel&m=120276641105256 )
Torsten
On Feb 19, 2008 7:11 AM, Ingo Molnar <[email protected]> wrote:
> * Torsten Kaiser <[email protected]> wrote:
> > On Feb 15, 2008 10:23 PM, Linus Torvalds <[email protected]> wrote:
> > >
> > > Ok,
> > > this kernel is a winner.
> >
> > Sadly not for me:
> > [ 5282.056415] ------------[ cut here ]------------
> > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> > [ 5282.062055] invalid opcode: 0000 [1] SMP
> > [ 5282.062055] CPU 3
>
> hm. Your crashes do seem to span multiple subsystems, but it always
> seems to be around the SLUB code. Could you try the patch below? The
> SLUB code has a new optimization and i'm not 100% sure about it. [the
> hack below switches the SLUB optimization off by disabling the CPU
> feature it relies on.]
>
> Ingo
>
> ------------->
> arch/x86/Kconfig | 4 ----
> 1 file changed, 4 deletions(-)
>
> Index: linux/arch/x86/Kconfig
> ===================================================================
> --- linux.orig/arch/x86/Kconfig
> +++ linux/arch/x86/Kconfig
> @@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
> config SEMAPHORE_SLEEPERS
> def_bool y
>
> -config FAST_CMPXCHG_LOCAL
> - bool
> - default y
> -
> config MMU
> def_bool y
>
$ grep FAST_CMPXCHG_LOCAL */.config
linux-2.6.24-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.24-rc3-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.24-rc3-mm2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.24-rc6-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.24-rc8-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.25-rc1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.25-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
linux-2.6.25-rc2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
-rc2-mm1 still worked for me.
Did you mean the new SLUB_FASTPATH?
$ grep "define SLUB_FASTPATH" */mm/slub.c
linux-2.6.25-rc1/mm/slub.c:#define SLUB_FASTPATH
linux-2.6.25-rc2-mm1/mm/slub.c:#define SLUB_FASTPATH
linux-2.6.25-rc2/mm/slub.c:#define SLUB_FASTPATH
The 2.6.24-rc3+ mm-kernels did crash for me, but don't seem to contain this...
On the other hand:
>From the crash in 2.6.25-rc2-mm1:
[59987.116182] RIP [<ffffffff8029f83d>] kmem_cache_alloc_node+0x6d/0xa0
(gdb) list *0xffffffff8029f83d
0xffffffff8029f83d is in kmem_cache_alloc_node (mm/slub.c:1646).
1641 if (unlikely(is_end(object) || !node_match(c, node))) {
1642 object = __slab_alloc(s, gfpflags,
node, addr, c);
1643 break;
1644 }
1645 stat(c, ALLOC_FASTPATH);
1646 } while (cmpxchg_local(&c->freelist, object, object[c->offset])
1647
!= object);
1648 #else
1649 unsigned long flags;
1650
That code is part for SLUB_FASTPATH.
I'm willing to test the patch, but don't know how fast I can find the
time to do it, so my answer if your patch helps might be delayed until
the weekend.
Torsten
On Feb 19, 2008 8:54 AM, Torsten Kaiser <[email protected]> wrote:
> > > [ 5282.056415] ------------[ cut here ]------------
> > > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> > > [ 5282.062055] invalid opcode: 0000 [1] SMP
> > > [ 5282.062055] CPU 3
> >
> > hm. Your crashes do seem to span multiple subsystems, but it always
> > seems to be around the SLUB code. Could you try the patch below? The
> > SLUB code has a new optimization and i'm not 100% sure about it. [the
> > hack below switches the SLUB optimization off by disabling the CPU
> > feature it relies on.]
> >
> > Ingo
> >
> > ------------->
> > arch/x86/Kconfig | 4 ----
> > 1 file changed, 4 deletions(-)
> >
> > Index: linux/arch/x86/Kconfig
> > ===================================================================
> > --- linux.orig/arch/x86/Kconfig
> > +++ linux/arch/x86/Kconfig
> > @@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
> > config SEMAPHORE_SLEEPERS
> > def_bool y
> >
> > -config FAST_CMPXCHG_LOCAL
> > - bool
> > - default y
> > -
> > config MMU
> > def_bool y
> >
>
> $ grep FAST_CMPXCHG_LOCAL */.config
> linux-2.6.24-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.24-rc3-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.24-rc3-mm2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.24-rc6-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.24-rc8-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.25-rc1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.25-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> linux-2.6.25-rc2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
>
> -rc2-mm1 still worked for me.
>
> Did you mean the new SLUB_FASTPATH?
> $ grep "define SLUB_FASTPATH" */mm/slub.c
> linux-2.6.25-rc1/mm/slub.c:#define SLUB_FASTPATH
> linux-2.6.25-rc2-mm1/mm/slub.c:#define SLUB_FASTPATH
> linux-2.6.25-rc2/mm/slub.c:#define SLUB_FASTPATH
>
> The 2.6.24-rc3+ mm-kernels did crash for me, but don't seem to contain this...
>
> On the other hand:
> From the crash in 2.6.25-rc2-mm1:
> [59987.116182] RIP [<ffffffff8029f83d>] kmem_cache_alloc_node+0x6d/0xa0
>
> (gdb) list *0xffffffff8029f83d
> 0xffffffff8029f83d is in kmem_cache_alloc_node (mm/slub.c:1646).
> 1641 if (unlikely(is_end(object) || !node_match(c, node))) {
> 1642 object = __slab_alloc(s, gfpflags,
> node, addr, c);
> 1643 break;
> 1644 }
> 1645 stat(c, ALLOC_FASTPATH);
> 1646 } while (cmpxchg_local(&c->freelist, object, object[c->offset])
> 1647
> != object);
> 1648 #else
> 1649 unsigned long flags;
> 1650
>
> That code is part for SLUB_FASTPATH.
>
> I'm willing to test the patch, but don't know how fast I can find the
> time to do it, so my answer if your patch helps might be delayed until
> the weekend.
Mathieu, Christoph is on vacation and I'm not at all that familiar
with this cmpxchg_local() optimization, so if you could take a peek at
this bug report to see if you can spot something obviously wrong with
it, I would much appreciate that.
On Sun, 17 Feb 2008 20:29:13 +0100
Jens Axboe <[email protected]> wrote:
> It's odd stuff. Could you perhaps try and add some printks to
> block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> for() loop after the lookup?
>
I met the same issue on ia64/NUMA box.
seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was always '1'.
Attached patch works well for me,
but I don't know much about cfq. please confirm.
Regards,
-Kame
==
cics[]->key can be NULL.
In that case, cics[]->dead_key has key value.
Signed-off-by: KAMEZAWA Hiroyuki <[email protected]>
Index: linux-2.6.25-rc2/block/cfq-iosched.c
===================================================================
--- linux-2.6.25-rc2.orig/block/cfq-iosched.c
+++ linux-2.6.25-rc2/block/cfq-iosched.c
@@ -1171,7 +1171,11 @@ call_for_each_cic(struct io_context *ioc
break;
called += nr;
- index = 1 + (unsigned long) cics[nr - 1]->key;
+
+ if (!cics[nr - 1]->key)
+ index = 1 + (unsigned long) cics[nr - 1]->dead_key;
+ else
+ index = 1 + (unsigned long) cics[nr - 1]->key;
for (i = 0; i < nr; i++)
func(ioc, cics[i]);
On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> On Sun, 17 Feb 2008 20:29:13 +0100
> Jens Axboe <[email protected]> wrote:
>
> > It's odd stuff. Could you perhaps try and add some printks to
> > block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> > from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> > for() loop after the lookup?
> >
> I met the same issue on ia64/NUMA box.
> seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
> always '1'.
Why does it keep repeating then? If ->key is NULL, the next lookup index
should be 1UL.
But I think the radix 'scan over entire tree' is a bit fragile. This
patch adds a parallel hlist for ease of properly browsing the members,
does that work for you? It compiles, but I haven't booted it here yet...
> Attached patch works well for me, but I don't know much about cfq.
> please confirm.
It doesn't make a lot of sense, I'm afraid.
block/blk-ioc.c | 35 +++++++++++++++--------------------
block/cfq-iosched.c | 37 +++++++++++--------------------------
include/linux/iocontext.h | 2 ++
3 files changed, 28 insertions(+), 46 deletions(-)
diff --git a/block/blk-ioc.c b/block/blk-ioc.c
index 80245dc..73c7002 100644
--- a/block/blk-ioc.c
+++ b/block/blk-ioc.c
@@ -17,17 +17,13 @@ static struct kmem_cache *iocontext_cachep;
static void cfq_dtor(struct io_context *ioc)
{
- struct cfq_io_context *cic[1];
- int r;
+ if (!hlist_empty(&ioc->cic_list)) {
+ struct cfq_io_context *cic;
- /*
- * We don't have a specific key to lookup with, so use the gang
- * lookup to just retrieve the first item stored. The cfq exit
- * function will iterate the full tree, so any member will do.
- */
- r = radix_tree_gang_lookup(&ioc->radix_root, (void **) cic, 0, 1);
- if (r > 0)
- cic[0]->dtor(ioc);
+ cic = list_entry(ioc->cic_list.first, struct cfq_io_context,
+ cic_list);
+ cic->dtor(ioc);
+ }
}
/*
@@ -57,18 +53,16 @@ EXPORT_SYMBOL(put_io_context);
static void cfq_exit(struct io_context *ioc)
{
- struct cfq_io_context *cic[1];
- int r;
-
rcu_read_lock();
- /*
- * See comment for cfq_dtor()
- */
- r = radix_tree_gang_lookup(&ioc->radix_root, (void **) cic, 0, 1);
- rcu_read_unlock();
- if (r > 0)
- cic[0]->exit(ioc);
+ if (!hlist_empty(&ioc->cic_list)) {
+ struct cfq_io_context *cic;
+
+ cic = list_entry(ioc->cic_list.first, struct cfq_io_context,
+ cic_list);
+ cic->exit(ioc);
+ }
+ rcu_read_unlock();
}
/* Called by the exitting task */
@@ -105,6 +99,7 @@ struct io_context *alloc_io_context(gfp_t gfp_flags, int node)
ret->nr_batch_requests = 0; /* because this is 0 */
ret->aic = NULL;
INIT_RADIX_TREE(&ret->radix_root, GFP_ATOMIC | __GFP_HIGH);
+ INIT_HLIST_HEAD(&ret->cic_list);
ret->ioc_data = NULL;
}
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index ca198e6..62eda3f 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1145,38 +1145,19 @@ static void cfq_put_queue(struct cfq_queue *cfqq)
/*
* Call func for each cic attached to this ioc. Returns number of cic's seen.
*/
-#define CIC_GANG_NR 16
static unsigned int
call_for_each_cic(struct io_context *ioc,
void (*func)(struct io_context *, struct cfq_io_context *))
{
- struct cfq_io_context *cics[CIC_GANG_NR];
- unsigned long index = 0;
- unsigned int called = 0;
- int nr;
+ struct cfq_io_context *cic;
+ struct hlist_node *n;
+ int called = 0;
rcu_read_lock();
-
- do {
- int i;
-
- /*
- * Perhaps there's a better way - this just gang lookups from
- * 0 to the end, restarting after each CIC_GANG_NR from the
- * last key + 1.
- */
- nr = radix_tree_gang_lookup(&ioc->radix_root, (void **) cics,
- index, CIC_GANG_NR);
- if (!nr)
- break;
-
- called += nr;
- index = 1 + (unsigned long) cics[nr - 1]->key;
-
- for (i = 0; i < nr; i++)
- func(ioc, cics[i]);
- } while (nr == CIC_GANG_NR);
-
+ hlist_for_each_entry_rcu(cic, n, &ioc->cic_list, cic_list) {
+ func(ioc, cic);
+ called++;
+ }
rcu_read_unlock();
return called;
@@ -1190,6 +1171,7 @@ static void cic_free_func(struct io_context *ioc, struct cfq_io_context *cic)
spin_lock_irqsave(&ioc->lock, flags);
radix_tree_delete(&ioc->radix_root, cic->dead_key);
+ hlist_del_rcu(&cic->cic_list);
spin_unlock_irqrestore(&ioc->lock, flags);
kmem_cache_free(cfq_ioc_pool, cic);
@@ -1280,6 +1262,7 @@ cfq_alloc_io_context(struct cfq_data *cfqd, gfp_t gfp_mask)
if (cic) {
cic->last_end_request = jiffies;
INIT_LIST_HEAD(&cic->queue_list);
+ INIT_HLIST_NODE(&cic->cic_list);
cic->dtor = cfq_free_io_context;
cic->exit = cfq_exit_io_context;
elv_ioc_count_inc(ioc_count);
@@ -1501,6 +1484,7 @@ cfq_drop_dead_cic(struct cfq_data *cfqd, struct io_context *ioc,
rcu_assign_pointer(ioc->ioc_data, NULL);
radix_tree_delete(&ioc->radix_root, (unsigned long) cfqd);
+ hlist_del_rcu(&cic->cic_list);
spin_unlock_irqrestore(&ioc->lock, flags);
cfq_cic_free(cic);
@@ -1561,6 +1545,7 @@ static int cfq_cic_link(struct cfq_data *cfqd, struct io_context *ioc,
spin_lock_irqsave(&ioc->lock, flags);
ret = radix_tree_insert(&ioc->radix_root,
(unsigned long) cfqd, cic);
+ hlist_add_head_rcu(&cic->cic_list, &ioc->cic_list);
spin_unlock_irqrestore(&ioc->lock, flags);
radix_tree_preload_end();
diff --git a/include/linux/iocontext.h b/include/linux/iocontext.h
index 593b222..1b4ccf2 100644
--- a/include/linux/iocontext.h
+++ b/include/linux/iocontext.h
@@ -50,6 +50,7 @@ struct cfq_io_context {
sector_t seek_mean;
struct list_head queue_list;
+ struct hlist_node cic_list;
void (*dtor)(struct io_context *); /* destructor */
void (*exit)(struct io_context *); /* called on task exit */
@@ -77,6 +78,7 @@ struct io_context {
struct as_io_context *aic;
struct radix_tree_root radix_root;
+ struct hlist_head cic_list;
void *ioc_data;
};
--
Jens Axboe
On Tue, 19 Feb 2008 09:36:34 +0100
Jens Axboe <[email protected]> wrote:
> On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> > On Sun, 17 Feb 2008 20:29:13 +0100
> > Jens Axboe <[email protected]> wrote:
> >
> > > It's odd stuff. Could you perhaps try and add some printks to
> > > block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> > > from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> > > for() loop after the lookup?
> > >
> > I met the same issue on ia64/NUMA box.
> > seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
> > always '1'.
>
> Why does it keep repeating then? If ->key is NULL, the next lookup index
> should be 1UL.
>
when I inserted printk here
==
for (i = 0; i < nr; i++)
func(ioc, cics[i]);
printk("%d %lx\n", nr, index);
==
index was always "1" and nr was always 32.
So, cics[31]->key was always NULL when index=1 is passed to radix_tree_gang_lookup().
> But I think the radix 'scan over entire tree' is a bit fragile. This
> patch adds a parallel hlist for ease of properly browsing the members,
> does that work for you? It compiles, but I haven't booted it here yet...
>
will try. please wait a bit.
Thanks,
-Kame
[added CCs from the other thread on this topic]
Alasdair G Kergon schrieb:
> On Sat, Feb 16, 2008 at 11:37:37PM +0100, Jiri Slaby wrote:
>> # CONFIG_SYSFS_DEPRECATED is not set
>
> IMHO That should be *set* by default until everyone has had time to
> update their userspace software to cope with the changed sysfs layout.
It *is* set by default.
The root cause of the trouble is that its semantics are changing.
At one point in time (sorry, don't remember which kernel release
exactly) I tested whether the openSUSE 10.3 userspace supported
a CONFIG_SYSFS_DEPRECATED=n kernel and found that it did. From
then on, "make oldconfig" would carry that setting over to every
new kernel I built, which was fine while the meaning of this
setting - ie. the difference in sysfs layout it controlled -
stayed the same.
With commit edfaa7c36574f1bf09c65ad602412db9da5f96bf however, the
sysfs layout changed again, so the same CONFIG_SYSFS_DEPRECATED
setting now controls a different difference (argh) in sysfs
layout. That kind of situation is not handled very well by
"make oldconfig", which basically starts from the assumption
that a setting that was ok for the previous kernel version is
still ok for the new one.
I see two ways of avoiding that problem: either create a new
backward compatibility config setting for that new sysfs change,
or create a way of telling "make oldconfig" that the semantics of
CONFIG_SYSFS_DEPRECATED have changed and it should ask the user
for that again even if there is a previous setting.
HTH
T.
--
Tilman Schmidt E-Mail: [email protected]
Bonn, Germany
Diese Nachricht besteht zu 100% aus wiederverwerteten Bits.
Unge?ffnet mindestens haltbar bis: (siehe R?ckseite)
On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> On Tue, 19 Feb 2008 09:36:34 +0100
> Jens Axboe <[email protected]> wrote:
>
> > On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> > > On Sun, 17 Feb 2008 20:29:13 +0100
> > > Jens Axboe <[email protected]> wrote:
> > >
> > > > It's odd stuff. Could you perhaps try and add some printks to
> > > > block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> > > > from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> > > > for() loop after the lookup?
> > > >
> > > I met the same issue on ia64/NUMA box.
> > > seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
> > > always '1'.
> >
> > Why does it keep repeating then? If ->key is NULL, the next lookup index
> > should be 1UL.
> >
> when I inserted printk here
> ==
> for (i = 0; i < nr; i++)
> func(ioc, cics[i]);
> printk("%d %lx\n", nr, index);
> ==
> index was always "1" and nr was always 32.
>
> So, cics[31]->key was always NULL when index=1 is passed to
> radix_tree_gang_lookup().
Hang on, it returned 32? It should not return more than 16, since that
is what we have room for and asked for. Using ->dead_key when ->key is
NULL is correct btw, since that is the correct location in the tree once
the process has exited. But that should not happen until AFTER the
func() call, so I still think the list patch is safer.
> > But I think the radix 'scan over entire tree' is a bit fragile. This
> > patch adds a parallel hlist for ease of properly browsing the
> > members, does that work for you? It compiles, but I haven't booted
> > it here yet...
> >
> will try. please wait a bit.
It boots here, so at least it passes normal sanity tests. It should
solve your problem as well, hopefully.
--
Jens Axboe
On Tue, 19 Feb 2008 09:36:34 +0100
Jens Axboe <[email protected]> wrote:
> On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> > On Sun, 17 Feb 2008 20:29:13 +0100
> > Jens Axboe <[email protected]> wrote:
> >
> > > It's odd stuff. Could you perhaps try and add some printks to
> > > block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> > > from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> > > for() loop after the lookup?
> > >
> > I met the same issue on ia64/NUMA box.
> > seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
> > always '1'.
>
> Why does it keep repeating then? If ->key is NULL, the next lookup index
> should be 1UL.
>
> But I think the radix 'scan over entire tree' is a bit fragile. This
> patch adds a parallel hlist for ease of properly browsing the members,
> does that work for you? It compiles, but I haven't booted it here yet...
>
Works well for me and my box booted !
Thanks,
-Kame
On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> On Tue, 19 Feb 2008 09:36:34 +0100
> Jens Axboe <[email protected]> wrote:
>
> > On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> > > On Sun, 17 Feb 2008 20:29:13 +0100
> > > Jens Axboe <[email protected]> wrote:
> > >
> > > > It's odd stuff. Could you perhaps try and add some printks to
> > > > block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
> > > > from radix_tree_gang_lookup() and the pointer value of cics[i] in the
> > > > for() loop after the lookup?
> > > >
> > > I met the same issue on ia64/NUMA box.
> > > seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
> > > always '1'.
> >
> > Why does it keep repeating then? If ->key is NULL, the next lookup index
> > should be 1UL.
> >
> > But I think the radix 'scan over entire tree' is a bit fragile. This
> > patch adds a parallel hlist for ease of properly browsing the members,
> > does that work for you? It compiles, but I haven't booted it here yet...
> >
> Works well for me and my box booted !
Super, I'll get it upstream. Thanks for testing and debugging!
--
Jens Axboe
On Tue, 19 Feb 2008 09:58:38 +0100
Jens Axboe <[email protected]> wrote:
> > when I inserted printk here
> > ==
> > for (i = 0; i < nr; i++)
> > func(ioc, cics[i]);
> > printk("%d %lx\n", nr, index);
> > ==
> > index was always "1" and nr was always 32.
> >
> > So, cics[31]->key was always NULL when index=1 is passed to
> > radix_tree_gang_lookup().
>
> Hang on, it returned 32? It should not return more than 16, since that
> is what we have room for and asked for.
sorry. Of course, it was 16 ;(
your patch works well. thank you.
-Kame
On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
> On Tue, 19 Feb 2008 09:58:38 +0100
> Jens Axboe <[email protected]> wrote:
> > > when I inserted printk here
> > > ==
> > > for (i = 0; i < nr; i++)
> > > func(ioc, cics[i]);
> > > printk("%d %lx\n", nr, index);
> > > ==
> > > index was always "1" and nr was always 32.
> > >
> > > So, cics[31]->key was always NULL when index=1 is passed to
> > > radix_tree_gang_lookup().
> >
> > Hang on, it returned 32? It should not return more than 16, since that
> > is what we have room for and asked for.
> sorry. Of course, it was 16 ;(
I expected so, otherwise we would have had far more serious problems :-)
> your patch works well. thank you.
It's committed now and posted in the relevant bugzilla as well (#9948).
--
Jens Axboe
* Pekka Enberg <[email protected]> wrote:
> Mathieu, Christoph is on vacation and I'm not at all that familiar
> with this cmpxchg_local() optimization, so if you could take a peek at
> this bug report to see if you can spot something obviously wrong with
> it, I would much appreciate that.
hm, it's bad for at least one other reason as well (which is probably
unrelated to this crash):
/*
* Currently fastpath is not supported if preemption is enabled.
*/
#if defined(CONFIG_FAST_CMPXCHG_LOCAL) && !defined(CONFIG_PREEMPT)
#define SLUB_FASTPATH
#endif
such !PREEMPT exceptions tend to show "i didnt want to think too hard
about the preemptible case so just turn it off" thinking.
Also, why isnt this "SLUB_FASTPATH" flag done in the Kconfig space?
Ingo
Hi,
Pekka Enberg <[email protected]> wrote:
> > Mathieu, Christoph is on vacation and I'm not at all that familiar
> > with this cmpxchg_local() optimization, so if you could take a peek at
> > this bug report to see if you can spot something obviously wrong with
> > it, I would much appreciate that.
On Feb 19, 2008 12:27 PM, Ingo Molnar <[email protected]> wrote:
> hm, it's bad for at least one other reason as well (which is probably
> unrelated to this crash):
>
> /*
> * Currently fastpath is not supported if preemption is enabled.
> */
> #if defined(CONFIG_FAST_CMPXCHG_LOCAL) && !defined(CONFIG_PREEMPT)
> #define SLUB_FASTPATH
> #endif
>
> such !PREEMPT exceptions tend to show "i didnt want to think too hard
> about the preemptible case so just turn it off" thinking.
>
> Also, why isnt this "SLUB_FASTPATH" flag done in the Kconfig space?
Hmm, no idea. I think might have been some mix-up with merging the
patch. The one I saw was:
http://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24/2.6.24-mm1/broken-out/slub-optional-fast-path-using-cmpxchg_local.patch
But I don't remember giving out a Reviewed-by for it (and my mailbox
confirms that). Furthermore, somehow it turned into this when merged:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c
In any case, if Torsten/someone can verify that reverting
1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c ("SLUB: Alternate fast paths
using cmpxchg_local") fixes these problems, I think we should just do
it and let Christoph sort it out when he gets back.
Pekka
* Ingo Molnar ([email protected]) wrote:
>
> * Pekka Enberg <[email protected]> wrote:
>
> > Mathieu, Christoph is on vacation and I'm not at all that familiar
> > with this cmpxchg_local() optimization, so if you could take a peek at
> > this bug report to see if you can spot something obviously wrong with
> > it, I would much appreciate that.
>
> hm, it's bad for at least one other reason as well (which is probably
> unrelated to this crash):
>
> /*
> * Currently fastpath is not supported if preemption is enabled.
> */
> #if defined(CONFIG_FAST_CMPXCHG_LOCAL) && !defined(CONFIG_PREEMPT)
> #define SLUB_FASTPATH
> #endif
>
> such !PREEMPT exceptions tend to show "i didnt want to think too hard
> about the preemptible case so just turn it off" thinking.
>
Ingo, a comment in slub.c explains it :
/*
* The SLUB_FASTPATH path is provisional and is currently disabled if the
* kernel is compiled with preemption or if the arch does not support
* fast cmpxchg operations. There are a couple of coming changes that will
* simplify matters and allow preemption. Ultimately we may end up making
* SLUB_FASTPATH the default.
*
* 1. The introduction of the per cpu allocator will avoid array lookups
* through get_cpu_slab(). A special register can be used instead.
*
* 2. The introduction of per cpu atomic operations (cpu_ops) means that
* we can realize the logic here entirely with per cpu atomics. The
* per cpu atomic ops will take care of the preemption issues.
*/
So there is more coming in the preemption area.
> Also, why isnt this "SLUB_FASTPATH" flag done in the Kconfig space?
>
Eventually, I think only CONFIG_FAST_CMPXCHG_LOCAL will be needed (when
the code will support preemption). Therefore, this SLUB_FASTPATH define
seems to be only here temporarily.
I'm looking at the code right now.. more to come.
Mathieu
> Ingo
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
Jens Axboe wrote:
> On Tue, Feb 19 2008, KAMEZAWA Hiroyuki wrote:
>> On Sun, 17 Feb 2008 20:29:13 +0100
>> Jens Axboe <[email protected]> wrote:
>>
>>> It's odd stuff. Could you perhaps try and add some printks to
>>> block/cfq-iosched.c:call_for_each_cic(), like dumping the 'nr' return
>>> from radix_tree_gang_lookup() and the pointer value of cics[i] in the
>>> for() loop after the lookup?
>>>
>> I met the same issue on ia64/NUMA box.
>> seems cisc[]->key is NULL and index for radix_tree_gang_lookup() was
>> always '1'.
>
> Why does it keep repeating then? If ->key is NULL, the next lookup index
> should be 1UL.
>
> But I think the radix 'scan over entire tree' is a bit fragile. This
> patch adds a parallel hlist for ease of properly browsing the members,
> does that work for you? It compiles, but I haven't booted it here yet...
>
>> Attached patch works well for me, but I don't know much about cfq.
>> please confirm.
>
> It doesn't make a lot of sense, I'm afraid.
>
> block/blk-ioc.c | 35 +++++++++++++++--------------------
> block/cfq-iosched.c | 37 +++++++++++--------------------------
> include/linux/iocontext.h | 2 ++
> 3 files changed, 28 insertions(+), 46 deletions(-)
>
> diff --git a/block/blk-ioc.c b/block/blk-ioc.c
> index 80245dc..73c7002 100644
> --- a/block/blk-ioc.c
<snip>
Hi Jens,
Thanks for the patch. The patch works fine, machine boots up without the kernel panic.
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
* Mathieu Desnoyers <[email protected]> wrote:
> Ingo, a comment in slub.c explains it :
>
> /*
> * The SLUB_FASTPATH path is provisional and is currently disabled if the
> * kernel is compiled with preemption or if the arch does not support
> * fast cmpxchg operations. There are a couple of coming changes that will
> * simplify matters and allow preemption. Ultimately we may end up making
> * SLUB_FASTPATH the default.
well the feature is not complete and there are no reasons given _why_
it's not complete ... and even if there's a reason it should have been
deferred to the next merge window. We still have 10 year old "this is a
temporary hack" comments in the kernel ;-)
"hardware does not support it" is a valid argument, "kernel developer
had no time to implement it properly" is not ;-)
Ingo
* Pekka Enberg ([email protected]) wrote:
> On Feb 19, 2008 8:54 AM, Torsten Kaiser <[email protected]> wrote:
> > > > [ 5282.056415] ------------[ cut here ]------------
> > > > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> > > > [ 5282.062055] invalid opcode: 0000 [1] SMP
> > > > [ 5282.062055] CPU 3
> > >
> > > hm. Your crashes do seem to span multiple subsystems, but it always
> > > seems to be around the SLUB code. Could you try the patch below? The
> > > SLUB code has a new optimization and i'm not 100% sure about it. [the
> > > hack below switches the SLUB optimization off by disabling the CPU
> > > feature it relies on.]
> > >
> > > Ingo
> > >
> > > ------------->
> > > arch/x86/Kconfig | 4 ----
> > > 1 file changed, 4 deletions(-)
> > >
> > > Index: linux/arch/x86/Kconfig
> > > ===================================================================
> > > --- linux.orig/arch/x86/Kconfig
> > > +++ linux/arch/x86/Kconfig
> > > @@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
> > > config SEMAPHORE_SLEEPERS
> > > def_bool y
> > >
> > > -config FAST_CMPXCHG_LOCAL
> > > - bool
> > > - default y
> > > -
> > > config MMU
> > > def_bool y
> > >
> >
> > $ grep FAST_CMPXCHG_LOCAL */.config
> > linux-2.6.24-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.24-rc3-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.24-rc3-mm2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.24-rc6-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.24-rc8-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.25-rc1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.25-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > linux-2.6.25-rc2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> >
> > -rc2-mm1 still worked for me.
> >
> > Did you mean the new SLUB_FASTPATH?
> > $ grep "define SLUB_FASTPATH" */mm/slub.c
> > linux-2.6.25-rc1/mm/slub.c:#define SLUB_FASTPATH
> > linux-2.6.25-rc2-mm1/mm/slub.c:#define SLUB_FASTPATH
> > linux-2.6.25-rc2/mm/slub.c:#define SLUB_FASTPATH
> >
> > The 2.6.24-rc3+ mm-kernels did crash for me, but don't seem to contain this...
> >
> > On the other hand:
> > From the crash in 2.6.25-rc2-mm1:
> > [59987.116182] RIP [<ffffffff8029f83d>] kmem_cache_alloc_node+0x6d/0xa0
> >
> > (gdb) list *0xffffffff8029f83d
> > 0xffffffff8029f83d is in kmem_cache_alloc_node (mm/slub.c:1646).
> > 1641 if (unlikely(is_end(object) || !node_match(c, node))) {
> > 1642 object = __slab_alloc(s, gfpflags,
> > node, addr, c);
> > 1643 break;
> > 1644 }
> > 1645 stat(c, ALLOC_FASTPATH);
> > 1646 } while (cmpxchg_local(&c->freelist, object, object[c->offset])
> > 1647
> > != object);
> > 1648 #else
> > 1649 unsigned long flags;
> > 1650
> >
> > That code is part for SLUB_FASTPATH.
> >
> > I'm willing to test the patch, but don't know how fast I can find the
> > time to do it, so my answer if your patch helps might be delayed until
> > the weekend.
>
> Mathieu, Christoph is on vacation and I'm not at all that familiar
> with this cmpxchg_local() optimization, so if you could take a peek at
> this bug report to see if you can spot something obviously wrong with
> it, I would much appreciate that.
Sure,
Initial thoughts :
I'd like to get the complete config causing this bug. I suspect either :
- A race between the lockless algo and an IRQ in a driver allocating
memory.
- stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
indicating it is not reentrant if IRQs are disabled. Since those are
only stats, I guess it's ok, but still weird.
- CPU hotplug problem.
http://bugzilla.kernel.org/attachment.cgi?id=14877&action=view shows
last sysfs file:
/sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
-- is this linked to a cpu up/down event ?
Since this shows mostly with network card drivers, I think the most
plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
calling it.
Will dig further...
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
Hi Mathieu,
On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
> indicating it is not reentrant if IRQs are disabled. Since those are
> only stats, I guess it's ok, but still weird.
What is not re-entrant?
On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> Since this shows mostly with network card drivers, I think the most
> plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> calling it.
Yes, this can happen. Are you saying it is not safe to be in the
lockless path when an IRQ triggers?
Hi Mathieu,
On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> > Since this shows mostly with network card drivers, I think the most
> > plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> > calling it.
On Feb 19, 2008 4:21 PM, Pekka Enberg <[email protected]> wrote:
> Yes, this can happen. Are you saying it is not safe to be in the
> lockless path when an IRQ triggers?
Hmm. The barrier() in slab_free() looks fishy. The comment says it's
there to make sure we've retrieved c->freelist before c->page but then
it uses a _compiler barrier_ which doesn't affect the CPU and the
reads may still be re-ordered... Not sure if that matters here though.
* Pekka Enberg <[email protected]> wrote:
> > Yes, this can happen. Are you saying it is not safe to be in the
> > lockless path when an IRQ triggers?
>
> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
> there to make sure we've retrieved c->freelist before c->page but then
> it uses a _compiler barrier_ which doesn't affect the CPU and the
> reads may still be re-ordered... Not sure if that matters here though.
find a fix patch for that below - most systems affected seem to be SMP
ones.
If this (or my other patch) indeed solves the problem i'd still favor a
full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it looks
quite un-cooked and quite un-tested for multiple independent reasons.
Sigh, why do i again have to be the messenger who brings the bad news to
SLUB land, and again when poor Christoph went on vacation? :-/
Ingo
-------------------------->
Subject: SLUB: barrier fix
From: Ingo Molnar <[email protected]>
---
mm/slub.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
Index: linux/mm/slub.c
===================================================================
--- linux.orig/mm/slub.c
+++ linux/mm/slub.c
@@ -1862,7 +1862,7 @@ static __always_inline void slab_free(st
debug_check_no_locks_freed(object, s->objsize);
do {
freelist = c->freelist;
- barrier();
+ smp_mb();
/*
* If the compiler would reorder the retrieval of c->page to
* come before c->freelist then an interrupt could
----------------->
Subject: slub: fastpath optimization revert
From: Ingo Molnar <[email protected]>
Date: Tue Feb 19 15:46:37 CET 2008
revert:
commit 1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c
Author: Christoph Lameter <[email protected]>
Date: Mon Jan 7 23:20:30 2008 -0800
SLUB: Alternate fast paths using cmpxchg_local
it was causing problems (crashes) and was incomplete.
Signed-off-by: Ingo Molnar <[email protected]>
---
mm/slub.c | 87 --------------------------------------------------------------
1 file changed, 87 deletions(-)
Index: linux-x86.q/mm/slub.c
===================================================================
--- linux-x86.q.orig/mm/slub.c
+++ linux-x86.q/mm/slub.c
@@ -149,13 +149,6 @@ static inline void ClearSlabDebug(struct
/* Enable to test recovery from slab corruption on boot */
#undef SLUB_RESILIENCY_TEST
-/*
- * Currently fastpath is not supported if preemption is enabled.
- */
-#if defined(CONFIG_FAST_CMPXCHG_LOCAL) && !defined(CONFIG_PREEMPT)
-#define SLUB_FASTPATH
-#endif
-
#if PAGE_SHIFT <= 12
/*
@@ -1514,11 +1507,6 @@ static void *__slab_alloc(struct kmem_ca
{
void **object;
struct page *new;
-#ifdef SLUB_FASTPATH
- unsigned long flags;
-
- local_irq_save(flags);
-#endif
if (!c->page)
goto new_slab;
@@ -1541,9 +1529,6 @@ load_freelist:
unlock_out:
slab_unlock(c->page);
stat(c, ALLOC_SLOWPATH);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
return object;
another_slab:
@@ -1575,9 +1560,6 @@ new_slab:
c->page = new;
goto load_freelist;
}
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
/*
* No memory available.
*
@@ -1619,34 +1601,6 @@ static __always_inline void *slab_alloc(
{
void **object;
struct kmem_cache_cpu *c;
-
-/*
- * The SLUB_FASTPATH path is provisional and is currently disabled if the
- * kernel is compiled with preemption or if the arch does not support
- * fast cmpxchg operations. There are a couple of coming changes that will
- * simplify matters and allow preemption. Ultimately we may end up making
- * SLUB_FASTPATH the default.
- *
- * 1. The introduction of the per cpu allocator will avoid array lookups
- * through get_cpu_slab(). A special register can be used instead.
- *
- * 2. The introduction of per cpu atomic operations (cpu_ops) means that
- * we can realize the logic here entirely with per cpu atomics. The
- * per cpu atomic ops will take care of the preemption issues.
- */
-
-#ifdef SLUB_FASTPATH
- c = get_cpu_slab(s, raw_smp_processor_id());
- do {
- object = c->freelist;
- if (unlikely(is_end(object) || !node_match(c, node))) {
- object = __slab_alloc(s, gfpflags, node, addr, c);
- break;
- }
- stat(c, ALLOC_FASTPATH);
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
-#else
unsigned long flags;
local_irq_save(flags);
@@ -1661,7 +1615,6 @@ static __always_inline void *slab_alloc(
stat(c, ALLOC_FASTPATH);
}
local_irq_restore(flags);
-#endif
if (unlikely((gfpflags & __GFP_ZERO) && object))
memset(object, 0, c->objsize);
@@ -1698,11 +1651,6 @@ static void __slab_free(struct kmem_cach
void **object = (void *)x;
struct kmem_cache_cpu *c;
-#ifdef SLUB_FASTPATH
- unsigned long flags;
-
- local_irq_save(flags);
-#endif
c = get_cpu_slab(s, raw_smp_processor_id());
stat(c, FREE_SLOWPATH);
slab_lock(page);
@@ -1734,9 +1682,6 @@ checks_ok:
out_unlock:
slab_unlock(page);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
return;
slab_empty:
@@ -1749,9 +1694,6 @@ slab_empty:
}
slab_unlock(page);
stat(c, FREE_SLAB);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
discard_slab(s, page);
return;
@@ -1777,34 +1719,6 @@ static __always_inline void slab_free(st
{
void **object = (void *)x;
struct kmem_cache_cpu *c;
-
-#ifdef SLUB_FASTPATH
- void **freelist;
-
- c = get_cpu_slab(s, raw_smp_processor_id());
- debug_check_no_locks_freed(object, s->objsize);
- do {
- freelist = c->freelist;
- barrier();
- /*
- * If the compiler would reorder the retrieval of c->page to
- * come before c->freelist then an interrupt could
- * change the cpu slab before we retrieve c->freelist. We
- * could be matching on a page no longer active and put the
- * object onto the freelist of the wrong slab.
- *
- * On the other hand: If we already have the freelist pointer
- * then any change of cpu_slab will cause the cmpxchg to fail
- * since the freelist pointers are unique per slab.
- */
- if (unlikely(page != c->page || c->node < 0)) {
- __slab_free(s, page, x, addr, c->offset);
- break;
- }
- object[c->offset] = freelist;
- stat(c, FREE_FASTPATH);
- } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
-#else
unsigned long flags;
local_irq_save(flags);
@@ -1818,7 +1732,6 @@ static __always_inline void slab_free(st
__slab_free(s, page, x, addr, c->offset);
local_irq_restore(flags);
-#endif
}
void kmem_cache_free(struct kmem_cache *s, void *x)
* Ingo Molnar <[email protected]> wrote:
> If this (or my other patch) indeed solves the problem i'd still favor
> a full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it
> looks quite un-cooked and quite un-tested for multiple independent
> reasons.
>
> Sigh, why do i again have to be the messenger who brings the bad news
> to SLUB land, and again when poor Christoph went on vacation? :-/
the revert patch is below. (manually done due to other changes since
1f84260c8ce3b1ce26d4 was commited, but trivial)
Ingo
----------------->
Subject: slub: fastpath optimization revert
From: Ingo Molnar <[email protected]>
Date: Tue Feb 19 15:46:37 CET 2008
revert:
commit 1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c
Author: Christoph Lameter <[email protected]>
Date: Mon Jan 7 23:20:30 2008 -0800
SLUB: Alternate fast paths using cmpxchg_local
it was causing problems (crashes) and was incomplete.
Signed-off-by: Ingo Molnar <[email protected]>
---
mm/slub.c | 87 --------------------------------------------------------------
1 file changed, 87 deletions(-)
Index: linux-x86.q/mm/slub.c
===================================================================
--- linux-x86.q.orig/mm/slub.c
+++ linux-x86.q/mm/slub.c
@@ -149,13 +149,6 @@ static inline void ClearSlabDebug(struct
/* Enable to test recovery from slab corruption on boot */
#undef SLUB_RESILIENCY_TEST
-/*
- * Currently fastpath is not supported if preemption is enabled.
- */
-#if defined(CONFIG_FAST_CMPXCHG_LOCAL) && !defined(CONFIG_PREEMPT)
-#define SLUB_FASTPATH
-#endif
-
#if PAGE_SHIFT <= 12
/*
@@ -1514,11 +1507,6 @@ static void *__slab_alloc(struct kmem_ca
{
void **object;
struct page *new;
-#ifdef SLUB_FASTPATH
- unsigned long flags;
-
- local_irq_save(flags);
-#endif
if (!c->page)
goto new_slab;
@@ -1541,9 +1529,6 @@ load_freelist:
unlock_out:
slab_unlock(c->page);
stat(c, ALLOC_SLOWPATH);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
return object;
another_slab:
@@ -1575,9 +1560,6 @@ new_slab:
c->page = new;
goto load_freelist;
}
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
/*
* No memory available.
*
@@ -1619,34 +1601,6 @@ static __always_inline void *slab_alloc(
{
void **object;
struct kmem_cache_cpu *c;
-
-/*
- * The SLUB_FASTPATH path is provisional and is currently disabled if the
- * kernel is compiled with preemption or if the arch does not support
- * fast cmpxchg operations. There are a couple of coming changes that will
- * simplify matters and allow preemption. Ultimately we may end up making
- * SLUB_FASTPATH the default.
- *
- * 1. The introduction of the per cpu allocator will avoid array lookups
- * through get_cpu_slab(). A special register can be used instead.
- *
- * 2. The introduction of per cpu atomic operations (cpu_ops) means that
- * we can realize the logic here entirely with per cpu atomics. The
- * per cpu atomic ops will take care of the preemption issues.
- */
-
-#ifdef SLUB_FASTPATH
- c = get_cpu_slab(s, raw_smp_processor_id());
- do {
- object = c->freelist;
- if (unlikely(is_end(object) || !node_match(c, node))) {
- object = __slab_alloc(s, gfpflags, node, addr, c);
- break;
- }
- stat(c, ALLOC_FASTPATH);
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
-#else
unsigned long flags;
local_irq_save(flags);
@@ -1661,7 +1615,6 @@ static __always_inline void *slab_alloc(
stat(c, ALLOC_FASTPATH);
}
local_irq_restore(flags);
-#endif
if (unlikely((gfpflags & __GFP_ZERO) && object))
memset(object, 0, c->objsize);
@@ -1698,11 +1651,6 @@ static void __slab_free(struct kmem_cach
void **object = (void *)x;
struct kmem_cache_cpu *c;
-#ifdef SLUB_FASTPATH
- unsigned long flags;
-
- local_irq_save(flags);
-#endif
c = get_cpu_slab(s, raw_smp_processor_id());
stat(c, FREE_SLOWPATH);
slab_lock(page);
@@ -1734,9 +1682,6 @@ checks_ok:
out_unlock:
slab_unlock(page);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
return;
slab_empty:
@@ -1749,9 +1694,6 @@ slab_empty:
}
slab_unlock(page);
stat(c, FREE_SLAB);
-#ifdef SLUB_FASTPATH
- local_irq_restore(flags);
-#endif
discard_slab(s, page);
return;
@@ -1777,34 +1719,6 @@ static __always_inline void slab_free(st
{
void **object = (void *)x;
struct kmem_cache_cpu *c;
-
-#ifdef SLUB_FASTPATH
- void **freelist;
-
- c = get_cpu_slab(s, raw_smp_processor_id());
- debug_check_no_locks_freed(object, s->objsize);
- do {
- freelist = c->freelist;
- barrier();
- /*
- * If the compiler would reorder the retrieval of c->page to
- * come before c->freelist then an interrupt could
- * change the cpu slab before we retrieve c->freelist. We
- * could be matching on a page no longer active and put the
- * object onto the freelist of the wrong slab.
- *
- * On the other hand: If we already have the freelist pointer
- * then any change of cpu_slab will cause the cmpxchg to fail
- * since the freelist pointers are unique per slab.
- */
- if (unlikely(page != c->page || c->node < 0)) {
- __slab_free(s, page, x, addr, c->offset);
- break;
- }
- object[c->offset] = freelist;
- stat(c, FREE_FASTPATH);
- } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
-#else
unsigned long flags;
local_irq_save(flags);
@@ -1818,7 +1732,6 @@ static __always_inline void slab_free(st
__slab_free(s, page, x, addr, c->offset);
local_irq_restore(flags);
-#endif
}
void kmem_cache_free(struct kmem_cache *s, void *x)
Ingo Molnar wrote:
> * Pekka Enberg <[email protected]> wrote:
>
>>> Yes, this can happen. Are you saying it is not safe to be in the
>>> lockless path when an IRQ triggers?
>> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
>> there to make sure we've retrieved c->freelist before c->page but then
>> it uses a _compiler barrier_ which doesn't affect the CPU and the
>> reads may still be re-ordered... Not sure if that matters here though.
>
> find a fix patch for that below - most systems affected seem to be SMP
> ones.
>
> If this (or my other patch) indeed solves the problem i'd still favor a
> full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it looks
> quite un-cooked and quite un-tested for multiple independent reasons.
>
> Sigh, why do i again have to be the messenger who brings the bad news to
> SLUB land, and again when poor Christoph went on vacation? :-/
>
> Ingo
>
> -------------------------->
> Subject: SLUB: barrier fix
> From: Ingo Molnar <[email protected]>
>
> ---
> mm/slub.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux/mm/slub.c
> ===================================================================
> --- linux.orig/mm/slub.c
> +++ linux/mm/slub.c
> @@ -1862,7 +1862,7 @@ static __always_inline void slab_free(st
> debug_check_no_locks_freed(object, s->objsize);
> do {
> freelist = c->freelist;
> - barrier();
> + smp_mb();
> /*
> * If the compiler would reorder the retrieval of c->page to
> * come before c->freelist then an interrupt could
Torsten/Yamin, does this fix things for you? What about reverting commit
1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c ("SLUB: Alternate fast paths
using cmpxchg_local")?
Pekka
Ingo Molnar wrote:
> * Ingo Molnar <[email protected]> wrote:
>
>> If this (or my other patch) indeed solves the problem i'd still favor
>> a full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it
>> looks quite un-cooked and quite un-tested for multiple independent
>> reasons.
>>
>> Sigh, why do i again have to be the messenger who brings the bad news
>> to SLUB land, and again when poor Christoph went on vacation? :-/
>
> the revert patch is below. (manually done due to other changes since
> 1f84260c8ce3b1ce26d4 was commited, but trivial)
I am ok with this if someone can actually confirm it fixes things.
Pekka
On Tue, 19 Feb 2008, Pekka Enberg wrote:
>
> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
> there to make sure we've retrieved c->freelist before c->page but then
> it uses a _compiler barrier_ which doesn't affect the CPU and the
> reads may still be re-ordered... Not sure if that matters here though.
No, no. The comment says that it's purely there to serialize an
*interrupt*, and as such, a compiler-only barrier is sufficient (or the
comment is wrong).
Interrupts are "totally ordered" within a cpu (of course, in theory a CPU
might have speculative work etc reordering, but the CPU also guarantees
that interrupt acts _as_if_ it was exact), so a compiler barrier is
sufficient.
Of course, if we're talking about interrupts on another CPU, that's a
different issue, but the fact is, in that case it's not about interrupts
any more (might as well be other code just running normally on another
CPU), and a barrier doesn't help, it needs real locking.
So that barrier is fine per se. Of course, the whole code (and/or just the
comment!) may be buggered, but any CPU SMP-aware barriers shouldn't be
relevant.
What's much more likely to be an issue is simply the fact that since the
fastpath now accesses the per-cpu freelist without any locking, if there
is *any* sequence what-so-ever that does it from another CPU and assumes
the old locking behaviour, the list will be corrupted. And from a quick
look-through, I certainly cannot guarantee that isn't the case.
There's still a lot of cases that do direct assignments to "c->freelist"
without using a guaranteed atomic sequence. They *should* be safe if it's
guaranteed that
(a) they always run with interrupts disabled
AND
(b) 'c' is _always_ the "current CPU" list
but I can't quickly see that guarantee for either.
I'd happily just revert this thing, but it would be really good to have
confirmation that it seems to matter. But Torsten's partial bisection
seems to say that the quicklist thing went into -mm before the crash even
started.
So:
- it might be something else entirely
- it might still be the local cmpxchg, just Torsten didn't happen to
notice it until later.
- it might still be the local cmpxchg, but something else changed its
patterns to actually make it start triggering.
and in general I don't think we should revert it unless we have stronger
indications that it really is the problem (eg somebody finds the actual
bug, or a reporter can confirm that it goes away when the local cmpxchg
optimization is disabled).
Linus
On Tue, 19 Feb 2008 09:02:30 -0500
Mathieu Desnoyers <[email protected]> wrote:
> * Pekka Enberg ([email protected]) wrote:
> > On Feb 19, 2008 8:54 AM, Torsten Kaiser <[email protected]> wrote:
> > > > > [ 5282.056415] ------------[ cut here ]------------
> > > > > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> > > > > [ 5282.062055] invalid opcode: 0000 [1] SMP
> > > > > [ 5282.062055] CPU 3
> > > >
> > > > hm. Your crashes do seem to span multiple subsystems, but it always
> > > > seems to be around the SLUB code. Could you try the patch below? The
> > > > SLUB code has a new optimization and i'm not 100% sure about it. [the
> > > > hack below switches the SLUB optimization off by disabling the CPU
> > > > feature it relies on.]
> > > >
> > > > Ingo
> > > >
> > > > ------------->
> > > > arch/x86/Kconfig | 4 ----
> > > > 1 file changed, 4 deletions(-)
> > > >
> > > > Index: linux/arch/x86/Kconfig
> > > > ===================================================================
> > > > --- linux.orig/arch/x86/Kconfig
> > > > +++ linux/arch/x86/Kconfig
> > > > @@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
> > > > config SEMAPHORE_SLEEPERS
> > > > def_bool y
> > > >
> > > > -config FAST_CMPXCHG_LOCAL
> > > > - bool
> > > > - default y
> > > > -
> > > > config MMU
> > > > def_bool y
> > > >
> > >
> > > $ grep FAST_CMPXCHG_LOCAL */.config
> > > linux-2.6.24-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.24-rc3-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.24-rc3-mm2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.24-rc6-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.24-rc8-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.25-rc1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.25-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > linux-2.6.25-rc2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > >
> > > -rc2-mm1 still worked for me.
> > >
> > > Did you mean the new SLUB_FASTPATH?
> > > $ grep "define SLUB_FASTPATH" */mm/slub.c
> > > linux-2.6.25-rc1/mm/slub.c:#define SLUB_FASTPATH
> > > linux-2.6.25-rc2-mm1/mm/slub.c:#define SLUB_FASTPATH
> > > linux-2.6.25-rc2/mm/slub.c:#define SLUB_FASTPATH
> > >
> > > The 2.6.24-rc3+ mm-kernels did crash for me, but don't seem to contain this...
> > >
> > > On the other hand:
> > > From the crash in 2.6.25-rc2-mm1:
> > > [59987.116182] RIP [<ffffffff8029f83d>] kmem_cache_alloc_node+0x6d/0xa0
> > >
> > > (gdb) list *0xffffffff8029f83d
> > > 0xffffffff8029f83d is in kmem_cache_alloc_node (mm/slub.c:1646).
> > > 1641 if (unlikely(is_end(object) || !node_match(c, node))) {
> > > 1642 object = __slab_alloc(s, gfpflags,
> > > node, addr, c);
> > > 1643 break;
> > > 1644 }
> > > 1645 stat(c, ALLOC_FASTPATH);
> > > 1646 } while (cmpxchg_local(&c->freelist, object, object[c->offset])
> > > 1647
> > > != object);
> > > 1648 #else
> > > 1649 unsigned long flags;
> > > 1650
> > >
> > > That code is part for SLUB_FASTPATH.
> > >
> > > I'm willing to test the patch, but don't know how fast I can find the
> > > time to do it, so my answer if your patch helps might be delayed until
> > > the weekend.
> >
> > Mathieu, Christoph is on vacation and I'm not at all that familiar
> > with this cmpxchg_local() optimization, so if you could take a peek at
> > this bug report to see if you can spot something obviously wrong with
> > it, I would much appreciate that.
>
> Sure,
>
> Initial thoughts :
>
> I'd like to get the complete config causing this bug. I suspect either :
>
> - A race between the lockless algo and an IRQ in a driver allocating
> memory.
> - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
> indicating it is not reentrant if IRQs are disabled. Since those are
> only stats, I guess it's ok, but still weird.
> - CPU hotplug problem.
> http://bugzilla.kernel.org/attachment.cgi?id=14877&action=view shows
> last sysfs file:
> /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
> -- is this linked to a cpu up/down event ?
>
> Since this shows mostly with network card drivers, I think the most
> plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> calling it.
>
> Will dig further...
I wonder how SLUB_FASTPATH is supposed to work, since it is affected by
a classical ABA problem of lockless algo.
cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed,
while an interrupt came (on this cpu), and several allocations were done,
and one free was performed at the end of this interruption, so 'object'
was recycled.
c->freelist can then contain the previous value (object), but
object[c->offset] was changed by IRQ.
We then put back in freelist an already allocated object.
On Tue, 19 Feb 2008, Eric Dumazet wrote:
>
> cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed,
> while an interrupt came (on this cpu), and several allocations were done,
> and one free was performed at the end of this interruption, so 'object'
> was recycled.
I think you may well be right. This looks like a good clue.
I'll do the revert. I wanted either a confirmation that reveting it
actually fixes something, _or_ an actual bug description, and this seems
to be a quite possible case of the latter.
Linus
* Linus Torvalds <[email protected]> wrote:
> So:
> - it might be something else entirely
> - it might still be the local cmpxchg, just Torsten didn't happen to
> notice it until later.
> - it might still be the local cmpxchg, but something else changed its
> patterns to actually make it start triggering.
>
> and in general I don't think we should revert it unless we have
> stronger indications that it really is the problem (eg somebody finds
> the actual bug, or a reporter can confirm that it goes away when the
> local cmpxchg optimization is disabled).
yeah - my revert suggestions were all completely conditional on such
type of test feedback.
Btw., i did trigger occasional SLUB crashes myself starting at around
-rc1, on the order of one per 200-300 straight random bootups, and
yesterday i did a 50-bootups series of a specific .config that crashed,
to try to reproduce one of them but failed - so bisection was not an
option and i had nothing concrete and repeatable to report either. I had
a few complete lockups and only 3 usable backtraces - find them below.
Networking features in all of the backtraces - and so does the VFS. All
of the crashes are on SMP - and given that 50% of the bootups are UP
this gives us a 1:8 chance hint that this bug is SMP specific. (All the
crashes are in distccd - that is what this build cluster does mainly so
it's the main activity of the box - so they dont necessarily indicate
anything workload specific.)
Earlier today i turned off local-cmpxchg and havent had a crash or hang
since then - but at 200 bootups and 4-5 crashes in a week that's not
conclusive yet. I think others might have workloads that trigger this
bug more often.
Ingo
---------------->
mercury login: [ 582.671916] Oops: 0000 [#1] SMP DEBUG_PAGEALLOC
[ 582.672334]
[ 582.672334] Pid: 3776, comm: distccd Not tainted (2.6.25-rc2 #5)
[ 582.672334] EIP: 0060:[<c0174fda>] EFLAGS: 00010246 CPU: 0
[ 582.672334] EIP is at kmem_cache_alloc+0x2a/0x90
[ 582.672334] EAX: 00000000 EBX: 8000061c ECX: c069ed1c EDX: 01060002
[ 582.672334] ESI: c0aeffc8 EDI: c1d11714 EBP: f6eddcdc ESP: f6eddcc4
[ 582.672334] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 582.672334] Process distccd (pid: 3776, ti=f6edc000 task=f508c000 task.ti=f6edc000)
[ 582.672334] Stack: c06a3d48 f6eddce4 00000020 8000061c 0000066c c0aeffc8 f6eddcf8 c069ed1c
[ 582.672334] 00000000 00000020 8000061c f7ce6580 f7ce6580 f6eddd18 c045e7bb ffffffff
[ 582.672334] 00000000 f7f683e0 8000061c f52136c0 f7ce6580 f6eddd58 c0461de5 f508c000
[ 582.672334] Call Trace:
[ 582.672334] [<c06a3d48>] ? netif_receive_skb+0x2a8/0x320
[ 582.672334] [<c069ed1c>] ? __alloc_skb+0x2c/0x110
[ 582.672334] [<c045e7bb>] ? nv_alloc_rx_optimized+0x10b/0x1a0
[ 582.672334] [<c0461de5>] ? nv_napi_poll+0x1b5/0x730
[ 582.672334] [<c06a62cb>] ? net_rx_action+0x16b/0x200
[ 582.672334] [<c06a61e8>] ? net_rx_action+0x88/0x200
[ 582.672334] [<c012d713>] ? __do_softirq+0x93/0x120
[ 582.672334] [<c012d7f7>] ? do_softirq+0x57/0x60
[ 582.672334] [<c012dcc9>] ? irq_exit+0x69/0x80
[ 582.672334] [<c0106325>] ? do_IRQ+0x45/0x80
[ 582.672334] [<c018a2a2>] ? d_instantiate+0x42/0x60
[ 582.672334] [<c0103fd8>] ? common_interrupt+0x28/0x30
[ 582.672334] [<c018a2a2>] ? d_instantiate+0x42/0x60
[ 582.672334] [<c0149e50>] ? lock_release+0xc0/0x1b0
[ 582.672334] [<c07d0816>] ? _spin_unlock+0x16/0x20
[ 582.672334] [<c018a2a2>] ? d_instantiate+0x42/0x60
[ 582.672334] [<c0202a84>] ? ext3_add_nondir+0x34/0x50
[ 582.672334] [<c0202fde>] ? ext3_create+0x9e/0xe0
[ 582.672334] [<c0181498>] ? vfs_create+0xb8/0x100
[ 582.672334] [<c01838c0>] ? open_namei+0x4d0/0x5a0
[ 582.672334] [<c0136346>] ? in_group_p+0x26/0x30
[ 582.672334] [<c020cd40>] ? ext3_permission+0x0/0x10
[ 582.672334] [<c01770c1>] ? do_filp_open+0x31/0x50
[ 582.672334] [<c07d081d>] ? _spin_unlock+0x1d/0x20
[ 582.672334] [<c0176e1b>] ? get_unused_fd_flags+0xbb/0xe0
[ 582.672334] [<c017712d>] ? do_sys_open+0x4d/0xf0
[ 582.672334] [<c0327894>] ? trace_hardirqs_on_thunk+0xc/0x10
[ 582.672334] [<c014869d>] ? trace_hardirqs_on_caller+0xbd/0x140
[ 582.672334] [<c017720c>] ? sys_open+0x1c/0x20
[ 582.672334] [<c0102fc6>] ? sysenter_past_esp+0x5f/0x99
[ 582.672334] =======================
[ 582.672334] Code: c3 55 89 e5 57 56 89 c6 53 83 ec 0c 8b 4d 04 89 55 f0 64 a1 04 40 b7 c0 8b 7c 86 64 90 8d 74 26 00 8b 17 f6 c2 01 75 41 8b 47 0c <8b> 1c 82 89 d0 0f b1 1f 39 d0 89 c3 75 e8 66 83 7d f0 00 79 1f
[ 582.672334] EIP: [<c0174fda>] kmem_cache_alloc+0x2a/0x90 SS:ESP 0068:f6eddcc4
[ 582.672343] Kernel panic - not syncing: Fatal exception in interrupt
[ 582.673337] Pid: 3776, comm: distccd Tainted: G D 2.6.25-rc2 #5
[ 582.674342] [<c0128516>] panic+0x46/0x120
[ 582.676335] [<c0104be4>] die+0x134/0x150
[ 582.678335] [<c01182a8>] do_page_fault+0x188/0x610
[ 582.680335] [<c06c6016>] ? ip_local_deliver+0xf6/0x1c0
[ 582.682335] [<c0118120>] ? do_page_fault+0x0/0x610
[ 582.685334] [<c07d0f82>] error_code+0x72/0x80
[ 582.687334] [<c069ed1c>] ? __alloc_skb+0x2c/0x110
[ 582.689334] [<c0174fda>] ? kmem_cache_alloc+0x2a/0x90
[ 582.691333] [<c06a3d48>] ? netif_receive_skb+0x2a8/0x320
[ 582.693333] [<c069ed1c>] __alloc_skb+0x2c/0x110
[ 582.695333] [<c045e7bb>] nv_alloc_rx_optimized+0x10b/0x1a0
[ 582.697332] [<c0461de5>] nv_napi_poll+0x1b5/0x730
[ 582.699332] [<c06a62cb>] net_rx_action+0x16b/0x200
[ 582.701332] [<c06a61e8>] ? net_rx_action+0x88/0x200
[ 582.703331] [<c012d713>] __do_softirq+0x93/0x120
[ 582.705331] [<c012d7f7>] do_softirq+0x57/0x60
[ 582.707331] [<c012dcc9>] irq_exit+0x69/0x80
[ 582.709330] [<c0106325>] do_IRQ+0x45/0x80
[ 582.711330] [<c018a2a2>] ? d_instantiate+0x42/0x60
[ 582.713330] [<c0103fd8>] common_interrupt+0x28/0x30
[ 582.715336] [<c018a2a2>] ? d_instantiate+0x42/0x60
[ 582.717329] [<c0149e50>] ? lock_release+0xc0/0x1b0
[ 582.719335] [<c07d0816>] _spin_unlock+0x16/0x20
[ 582.721329] [<c018a2a2>] d_instantiate+0x42/0x60
[ 582.723335] [<c0202a84>] ext3_add_nondir+0x34/0x50
[ 582.725328] [<c0202fde>] ext3_create+0x9e/0xe0
[ 582.727334] [<c0181498>] vfs_create+0xb8/0x100
[ 582.729327] [<c01838c0>] open_namei+0x4d0/0x5a0
[ 582.731333] [<c0136346>] ? in_group_p+0x26/0x30
[ 582.733327] [<c020cd40>] ? ext3_permission+0x0/0x10
[ 582.735333] [<c01770c1>] do_filp_open+0x31/0x50
[ 582.737326] [<c07d081d>] ? _spin_unlock+0x1d/0x20
[ 582.740332] [<c0176e1b>] ? get_unused_fd_flags+0xbb/0xe0
[ 582.743325] [<c017712d>] do_sys_open+0x4d/0xf0
[ 582.745331] [<c0327894>] ? trace_hardirqs_on_thunk+0xc/0x10
[ 582.747325] [<c014869d>] ? trace_hardirqs_on_caller+0xbd/0x140
[ 582.750330] [<c017720c>] sys_open+0x1c/0x20
[ 582.752324] [<c0102fc6>] sysenter_past_esp+0x5f/0x99
[ 582.754330] =======================
[ 582.755327] Rebooting in 10 seconds..Press any key to enter the menu
..............
Kernel 2.6.25-rc1 on an i686
mercury login: [ 96.080075] Oops: 0000 [#1] SMP
[ 96.083484] Modules linked in:
[ 96.086680]
[ 96.088225] Pid: 3414, comm: distccd Not tainted (2.6.25-rc1 #640)
[ 96.090000] EIP: 0060:[<8015a5fc>] EFLAGS: 00010246 CPU: 0
[ 96.090000] EIP is at kmem_cache_alloc+0x3a/0x78
[ 96.090000] EAX: 00000000 EBX: 00000110 ECX: 8056aaae EDX: 01060002
[ 96.090000] ESI: 808e6de8 EDI: 819071a4 EBP: 9f13dd20 ESP: 9f13dd10
[ 96.090000] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 96.090000] Process distccd (pid: 3414, ti=9f13c000 task=9f0eae00 task.ti=9f13c000)
[ 96.090000] Stack: 00000020 00000110 00000020 9f2dccc0 9f13dd44 8056aaae 9ed86480 00000000
[ 96.090000] 808e6de8 8056c0a6 9ed86480 9ed86480 9f2dccc0 9f13dd58 805a093b ffffffff
[ 96.090000] 9ed86480 00000000 9f13dd68 8059e40b 9f2dcce0 9ed86480 9f13dda0 8059f6d3
[ 96.090000] Call Trace:
[ 96.090000] [<8056aaae>] ? __alloc_skb+0x29/0x107
[ 96.090000] [<8056c0a6>] ? skb_copy_datagram_iovec+0x4a/0x196
[ 96.090000] [<805a093b>] ? tcp_send_ack+0x25/0xb6
[ 96.090000] [<8059e40b>] ? __tcp_ack_snd_check+0x5e/0x73
[ 96.090000] [<8059f6d3>] ? tcp_rcv_established+0x3ad/0x66a
[ 96.090000] [<801442a5>] ? generic_file_buffered_write+0x14b/0x4cb
[ 96.090000] [<805a4a7d>] ? tcp_v4_do_rcv+0x255/0x3c3
[ 96.090000] [<80567c59>] ? sk_wait_data+0x89/0x98
[ 96.090000] [<80596da7>] ? tcp_prequeue_process+0x56/0x6b
[ 96.090000] [<80598d3f>] ? tcp_recvmsg+0x36c/0x6b3
[ 96.090000] [<80566ea7>] ? sock_common_recvmsg+0x31/0x4a
[ 96.090000] [<80565318>] ? sock_aio_read+0xce/0xd8
[ 96.090000] [<80144a8b>] ? generic_file_aio_write+0x62/0xb4
[ 96.090000] [<8015e1ee>] ? do_sync_read+0xbe/0xfc
[ 96.090000] [<8012d8c5>] ? autoremove_wake_function+0x0/0x30
[ 96.090000] [<8015ce82>] ? do_filp_open+0x2e/0x35
[ 96.090000] [<802f5575>] ? security_file_permission+0xf/0x11
[ 96.090000] [<8015e7e2>] ? vfs_read+0x7d/0x91
[ 96.090000] [<8015eb5e>] ? sys_read+0x3b/0x60
[ 96.090000] [<801029d2>] ? sysenter_past_esp+0x5f/0x85
[ 96.090000] =======================
[ 96.090000] Code: 55 f0 64 a1 04 b0 93 80 8b 7c 86 74 8b 17 f6 c2 01 74 15 8b 55 f0 89 f0 57 51 83 c9 ff e8 25 fa ff ff 5e 89 c3 58 eb 11 8b 47 0c <8b> 1c 82 89 d0 0f b1 1f 39 d0 89 c3 75 d3 66 83 7d f0 00 79 1f
[ 96.090000] EIP: [<8015a5fc>] kmem_cache_alloc+0x3a/0x78 SS:ESP 0068:9f13dd10
[ 96.090008] Kernel panic - not syncing: Fatal exception in interrupt
[ 96.096472] Rebooting in 10 seconds..Press any key to enter the menu
..............
Kernel 2.6.25-rc1 on an i686
mercury login: [ 65.446421] Oops: 0000 [#1] SMP
[ 65.448090] Modules linked in:
[ 65.448090]
[ 65.448090] Pid: 3650, comm: distccd Not tainted (2.6.25-rc1 #15)
[ 65.448090] EIP: 0060:[<7816f4fa>] EFLAGS: 00010246 CPU: 0
[ 65.448090] EIP is at kmem_cache_alloc+0x3a/0x80
[ 65.448090] EAX: 00000000 EBX: 0000066c ECX: 78420580 EDX: 00000000
[ 65.448090] ESI: 78757d48 EDI: 79e57880 EBP: 787ebf3c ESP: 787ebf2c
[ 65.448090] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068
[ 65.448090] Process distccd (pid: 3650, ti=787eb000 task=b5e90000 task.ti=b5e64000)
[ 65.448090] Stack: 00000020 0000066c 78757d48 00000000 787ebf60 78420580 b0d17f00 00000000
[ 65.448090] 00000020 787ebf64 b73454a0 b737c610 00000000 787ebf74 782fe022 ffffffff
[ 65.448090] 8000061c b7b13cc0 787ebfa8 78301176 00000040 b73454c4 b73454a0 b7345000
[ 65.448090] Call Trace:
[ 65.448090] [<78420580>] ? __alloc_skb+0x30/0x110
[ 65.448090] [<782fe022>] ? nv_alloc_rx_optimized+0x42/0x140
[ 65.448090] [<78301176>] ? nv_napi_poll+0x526/0x5f0
[ 65.448090] [<78426a7d>] ? net_rx_action+0xbd/0x1f0
[ 65.448090] [<7812684b>] ? __do_softirq+0x7b/0x100
[ 65.448090] [<781062ba>] ? do_softirq+0x5a/0xa0
[ 65.448090] [<78151510>] ? handle_level_irq+0x0/0xd0
[ 65.448090] [<781267c4>] ? irq_exit+0x44/0x50
[ 65.448090] [<7810639e>] ? do_IRQ+0x9e/0xc0
[ 65.448090] [<78104b68>] ? common_interrupt+0x28/0x30
[ 65.448090] [<78122503>] ? release_console_sem+0x1a3/0x1c0
[ 65.448090] [<78122a32>] ? vprintk+0x322/0x350
[ 65.448090] [<78122a75>] ? printk+0x15/0x20
[ 65.448090] [<781136a1>] ? dump_pagetable+0x21/0x80
[ 65.448090] [<785313bb>] ? do_page_fault+0x46b/0x540
[ 65.448090] [<78530f50>] ? do_page_fault+0x0/0x540
[ 65.448090] [<7852faa2>] ? error_code+0x72/0x80
[ 65.448090] [<78171a2f>] ? sys_close+0x5f/0xb0
[ 65.448090] [<781a0511>] ? dnotify_flush+0x11/0x80
[ 65.448090] [<781706d0>] ? filp_close+0x40/0x60
[ 65.448090] [<78171a38>] ? sys_close+0x68/0xb0
[ 65.448090] [<78103b26>] ? sysenter_past_esp+0x5f/0x99
[ 65.448090] =======================
[ 65.448090] Code: 4d 04 64 a1 04 90 79 78 8b 7c 86 64 8b 17 f6 c2 01 74 15 57 51 83 c9 ff 8b 55 f0 89 f0 e8 7f fc ff ff 89 c3 58 5a eb 11 8b 47 0c <8b> 1c 82 89 d0 0f b1 1f 89 c3 39 d0 75 d3 66 83 7d f0 00 79 1f
[ 65.448090] EIP: [<7816f4fa>] kmem_cache_alloc+0x3a/0x80 SS:ESP 0068:787ebf2c
[ 65.448101] Kernel panic - not syncing: Fatal exception in interrupt
[ 65.452102] Rebooting in 10 seconds..Press any key to enter the menu
* Ingo Molnar <[email protected]> wrote:
> Earlier today i turned off local-cmpxchg and havent had a crash or
> hang since then - but at 200 bootups and 4-5 crashes in a week that's
> not conclusive yet. I think others might have workloads that trigger
> this bug more often.
i mean, today i've only done 200 randconfig bootups since i did the
cmpxchg SLUB revert, and given the statistics of the bug (thousands of
bootups and just 3 provable crashes) i cannot yet conclude that the bug
is truly gone.
Ingo
On Feb 19, 2008 3:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> Sure,
>
> Initial thoughts :
>
> I'd like to get the complete config causing this bug. I suspect either :
The .config I used in 2.6.25-rc2 is attached.
> - A race between the lockless algo and an IRQ in a driver allocating
> memory.
> - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
> indicating it is not reentrant if IRQs are disabled. Since those are
> only stats, I guess it's ok, but still weird.
> - CPU hotplug problem.
> http://bugzilla.kernel.org/attachment.cgi?id=14877&action=view shows
> last sysfs file:
> /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
> -- is this linked to a cpu up/down event ?
# CONFIG_HOTPLUG_CPU is not set
I expect my system would get rather angry if I try to remove a cpu
while it is running. ;)
And as I don't use suspend, I wanted to stay away from any bugs that
might result from this.
> Since this shows mostly with network card drivers, I think the most
> plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> calling it.
Thanks to yanmin crashing his machine with hackbench I now have a much
better testcase than recompiling KDE.
Starting hackbench will result in an nearly instant crash, if there is
a floodping running against the system.
This new testcase also showed that 2.6.24-rc2-mm1 can also be crashed
in this way.
I will try the patches from this tread against this new testcase and
report the results.
Torsten
On Feb 19, 2008 5:20 PM, Linus Torvalds <[email protected]> wrote:
> So:
> - it might be something else entirely
> - it might still be the local cmpxchg, just Torsten didn't happen to
> notice it until later.
My new hackbench-testcase also killed 2.6.24-rc2-mm1, so I really
noticed to late.
> - it might still be the local cmpxchg, but something else changed its
> patterns to actually make it start triggering.
>
> and in general I don't think we should revert it unless we have stronger
> indications that it really is the problem (eg somebody finds the actual
> bug, or a reporter can confirm that it goes away when the local cmpxchg
> optimization is disabled).
I tried the following three patches:
switching the barrier() for a smp_mb() in 2.6.25-rc2-mm1:
-> crashed
reverting the FASTPATH-patch in 2.6.25-rc2:
-> worked
only removed FAST_CMPXCHG_LOCAL from arch/x86/Kconfig
-> worked
So all of these tests seem to confirm, that the bug is in the new SLUB fastpath.
Torsten
* Eric Dumazet ([email protected]) wrote:
> On Tue, 19 Feb 2008 09:02:30 -0500
> Mathieu Desnoyers <[email protected]> wrote:
>
> > * Pekka Enberg ([email protected]) wrote:
> > > On Feb 19, 2008 8:54 AM, Torsten Kaiser <[email protected]> wrote:
> > > > > > [ 5282.056415] ------------[ cut here ]------------
> > > > > > [ 5282.059757] kernel BUG at lib/list_debug.c:33!
> > > > > > [ 5282.062055] invalid opcode: 0000 [1] SMP
> > > > > > [ 5282.062055] CPU 3
> > > > >
> > > > > hm. Your crashes do seem to span multiple subsystems, but it always
> > > > > seems to be around the SLUB code. Could you try the patch below? The
> > > > > SLUB code has a new optimization and i'm not 100% sure about it. [the
> > > > > hack below switches the SLUB optimization off by disabling the CPU
> > > > > feature it relies on.]
> > > > >
> > > > > Ingo
> > > > >
> > > > > ------------->
> > > > > arch/x86/Kconfig | 4 ----
> > > > > 1 file changed, 4 deletions(-)
> > > > >
> > > > > Index: linux/arch/x86/Kconfig
> > > > > ===================================================================
> > > > > --- linux.orig/arch/x86/Kconfig
> > > > > +++ linux/arch/x86/Kconfig
> > > > > @@ -59,10 +59,6 @@ config HAVE_LATENCYTOP_SUPPORT
> > > > > config SEMAPHORE_SLEEPERS
> > > > > def_bool y
> > > > >
> > > > > -config FAST_CMPXCHG_LOCAL
> > > > > - bool
> > > > > - default y
> > > > > -
> > > > > config MMU
> > > > > def_bool y
> > > > >
> > > >
> > > > $ grep FAST_CMPXCHG_LOCAL */.config
> > > > linux-2.6.24-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.24-rc3-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.24-rc3-mm2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.24-rc6-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.24-rc8-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.25-rc1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.25-rc2-mm1/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > > linux-2.6.25-rc2/.config:CONFIG_FAST_CMPXCHG_LOCAL=y
> > > >
> > > > -rc2-mm1 still worked for me.
> > > >
> > > > Did you mean the new SLUB_FASTPATH?
> > > > $ grep "define SLUB_FASTPATH" */mm/slub.c
> > > > linux-2.6.25-rc1/mm/slub.c:#define SLUB_FASTPATH
> > > > linux-2.6.25-rc2-mm1/mm/slub.c:#define SLUB_FASTPATH
> > > > linux-2.6.25-rc2/mm/slub.c:#define SLUB_FASTPATH
> > > >
> > > > The 2.6.24-rc3+ mm-kernels did crash for me, but don't seem to contain this...
> > > >
> > > > On the other hand:
> > > > From the crash in 2.6.25-rc2-mm1:
> > > > [59987.116182] RIP [<ffffffff8029f83d>] kmem_cache_alloc_node+0x6d/0xa0
> > > >
> > > > (gdb) list *0xffffffff8029f83d
> > > > 0xffffffff8029f83d is in kmem_cache_alloc_node (mm/slub.c:1646).
> > > > 1641 if (unlikely(is_end(object) || !node_match(c, node))) {
> > > > 1642 object = __slab_alloc(s, gfpflags,
> > > > node, addr, c);
> > > > 1643 break;
> > > > 1644 }
> > > > 1645 stat(c, ALLOC_FASTPATH);
> > > > 1646 } while (cmpxchg_local(&c->freelist, object, object[c->offset])
> > > > 1647
> > > > != object);
> > > > 1648 #else
> > > > 1649 unsigned long flags;
> > > > 1650
> > > >
> > > > That code is part for SLUB_FASTPATH.
> > > >
> > > > I'm willing to test the patch, but don't know how fast I can find the
> > > > time to do it, so my answer if your patch helps might be delayed until
> > > > the weekend.
> > >
> > > Mathieu, Christoph is on vacation and I'm not at all that familiar
> > > with this cmpxchg_local() optimization, so if you could take a peek at
> > > this bug report to see if you can spot something obviously wrong with
> > > it, I would much appreciate that.
> >
> > Sure,
> >
> > Initial thoughts :
> >
> > I'd like to get the complete config causing this bug. I suspect either :
> >
> > - A race between the lockless algo and an IRQ in a driver allocating
> > memory.
> > - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
> > indicating it is not reentrant if IRQs are disabled. Since those are
> > only stats, I guess it's ok, but still weird.
> > - CPU hotplug problem.
> > http://bugzilla.kernel.org/attachment.cgi?id=14877&action=view shows
> > last sysfs file:
> > /sys/devices/system/cpu/cpu3/cache/index2/shared_cpu_map
> > -- is this linked to a cpu up/down event ?
> >
> > Since this shows mostly with network card drivers, I think the most
> > plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> > calling it.
> >
> > Will dig further...
>
> I wonder how SLUB_FASTPATH is supposed to work, since it is affected by
> a classical ABA problem of lockless algo.
>
> cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed,
> while an interrupt came (on this cpu), and several allocations were done,
> and one free was performed at the end of this interruption, so 'object'
> was recycled.
>
> c->freelist can then contain the previous value (object), but
> object[c->offset] was changed by IRQ.
>
> We then put back in freelist an already allocated object.
>
I think you are right. A way to fix this would use the fact that the
freelist is only useful to point to the first free object in a page. We
could change it to an offset rather than an address.
The freelist would become a counter of type "long" which increments
until it wraps at 2^32 or 2^64. A PAGE_MASK bitmask could then be used
to get low order bits which would get the page offset of the first free
object, while the high order bits would insure we can detect this type
of object reuse when doing a cmpxchg. Upon free, the freelist counter
should always be incremented; this would be provided by adding PAGE_SIZE
to the counter and setting the LSBs to the correct offset.
On 32 bits architectures, it would allow 2^(32-12) = 1048576
allocations-free pairs to be done within interrupt handlers interrupting
a cmpxchg_local before the counter wraps. On 64 bits archs, it would
give 2^(64-12) = 2^52 allocation-free.
If we assume kmalloc/kfree pairs can take up to 1000 cycles to execute
(see
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=068fbad288a2c18b75b0425fb56d241f018a1cb5)
(3GHz Pentium 4) (therefore 333ns)
an interrupt handler doing 1048576 kmalloc/kfree would run for 0.35
seconds. An interrupt handler taking that much time would lead to other
OS problems (potential scheduler problems), so this quantity of
available allocations before a wrap-around looks safe. However, making
sure preemption is disabled would be safer here, since we cannot bound
the number of allocations that can be done by other processes if we are
scheduled out in the middle of the cmpxchg_local loop.
A revert is indeed the right solution at this stage until a corrected
version is ready.
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
* Pekka Enberg ([email protected]) wrote:
> Hi Mathieu,
>
> On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> > - stat(c, ALLOC_FASTPATH); seems to be using a var++, therefore
> > indicating it is not reentrant if IRQs are disabled. Since those are
> > only stats, I guess it's ok, but still weird.
>
> What is not re-entrant?
>
incrementing the variable with a "++" when interrupts are not disabled.
It's not an atomic add and it's racy. The code within stat() does
exactly this.
> On Feb 19, 2008 4:02 PM, Mathieu Desnoyers <[email protected]> wrote:
> > Since this shows mostly with network card drivers, I think the most
> > plausible cause would be an IRQ nesting over kmem_cache_alloc_node and
> > calling it.
>
> Yes, this can happen. Are you saying it is not safe to be in the
> lockless path when an IRQ triggers?
It should be safe, but I think Eric pointed the correct problem in his
reply.
Thanks,
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
On Tue, 2008-02-19 at 17:52 +0200, Pekka Enberg wrote:
> Ingo Molnar wrote:
> > * Pekka Enberg <[email protected]> wrote:
> >
> >>> Yes, this can happen. Are you saying it is not safe to be in the
> >>> lockless path when an IRQ triggers?
> >> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
> >> there to make sure we've retrieved c->freelist before c->page but then
> >> it uses a _compiler barrier_ which doesn't affect the CPU and the
> >> reads may still be re-ordered... Not sure if that matters here though.
> >
> > find a fix patch for that below - most systems affected seem to be SMP
> > ones.
> >
> > If this (or my other patch) indeed solves the problem i'd still favor a
> > full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it looks
> > quite un-cooked and quite un-tested for multiple independent reasons.
> >
> > Sigh, why do i again have to be the messenger who brings the bad news to
> > SLUB land, and again when poor Christoph went on vacation? :-/
> >
> > Ingo
> >
> > -------------------------->
> > Subject: SLUB: barrier fix
> > From: Ingo Molnar <[email protected]>
> >
> > ---
> > mm/slub.c | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > Index: linux/mm/slub.c
> > ===================================================================
> > --- linux.orig/mm/slub.c
> > +++ linux/mm/slub.c
> > @@ -1862,7 +1862,7 @@ static __always_inline void slab_free(st
> > debug_check_no_locks_freed(object, s->objsize);
> > do {
> > freelist = c->freelist;
> > - barrier();
> > + smp_mb();
> > /*
> > * If the compiler would reorder the retrieval of c->page to
> > * come before c->freelist then an interrupt could
>
> Torsten/Yamin, does this fix things for you? What about reverting commit
> 1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c ("SLUB: Alternate fast paths
> using cmpxchg_local")?
I'm busy in another issue and will test it ASAP. Sorry.
-yanmin
On Wed, 2008-02-20 at 08:36 +0800, Zhang, Yanmin wrote:
> On Tue, 2008-02-19 at 17:52 +0200, Pekka Enberg wrote:
> > Ingo Molnar wrote:
> > > * Pekka Enberg <[email protected]> wrote:
> > >
> > >>> Yes, this can happen. Are you saying it is not safe to be in the
> > >>> lockless path when an IRQ triggers?
> > >> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
> > >> there to make sure we've retrieved c->freelist before c->page but then
> > >> it uses a _compiler barrier_ which doesn't affect the CPU and the
> > >> reads may still be re-ordered... Not sure if that matters here though.
> > >
> > > find a fix patch for that below - most systems affected seem to be SMP
> > > ones.
> > >
> > > If this (or my other patch) indeed solves the problem i'd still favor a
> > > full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it looks
> > > quite un-cooked and quite un-tested for multiple independent reasons.
> > >
> > > Sigh, why do i again have to be the messenger who brings the bad news to
> > > SLUB land, and again when poor Christoph went on vacation? :-/
> > >
> > > Ingo
> > >
> > > -------------------------->
> > > Subject: SLUB: barrier fix
> > > From: Ingo Molnar <[email protected]>
> > >
> > > ---
> > > mm/slub.c | 2 +-
> > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > Index: linux/mm/slub.c
> > > ===================================================================
> > > --- linux.orig/mm/slub.c
> > > +++ linux/mm/slub.c
> > > @@ -1862,7 +1862,7 @@ static __always_inline void slab_free(st
> > > debug_check_no_locks_freed(object, s->objsize);
> > > do {
> > > freelist = c->freelist;
> > > - barrier();
> > > + smp_mb();
> > > /*
> > > * If the compiler would reorder the retrieval of c->page to
> > > * come before c->freelist then an interrupt could
> >
> > Torsten/Yamin, does this fix things for you? What about reverting commit
> > 1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c ("SLUB: Alternate fast paths
> > using cmpxchg_local")?
> I'm busy in another issue and will test it ASAP. Sorry.
I tested it on my 3 x86-64 machines. The small fix to use smp_mb to replace
barrier in slab_free doesn't work. Kernel still crashed at the same place.
I will test the reverting patch.
-yanmin
On Wed, 2008-02-20 at 10:08 +0800, Zhang, Yanmin wrote:
> On Wed, 2008-02-20 at 08:36 +0800, Zhang, Yanmin wrote:
> > On Tue, 2008-02-19 at 17:52 +0200, Pekka Enberg wrote:
> > > Ingo Molnar wrote:
> > > > * Pekka Enberg <[email protected]> wrote:
> > > >
> > > >>> Yes, this can happen. Are you saying it is not safe to be in the
> > > >>> lockless path when an IRQ triggers?
> > > >> Hmm. The barrier() in slab_free() looks fishy. The comment says it's
> > > >> there to make sure we've retrieved c->freelist before c->page but then
> > > >> it uses a _compiler barrier_ which doesn't affect the CPU and the
> > > >> reads may still be re-ordered... Not sure if that matters here though.
> > > >
> > > > find a fix patch for that below - most systems affected seem to be SMP
> > > > ones.
> > > >
> > > > If this (or my other patch) indeed solves the problem i'd still favor a
> > > > full revert of the SLUB_FASTPATH (commit 1f84260c8ce3b1ce26d4), it looks
> > > > quite un-cooked and quite un-tested for multiple independent reasons.
> > > >
> > > > Sigh, why do i again have to be the messenger who brings the bad news to
> > > > SLUB land, and again when poor Christoph went on vacation? :-/
> > > >
> > > > Ingo
> > > >
> > > > -------------------------->
> > > > Subject: SLUB: barrier fix
> > > > From: Ingo Molnar <[email protected]>
> > > >
> > > > ---
> > > > mm/slub.c | 2 +-
> > > > 1 file changed, 1 insertion(+), 1 deletion(-)
> > > >
> > > > Index: linux/mm/slub.c
> > > > ===================================================================
> > > > --- linux.orig/mm/slub.c
> > > > +++ linux/mm/slub.c
> > > > @@ -1862,7 +1862,7 @@ static __always_inline void slab_free(st
> > > > debug_check_no_locks_freed(object, s->objsize);
> > > > do {
> > > > freelist = c->freelist;
> > > > - barrier();
> > > > + smp_mb();
> > > > /*
> > > > * If the compiler would reorder the retrieval of c->page to
> > > > * come before c->freelist then an interrupt could
> > >
> > > Torsten/Yamin, does this fix things for you? What about reverting commit
> > > 1f84260c8ce3b1ce26d4c1d6dedc2f33a3a29c0c ("SLUB: Alternate fast paths
> > > using cmpxchg_local")?
> > I'm busy in another issue and will test it ASAP. Sorry.
> I tested it on my 3 x86-64 machines. The small fix to use smp_mb to replace
> barrier in slab_free doesn't work. Kernel still crashed at the same place.
>
> I will test the reverting patch.
Kernel with the reverting patch is ok.
I ran reboot/hackbench for more than 10 times on every one of my 3 x86-64 machines,
and kernel didn't crash.
-yanmin
On 2/20/2008, "Zhang, Yanmin" <[email protected]> wrote:
> Kernel with the reverting patch is ok.
> I ran reboot/hackbench for more than 10 times on every one of my 3 x86-64
> machines, and kernel didn't crash.
Great, Linus reverted the patch yesterday. Thanks for testing!
On Tue, 19 Feb 2008 09:36:34 +0100 Jens Axboe <[email protected]> wrote:
> But I think the radix 'scan over entire tree' is a bit fragile.
eek, it had better not be. Was this an error in the caller? Hope so.
> This
> patch adds a parallel hlist for ease of properly browsing the members,
Even though io_contexts are fairly uncommon, adding more stuff to a data
structure was a pretty sad alternative to fixing a bug in
radix_tree_gang_lookup(), or to fixing a bug in a caller of it.
IOW: what exactly went wrong here??
On Thu, Feb 21 2008, Andrew Morton wrote:
> On Tue, 19 Feb 2008 09:36:34 +0100 Jens Axboe <[email protected]> wrote:
>
> > But I think the radix 'scan over entire tree' is a bit fragile.
>
> eek, it had better not be. Was this an error in the caller? Hope so.
The cfq use of it, not the radix tree code! It juggled the keys and
wants to make sure that we see all users, modulo raced added ones (ok if
we see them, doesn't matter if we don't).
> > This
> > patch adds a parallel hlist for ease of properly browsing the members,
>
> Even though io_contexts are fairly uncommon, adding more stuff to a data
> structure was a pretty sad alternative to fixing a bug in
> radix_tree_gang_lookup(), or to fixing a bug in a caller of it.
>
> IOW: what exactly went wrong here??
I could not convince myself that the current code would always do the
right thing. We should not have been seeing ->key == NULL entries in
there, it implied a double exit of that process. So I decided to fix it
by making the code a lot more readable (the patch in question deleted a
lot more than it added), at the cost of that hlist head + node.
--
Jens Axboe
On Tue, 19 Feb 2008, Eric Dumazet wrote:
> I wonder how SLUB_FASTPATH is supposed to work, since it is affected by
> a classical ABA problem of lockless algo.
>
> cmpxchg_local(&c->freelist, object, object[c->offset]) can succeed,
> while an interrupt came (on this cpu), and several allocations were done,
> and one free was performed at the end of this interruption, so 'object'
> was recycled.
> c->freelist can then contain the previous value (object), but
> object[c->offset] was changed by IRQ.
>
> We then put back in freelist an already allocated object.
Right. The alloc fastpath assumes that the object is not modified while it
is allocated...
Du! This shoots my nice scheme in the foot and there does not seem to be
an easy way to fix it. This means we also need to revert the
page->end patch. Useless if we do not have the cmpxchg_local.
On Tue, 19 Feb 2008, Mathieu Desnoyers wrote:
> incrementing the variable with a "++" when interrupts are not disabled.
> It's not an atomic add and it's racy. The code within stat() does
> exactly this.
Yes but that is only for used for statistics which can be racy. Note that
the VM event statistics also can be racy.
On Tue, 19 Feb 2008, Mathieu Desnoyers wrote:
> I think you are right. A way to fix this would use the fact that the
> freelist is only useful to point to the first free object in a page. We
> could change it to an offset rather than an address.
>
> The freelist would become a counter of type "long" which increments
> until it wraps at 2^32 or 2^64. A PAGE_MASK bitmask could then be used
> to get low order bits which would get the page offset of the first free
> object, while the high order bits would insure we can detect this type
> of object reuse when doing a cmpxchg. Upon free, the freelist counter
> should always be incremented; this would be provided by adding PAGE_SIZE
> to the counter and setting the LSBs to the correct offset.
Urgh.... That sounds way too complicated. Do you have an experimental
patch that would allow us to see the impact?
On Wed, 27 Feb 2008 15:32:52 -0800 (PST) Christoph Lameter <[email protected]> wrote:
> On Tue, 19 Feb 2008, Mathieu Desnoyers wrote:
>
> > incrementing the variable with a "++" when interrupts are not disabled.
> > It's not an atomic add and it's racy. The code within stat() does
> > exactly this.
>
> Yes but that is only for used for statistics which can be racy. Note that
> the VM event statistics also can be racy.
>
Doing ++ on a u32 _is_ atomic wrt interrupts on x86 and probably lots of
other architectures, so we're OK using unsigned there. But on some other
architectures ++ on u32 is not atomic wrt interrutps, so they should use
atomic_t or some other arch-specific mechanism.
And guess what? It's already all been done: local_t.
On Wed, 27 Feb 2008, Andrew Morton wrote:
> Doing ++ on a u32 _is_ atomic wrt interrupts on x86 and probably lots of
> other architectures, so we're OK using unsigned there. But on some other
> architectures ++ on u32 is not atomic wrt interrutps, so they should use
> atomic_t or some other arch-specific mechanism.
>
> And guess what? It's already all been done: local_t.
local_t requires the disabling of preempt to work right.
The real solution here is cpu_alloc / cpu_ops. Per cpu operations work on
an offset relative to the start of the per process cpu data area in some
register. An increment can then be atomic vs. interrupt because it does
the calculation of the address and the inc in one instruction. F.e.
gs: inc [percpu_offset]
Processor may change before and after without ill effects. So no preempt
since the instruction will always reference the %%gs register that points
to the percpu area of the currently executing processor.
* Christoph Lameter ([email protected]) wrote:
> On Tue, 19 Feb 2008, Mathieu Desnoyers wrote:
>
> > I think you are right. A way to fix this would use the fact that the
> > freelist is only useful to point to the first free object in a page. We
> > could change it to an offset rather than an address.
> >
> > The freelist would become a counter of type "long" which increments
> > until it wraps at 2^32 or 2^64. A PAGE_MASK bitmask could then be used
> > to get low order bits which would get the page offset of the first free
> > object, while the high order bits would insure we can detect this type
> > of object reuse when doing a cmpxchg. Upon free, the freelist counter
> > should always be incremented; this would be provided by adding PAGE_SIZE
> > to the counter and setting the LSBs to the correct offset.
>
> Urgh.... That sounds way too complicated. Do you have an experimental
> patch that would allow us to see the impact?
>
Yep, I have an experimental patch ready. It would need some thorough
testing though. I seems to run fine on an x86_32 with and without
preemption (therefore with and without the slub cmpxchg_local fastpath).
You should first revert commit 00e962c5408b9f2d0bebd2308673fe982cb9a5fe
(this is the slub fastpath revert itself, currently in 2.6.25-rc3)
And then apply :
Implement slub fastpath in terms of freebase and freeoffset
It allows the cmpxchg_local to detect object re-use by keeping a counter in the
freeoffset MSBs.
freeoffset & PAGE_MASK is the offset of the freelist element within the page.
freeoffset & ~PAGE_MASK is the counter to detect object re-use.
freebase is the address of the page in this the object is located. It is a
multiple of PAGE_SIZE.
Whenever an object is freed in the cpu slab cache, the counter is incremented.
Whenever the alloc/free slow paths are modifying the freeoffset or freebase, the
freeoffset counter is also incremented. It is used to make sure we know if
freebase has been modified in an interrupt nested over the fast path.
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Christoph Lameter <[email protected]>
---
include/linux/slub_def.h | 35 +++++++++++++++++++
mm/slub.c | 84 +++++++++++++++++++++++++++++++++--------------
2 files changed, 93 insertions(+), 26 deletions(-)
Index: linux-2.6-lttng/include/linux/slub_def.h
===================================================================
--- linux-2.6-lttng.orig/include/linux/slub_def.h 2008-02-27 20:40:48.000000000 -0500
+++ linux-2.6-lttng/include/linux/slub_def.h 2008-02-28 00:17:28.000000000 -0500
@@ -32,7 +32,18 @@ enum stat_item {
NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu {
- void **freelist; /* Pointer to first free per cpu object */
+ unsigned long freeoffset; /*
+ * Offset of the first free per cpu
+ * object. The MSBs are used as a
+ * counter which must be incremented
+ * each time an object is freed and each
+ * time freebase is changed.
+ */
+ unsigned long freebase; /*
+ * Pointer to the page address
+ * containing the first free per cpu
+ * object.
+ */
struct page *page; /* The slab from which we are allocating */
int node; /* The node of the page (or -1 for debug) */
unsigned int offset; /* Freepointer offset (in word units) */
@@ -42,6 +53,28 @@ struct kmem_cache_cpu {
#endif
};
+/*
+ * Used when interrupts are disabled, so no memory barriers are needed.
+ */
+static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
+{
+ return (void **)(c->freebase | (c->freeoffset & PAGE_MASK));
+}
+
+/*
+ * Updates the freebase and freeoffset concurrently with slub fastpath.
+ * We can nest over the fastpath as an interrupt. Therefore, all the freebase
+ * and freeoffset modifications will appear to have happened atomically from the
+ * fastpath point of view. (those are per-cpu variables)
+ */
+static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
+{
+ c->freebase = (unsigned long)freelist & ~PAGE_MASK;
+ c->freeoffset += PAGE_SIZE;
+ c->freeoffset &= ~PAGE_MASK;
+ c->freeoffset |= (unsigned long)freelist & PAGE_MASK;
+}
+
struct kmem_cache_node {
spinlock_t list_lock; /* Protect partial list and nr_partial */
unsigned long nr_partial;
Index: linux-2.6-lttng/mm/slub.c
===================================================================
--- linux-2.6-lttng.orig/mm/slub.c 2008-02-27 20:41:14.000000000 -0500
+++ linux-2.6-lttng/mm/slub.c 2008-02-28 00:20:06.000000000 -0500
@@ -305,7 +305,7 @@ static inline struct kmem_cache_cpu *get
* Note that SLUB relies on page_mapping returning NULL for pages with bit 0
* in the mapping set.
*/
-static inline int is_end(void *addr)
+static inline int is_end(long addr)
{
return (unsigned long)addr & PAGE_MAPPING_ANON;
}
@@ -1411,7 +1411,7 @@ static void deactivate_slab(struct kmem_
struct page *page = c->page;
int tail = 1;
- if (c->freelist)
+ if (get_freelist_ptr(c))
stat(c, DEACTIVATE_REMOTE_FREES);
/*
* Merge cpu freelist into freelist. Typically we get here
@@ -1422,14 +1422,14 @@ static void deactivate_slab(struct kmem_
* be called for a debug slab. Then c->freelist may contain
* a dummy pointer.
*/
- while (unlikely(!is_end(c->freelist))) {
+ while (unlikely(!is_end(c->freeoffset))) {
void **object;
tail = 0; /* Hot objects. Put the slab first */
/* Retrieve object from cpu_freelist */
- object = c->freelist;
- c->freelist = c->freelist[c->offset];
+ object = get_freelist_ptr(c);
+ set_freelist_ptr(c, object[c->offset]);
/* And put onto the regular freelist */
object[c->offset] = page->freelist;
@@ -1534,7 +1534,7 @@ load_freelist:
goto debug;
object = c->page->freelist;
- c->freelist = object[c->offset];
+ set_freelist_ptr(c, object[c->offset]);
c->page->inuse = s->objects;
c->page->freelist = c->page->end;
c->node = page_to_nid(c->page);
@@ -1636,28 +1636,45 @@ static __always_inline void *slab_alloc(
*/
#ifdef SLUB_FASTPATH
+ unsigned long freeoffset, freebase;
+
c = get_cpu_slab(s, raw_smp_processor_id());
do {
- object = c->freelist;
- if (unlikely(is_end(object) || !node_match(c, node))) {
+ freeoffset = c->freeoffset;
+ /*
+ * If freebase is changed, freeoffset _must_ have its
+ * counter incremented.
+ * read freeoffset before freebase (wrt interrupts).
+ */
+ barrier();
+ freebase = c->freebase;
+ if (unlikely(is_end(freeoffset) || !node_match(c, node))) {
object = __slab_alloc(s, gfpflags, node, addr, c);
break;
}
+ object = (void **)(freebase | (freeoffset & PAGE_MASK));
stat(c, ALLOC_FASTPATH);
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
+ /* No need to increment the MSB counter here, because only
+ * object free will lead to counter re-use. */
+ } while (cmpxchg_local(&c->freeoffset, freeoffset,
+ (freeoffset + (c->offset * sizeof(void *)))) != freeoffset);
#else
unsigned long flags;
local_irq_save(flags);
c = get_cpu_slab(s, smp_processor_id());
- if (unlikely(is_end(c->freelist) || !node_match(c, node)))
+ if (unlikely(is_end(c->freeoffset) || !node_match(c, node)))
object = __slab_alloc(s, gfpflags, node, addr, c);
else {
- object = c->freelist;
- c->freelist = object[c->offset];
+ object = get_freelist_ptr(c);
+ /*
+ * No need to change freebase or increment freeoffset of
+ * PAGE_SIZE, so we simply update the freeoffset LSB here.
+ */
+ c->freeoffset &= ~PAGE_MASK;
+ c->freeoffset |= (unsigned long)object[c->offset] & PAGE_MASK;
stat(c, ALLOC_FASTPATH);
}
local_irq_restore(flags);
@@ -1779,17 +1796,24 @@ static __always_inline void slab_free(st
struct kmem_cache_cpu *c;
#ifdef SLUB_FASTPATH
- void **freelist;
+ unsigned long freeoffset, freebase, newoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
debug_check_no_locks_freed(object, s->objsize);
do {
- freelist = c->freelist;
+ freeoffset = c->freeoffset;
+ /*
+ * If freebase is changed, freeoffset _must_ have its
+ * counter incremented.
+ * read freeoffset before freebase (wrt interrupts).
+ */
+ barrier();
+ freebase = c->freebase;
barrier();
/*
* If the compiler would reorder the retrieval of c->page to
- * come before c->freelist then an interrupt could
- * change the cpu slab before we retrieve c->freelist. We
+ * come before c->freeoffset and freebase then an interrupt
+ * could change the cpu slab before we retrieve c->freelist. We
* could be matching on a page no longer active and put the
* object onto the freelist of the wrong slab.
*
@@ -1801,9 +1825,14 @@ static __always_inline void slab_free(st
__slab_free(s, page, x, addr, c->offset);
break;
}
- object[c->offset] = freelist;
+ object[c->offset] = (void **)(freebase |
+ (freeoffset & PAGE_MASK));
stat(c, FREE_FASTPATH);
- } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
+ newoffset = freeoffset + PAGE_SIZE;
+ newoffset &= ~PAGE_MASK;
+ newoffset |= (unsigned long)object & PAGE_MASK;
+ } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
+ != freeoffset);
#else
unsigned long flags;
@@ -1811,8 +1840,13 @@ static __always_inline void slab_free(st
debug_check_no_locks_freed(object, s->objsize);
c = get_cpu_slab(s, smp_processor_id());
if (likely(page == c->page && c->node >= 0)) {
- object[c->offset] = c->freelist;
- c->freelist = object;
+ object[c->offset] = get_freelist_ptr(c);
+ /*
+ * No need to update freebase here, so simply update freeoffset.
+ */
+ c->freeoffset += PAGE_SIZE;
+ c->freeoffset &= ~PAGE_MASK;
+ c->freeoffset |= (unsigned long)object & PAGE_MASK;
stat(c, FREE_FASTPATH);
} else
__slab_free(s, page, x, addr, c->offset);
@@ -1995,7 +2029,8 @@ static void init_kmem_cache_cpu(struct k
struct kmem_cache_cpu *c)
{
c->page = NULL;
- c->freelist = (void *)PAGE_MAPPING_ANON;
+ c->freeoffset = PAGE_MAPPING_ANON;
+ c->freebase = 0;
c->node = 0;
c->offset = s->offset / sizeof(void *);
c->objsize = s->objsize;
@@ -2042,8 +2077,7 @@ static struct kmem_cache_cpu *alloc_kmem
struct kmem_cache_cpu *c = per_cpu(kmem_cache_cpu_free, cpu);
if (c)
- per_cpu(kmem_cache_cpu_free, cpu) =
- (void *)c->freelist;
+ per_cpu(kmem_cache_cpu_free, cpu) = (void *)get_freelist_ptr(c);
else {
/* Table overflow: So allocate ourselves */
c = kmalloc_node(
@@ -2064,7 +2098,7 @@ static void free_kmem_cache_cpu(struct k
kfree(c);
return;
}
- c->freelist = (void *)per_cpu(kmem_cache_cpu_free, cpu);
+ set_freelist_ptr(c, (void *)per_cpu(kmem_cache_cpu_free, cpu));
per_cpu(kmem_cache_cpu_free, cpu) = c;
}
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
* Andrew Morton <[email protected]> wrote:
> > > incrementing the variable with a "++" when interrupts are not
> > > disabled. It's not an atomic add and it's racy. The code within
> > > stat() does exactly this.
> >
> > Yes but that is only for used for statistics which can be racy. Note
> > that the VM event statistics also can be racy.
>
> Doing ++ on a u32 _is_ atomic wrt interrupts on x86 and probably lots
> of other architectures, so we're OK using unsigned there. [...]
hm, why should it be atomic wrt. irqs? There's nothing that keeps gcc
from not doing an "incl memory_address" but do something like: "load
memory address into regx, incl regx, ... store address into memory
address" - and that's not atomic at that point.
Ingo
On Wed, 27 Feb 2008, Andrew Morton wrote:
> Doing ++ on a u32 _is_ atomic wrt interrupts on x86 and probably lots of
> other architectures, so we're OK using unsigned there.
So you make implicit assumptions about how gcc compiles your ++? I am
afraid you can't do that, gcc is absolutely free to turn variable++;
statement to non-atomic sequence of instructions (memory->register load,
increment register, for example).
--
Jiri Kosina
SUSE Labs
> hm, why should it be atomic wrt. irqs? There's nothing that keeps gcc
It isn't - we've got tty layer traces of serial counts going wrong that
rely on precisely that assumption.
Alan
On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> Yep, I have an experimental patch ready. It would need some thorough
> testing though. I seems to run fine on an x86_32 with and without
> preemption (therefore with and without the slub cmpxchg_local fastpath).
What is the performance impact?
More comments follow...
> freeoffset & PAGE_MASK is the offset of the freelist element within the page.
> freeoffset & ~PAGE_MASK is the counter to detect object re-use.
> freebase is the address of the page in this the object is located. It is a
> multiple of PAGE_SIZE.
How does the page mask work for order 1 and other higher order allocations?
> Whenever an object is freed in the cpu slab cache, the counter is incremented.
> Whenever the alloc/free slow paths are modifying the freeoffset or freebase, the
> freeoffset counter is also incremented. It is used to make sure we know if
> freebase has been modified in an interrupt nested over the fast path.
> + unsigned long freebase; /*
> + * Pointer to the page address
> + * containing the first free per cpu
> + * object.
> + */
This is page_address(c->page)?
> struct page *page; /* The slab from which we are allocating */
> int node; /* The node of the page (or -1 for debug) */
> unsigned int offset; /* Freepointer offset (in word units) */
> +/*
> + * Used when interrupts are disabled, so no memory barriers are needed.
> + */
> +static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
> +{
> + return (void **)(c->freebase | (c->freeoffset & PAGE_MASK));
> +}
page_address(c->page) + (c->freeoffset & (PAGE_MASK << s->order)) ?
store the page mask also in the kmem_cache_cpu structure?
> +/*
> + * Updates the freebase and freeoffset concurrently with slub fastpath.
> + * We can nest over the fastpath as an interrupt. Therefore, all the freebase
> + * and freeoffset modifications will appear to have happened atomically from the
> + * fastpath point of view. (those are per-cpu variables)
> + */
> +static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
> +{
> + c->freebase = (unsigned long)freelist & ~PAGE_MASK;
> + c->freeoffset += PAGE_SIZE;
> + c->freeoffset &= ~PAGE_MASK;
> + c->freeoffset |= (unsigned long)freelist & PAGE_MASK;
> +}
How is this going to show up as an atomic update? You modify multiple per
cpu fields and an interrupt could happen in between.
> @@ -1411,7 +1411,7 @@ static void deactivate_slab(struct kmem_
> struct page *page = c->page;
> int tail = 1;
>
> - if (c->freelist)
> + if (get_freelist_ptr(c))
> stat(c, DEACTIVATE_REMOTE_FREES);
> /*
The original code is wrong. It should be
if (is_end(c->freelist))
stat(c, DEACTIVATE_REMOTE_FREES)
> - c->freelist = c->freelist[c->offset];
> + object = get_freelist_ptr(c);
> + set_freelist_ptr(c, object[c->offset]);
That use of set_freelist is safe since interrupts are disabled. So the
function can only be used i interrupts are disabled?
> + /* No need to increment the MSB counter here, because only
> + * object free will lead to counter re-use. */
> + } while (cmpxchg_local(&c->freeoffset, freeoffset,
> + (freeoffset + (c->offset * sizeof(void *)))) != freeoffset);
How does this work? You replace the freeoffset with the the once
incremented by the object offset??? The objects may not be in sequence on
the freelist and the increment wont get you to the next object anyways
since c->offset is usually 0.
* Christoph Lameter ([email protected]) wrote:
> On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
>
> > Yep, I have an experimental patch ready. It would need some thorough
> > testing though. I seems to run fine on an x86_32 with and without
> > preemption (therefore with and without the slub cmpxchg_local fastpath).
>
> What is the performance impact?
>
Will do after doing changes according to your comments.
> More comments follow...
>
>
> > freeoffset & PAGE_MASK is the offset of the freelist element within the page.
> > freeoffset & ~PAGE_MASK is the counter to detect object re-use.
> > freebase is the address of the page in this the object is located. It is a
> > multiple of PAGE_SIZE.
>
> How does the page mask work for order 1 and other higher order allocations?
>
It doesn't ? :) will fix.
> > Whenever an object is freed in the cpu slab cache, the counter is incremented.
> > Whenever the alloc/free slow paths are modifying the freeoffset or freebase, the
> > freeoffset counter is also incremented. It is used to make sure we know if
> > freebase has been modified in an interrupt nested over the fast path.
>
> > + unsigned long freebase; /*
> > + * Pointer to the page address
> > + * containing the first free per cpu
> > + * object.
> > + */
>
> This is page_address(c->page)?
Yes, will change.
>
> > struct page *page; /* The slab from which we are allocating */
> > int node; /* The node of the page (or -1 for debug) */
> > unsigned int offset; /* Freepointer offset (in word units) */
>
> > +/*
> > + * Used when interrupts are disabled, so no memory barriers are needed.
> > + */
> > +static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
> > +{
> > + return (void **)(c->freebase | (c->freeoffset & PAGE_MASK));
> > +}
>
> page_address(c->page) + (c->freeoffset & (PAGE_MASK << s->order)) ?
>
I guess it would be more :
page_address(c->page) | (c->freeoffset & c->off_mask)
where c->off_mask = (PAGE_SIZE << s->order) - 1;
So we don't throw away the LSBs.
> store the page mask also in the kmem_cache_cpu structure?
>
Yep, that would be faster.
> > +/*
> > + * Updates the freebase and freeoffset concurrently with slub fastpath.
> > + * We can nest over the fastpath as an interrupt. Therefore, all the freebase
> > + * and freeoffset modifications will appear to have happened atomically from the
> > + * fastpath point of view. (those are per-cpu variables)
> > + */
> > +static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
> > +{
> > + c->freebase = (unsigned long)freelist & ~PAGE_MASK;
> > + c->freeoffset += PAGE_SIZE;
> > + c->freeoffset &= ~PAGE_MASK;
> > + c->freeoffset |= (unsigned long)freelist & PAGE_MASK;
> > +}
>
> How is this going to show up as an atomic update? You modify multiple per
> cpu fields and an interrupt could happen in between.
>
Note the "from the fastpath point of view", which means that if an
interrupt nests over the cmpxchg_local fastpath and uses
set_freelist_ptr, all the operations will be executed before the
interrupt returns to the cmpxchg_local fastpath, therefore showing the
update as being done "atomically" from the cmpxchg_local fastpath point
of view.
Anyway, I am changing this for :
static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
{
unsigned long offset;
offset = c->freeoffset + c->off_mask + 1;
offset &= ~c->off_mask;
offset |= (unsigned long)freelist & c->off_mask;
c->freeoffset = offset;
}
Which will insure c->freeoffset is always in a valid state, therefore
allowing interrupts to nest over it.
> > @@ -1411,7 +1411,7 @@ static void deactivate_slab(struct kmem_
> > struct page *page = c->page;
> > int tail = 1;
> >
> > - if (c->freelist)
> > + if (get_freelist_ptr(c))
> > stat(c, DEACTIVATE_REMOTE_FREES);
> > /*
>
> The original code is wrong. It should be
>
> if (is_end(c->freelist))
> stat(c, DEACTIVATE_REMOTE_FREES)
>
>
> > - c->freelist = c->freelist[c->offset];
> > + object = get_freelist_ptr(c);
> > + set_freelist_ptr(c, object[c->offset]);
>
> That use of set_freelist is safe since interrupts are disabled. So the
> function can only be used i interrupts are disabled?
>
Should be ok now since we allow interrupts to nest over
set_freelist_ptr. But I think this is also protected by slab_lock, taken
both in the slow path and in deactivate_slab.
In any case, doing a
object = get_freelist_ptr(c);
set_freelist_ptr(c, object[c->offset]);
Like deactivate_slab does should be either protected by disabling
interrupts or by the slab_lock. Am I right ?
> > + /* No need to increment the MSB counter here, because only
> > + * object free will lead to counter re-use. */
> > + } while (cmpxchg_local(&c->freeoffset, freeoffset,
> > + (freeoffset + (c->offset * sizeof(void *)))) != freeoffset);
>
> How does this work? You replace the freeoffset with the the once
> incremented by the object offset??? The objects may not be in sequence on
> the freelist and the increment wont get you to the next object anyways
> since c->offset is usually 0.
>
Hrm, there should be a 1 to 1 mapping between the old code and the new
code :
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
+ /* No need to increment the MSB counter here, because only
+ * object free will lead to counter re-use. */
+ } while (cmpxchg_local(&c->freeoffset, freeoffset,
+ (freeoffset + (c->offset * sizeof(void *)))) != freeoffset);
With the difference that we use only offsets instead of the full object
address.
Ah! I think I found the issue. It should become :
newoffset = freeoffset;
newoffset &= ~c->off_mask;
newoffset |= (unsigned long)(object[c->offset]) & c->off_mask;
} while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
!= freeoffset);
Mathieu
new code, compile-tested only :
Implement slub fastpath in terms of freebase and freeoffset
It allows the cmpxchg_local to detect object re-use by keeping a counter in the
freeoffset MSBs.
freeoffset & c->off_mask is the offset of the freelist element within the page
freeoffset & ~c->off_mask is the counter to detect object re-use..
freebase is the address of the page in this the object is located. It is a
multiple of c->off_mask + 1.
Whenever an object is freed in the cpu slab cache, the counter is incremented.
Whenever the alloc/free slow paths are modifying the freeoffset or freebase, the
freeoffset counter is also incremented. It is used to make sure we know if
freebase has been modified in an interrupt nested over the fast path.
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Christoph Lameter <[email protected]>
---
include/linux/slub_def.h | 9 +++-
mm/slub.c | 103 ++++++++++++++++++++++++++++++++++-------------
2 files changed, 83 insertions(+), 29 deletions(-)
Index: linux-2.6-lttng/include/linux/slub_def.h
===================================================================
--- linux-2.6-lttng.orig/include/linux/slub_def.h 2008-02-27 20:40:48.000000000 -0500
+++ linux-2.6-lttng/include/linux/slub_def.h 2008-02-28 18:19:42.000000000 -0500
@@ -32,7 +32,14 @@ enum stat_item {
NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu {
- void **freelist; /* Pointer to first free per cpu object */
+ unsigned long freeoffset; /*
+ * Offset of the first free per cpu
+ * object. The MSBs are used as a
+ * counter which must be incremented
+ * each time an object is freed and each
+ * time freebase is changed.
+ */
+ unsigned long off_mask; /* freeoffset offset LSB mask */
struct page *page; /* The slab from which we are allocating */
int node; /* The node of the page (or -1 for debug) */
unsigned int offset; /* Freepointer offset (in word units) */
Index: linux-2.6-lttng/mm/slub.c
===================================================================
--- linux-2.6-lttng.orig/mm/slub.c 2008-02-27 20:41:14.000000000 -0500
+++ linux-2.6-lttng/mm/slub.c 2008-02-28 18:22:14.000000000 -0500
@@ -138,6 +138,22 @@ static inline void ClearSlabDebug(struct
page->flags &= ~SLABDEBUG;
}
+static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
+{
+ return (void **)((unsigned long)page_address(c->page)
+ | (c->freeoffset & c->off_mask));
+}
+
+static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
+{
+ unsigned long offset;
+
+ offset = c->freeoffset + c->off_mask + 1;
+ offset &= ~c->off_mask;
+ offset |= (unsigned long)freelist & c->off_mask;
+ c->freeoffset = offset;
+}
+
/*
* Issues still to be resolved:
*
@@ -305,7 +321,7 @@ static inline struct kmem_cache_cpu *get
* Note that SLUB relies on page_mapping returning NULL for pages with bit 0
* in the mapping set.
*/
-static inline int is_end(void *addr)
+static inline int is_end(long addr)
{
return (unsigned long)addr & PAGE_MAPPING_ANON;
}
@@ -1411,7 +1427,7 @@ static void deactivate_slab(struct kmem_
struct page *page = c->page;
int tail = 1;
- if (c->freelist)
+ if (is_end(c->freeoffset))
stat(c, DEACTIVATE_REMOTE_FREES);
/*
* Merge cpu freelist into freelist. Typically we get here
@@ -1422,14 +1438,14 @@ static void deactivate_slab(struct kmem_
* be called for a debug slab. Then c->freelist may contain
* a dummy pointer.
*/
- while (unlikely(!is_end(c->freelist))) {
+ while (unlikely(!is_end(c->freeoffset))) {
void **object;
tail = 0; /* Hot objects. Put the slab first */
/* Retrieve object from cpu_freelist */
- object = c->freelist;
- c->freelist = c->freelist[c->offset];
+ object = get_freelist_ptr(c);
+ set_freelist_ptr(c, object[c->offset]);
/* And put onto the regular freelist */
object[c->offset] = page->freelist;
@@ -1534,7 +1550,7 @@ load_freelist:
goto debug;
object = c->page->freelist;
- c->freelist = object[c->offset];
+ set_freelist_ptr(c, object[c->offset]);
c->page->inuse = s->objects;
c->page->freelist = c->page->end;
c->node = page_to_nid(c->page);
@@ -1636,28 +1652,48 @@ static __always_inline void *slab_alloc(
*/
#ifdef SLUB_FASTPATH
+ unsigned long freeoffset, newoffset;
+
c = get_cpu_slab(s, raw_smp_processor_id());
do {
- object = c->freelist;
- if (unlikely(is_end(object) || !node_match(c, node))) {
+ freeoffset = c->freeoffset;
+ /*
+ * If c->page is changed, freeoffset _must_ have its
+ * counter incremented.
+ * read freeoffset before c->page (wrt interrupts).
+ */
+ barrier();
+ if (unlikely(is_end(freeoffset) || !node_match(c, node))) {
object = __slab_alloc(s, gfpflags, node, addr, c);
break;
}
+ object = (void **)((unsigned long)page_address(c->page)
+ | (freeoffset & c->off_mask));
stat(c, ALLOC_FASTPATH);
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
+ /* No need to increment the MSB counter here, because only
+ * object free will lead to counter re-use. */
+ newoffset = freeoffset;
+ newoffset &= ~c->off_mask;
+ newoffset |= (unsigned long)(object[c->offset]) & c->off_mask;
+ } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
+ != freeoffset);
#else
unsigned long flags;
local_irq_save(flags);
c = get_cpu_slab(s, smp_processor_id());
- if (unlikely(is_end(c->freelist) || !node_match(c, node)))
+ if (unlikely(is_end(c->freeoffset) || !node_match(c, node)))
object = __slab_alloc(s, gfpflags, node, addr, c);
else {
- object = c->freelist;
- c->freelist = object[c->offset];
+ object = get_freelist_ptr(c);
+ /*
+ * No need to increment freeoffset of PAGE_SIZE, so we simply
+ * update the freeoffset LSB here.
+ */
+ c->freeoffset &= ~c->off_mask;
+ c->freeoffset |= (unsigned long)object[c->offset] & c->off_mask;
stat(c, ALLOC_FASTPATH);
}
local_irq_restore(flags);
@@ -1779,21 +1815,21 @@ static __always_inline void slab_free(st
struct kmem_cache_cpu *c;
#ifdef SLUB_FASTPATH
- void **freelist;
+ unsigned long freeoffset, newoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
debug_check_no_locks_freed(object, s->objsize);
do {
- freelist = c->freelist;
+ freeoffset = c->freeoffset;
barrier();
/*
* If the compiler would reorder the retrieval of c->page to
- * come before c->freelist then an interrupt could
- * change the cpu slab before we retrieve c->freelist. We
- * could be matching on a page no longer active and put the
- * object onto the freelist of the wrong slab.
+ * come before c->freeoffset then an interrupt could change the
+ * cpu slab before we retrieve c->freelist. We could be matching
+ * on a page no longer active and put the object onto the
+ * freelist of the wrong slab.
*
- * On the other hand: If we already have the freelist pointer
+ * On the other hand: If we already have the freeoffset
* then any change of cpu_slab will cause the cmpxchg to fail
* since the freelist pointers are unique per slab.
*/
@@ -1801,9 +1837,15 @@ static __always_inline void slab_free(st
__slab_free(s, page, x, addr, c->offset);
break;
}
- object[c->offset] = freelist;
+ object[c->offset] =
+ (void **)((unsigned long)page_address(c->page) |
+ (freeoffset & c->off_mask));
stat(c, FREE_FASTPATH);
- } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
+ newoffset = freeoffset + PAGE_SIZE;
+ newoffset &= ~c->off_mask;
+ newoffset |= (unsigned long)object & c->off_mask;
+ } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
+ != freeoffset);
#else
unsigned long flags;
@@ -1811,8 +1853,13 @@ static __always_inline void slab_free(st
debug_check_no_locks_freed(object, s->objsize);
c = get_cpu_slab(s, smp_processor_id());
if (likely(page == c->page && c->node >= 0)) {
- object[c->offset] = c->freelist;
- c->freelist = object;
+ object[c->offset] = get_freelist_ptr(c);
+ /*
+ * No need to update c->page here, so simply update freeoffset.
+ */
+ c->freeoffset += c->off_mask + 1;
+ c->freeoffset &= ~c->off_mask;
+ c->freeoffset |= (unsigned long)object & c->off_mask;
stat(c, FREE_FASTPATH);
} else
__slab_free(s, page, x, addr, c->offset);
@@ -1995,7 +2042,8 @@ static void init_kmem_cache_cpu(struct k
struct kmem_cache_cpu *c)
{
c->page = NULL;
- c->freelist = (void *)PAGE_MAPPING_ANON;
+ c->freeoffset = PAGE_MAPPING_ANON;
+ c->off_mask = (PAGE_SIZE << s->order) - 1;
c->node = 0;
c->offset = s->offset / sizeof(void *);
c->objsize = s->objsize;
@@ -2042,8 +2090,7 @@ static struct kmem_cache_cpu *alloc_kmem
struct kmem_cache_cpu *c = per_cpu(kmem_cache_cpu_free, cpu);
if (c)
- per_cpu(kmem_cache_cpu_free, cpu) =
- (void *)c->freelist;
+ per_cpu(kmem_cache_cpu_free, cpu) = (void *)get_freelist_ptr(c);
else {
/* Table overflow: So allocate ourselves */
c = kmalloc_node(
@@ -2064,7 +2111,7 @@ static void free_kmem_cache_cpu(struct k
kfree(c);
return;
}
- c->freelist = (void *)per_cpu(kmem_cache_cpu_free, cpu);
+ set_freelist_ptr(c, (void *)per_cpu(kmem_cache_cpu_free, cpu));
per_cpu(kmem_cache_cpu_free, cpu) = c;
}
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
> {
> unsigned long offset;
>
> offset = c->freeoffset + c->off_mask + 1;
> offset &= ~c->off_mask;
> offset |= (unsigned long)freelist & c->off_mask;
> c->freeoffset = offset;
> }
>
> Which will insure c->freeoffset is always in a valid state, therefore
> allowing interrupts to nest over it.
Ok.
> Should be ok now since we allow interrupts to nest over
> set_freelist_ptr. But I think this is also protected by slab_lock, taken
> both in the slow path and in deactivate_slab.
The slab locks can only be taken with interrupts disabled.
> In any case, doing a
>
> object = get_freelist_ptr(c);
> set_freelist_ptr(c, object[c->offset]);
>
> Like deactivate_slab does should be either protected by disabling
> interrupts or by the slab_lock. Am I right ?
Correct.
> Ah! I think I found the issue. It should become :
>
>
> newoffset = freeoffset;
> newoffset &= ~c->off_mask;
> newoffset |= (unsigned long)(object[c->offset]) & c->off_mask;
> } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
> != freeoffset);
Looks okay.
> Index: linux-2.6-lttng/mm/slub.c
> ===================================================================
> --- linux-2.6-lttng.orig/mm/slub.c 2008-02-27 20:41:14.000000000 -0500
> +++ linux-2.6-lttng/mm/slub.c 2008-02-28 18:22:14.000000000 -0500
> @@ -138,6 +138,22 @@ static inline void ClearSlabDebug(struct
> page->flags &= ~SLABDEBUG;
> }
>
> +static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
> +{
> + return (void **)((unsigned long)page_address(c->page)
> + | (c->freeoffset & c->off_mask));
> +}
Hmmmm... page_address() is an expensive operation.
> @@ -1636,28 +1652,48 @@ static __always_inline void *slab_alloc(
> */
>
> #ifdef SLUB_FASTPATH
> + unsigned long freeoffset, newoffset;
> +
> c = get_cpu_slab(s, raw_smp_processor_id());
> do {
> - object = c->freelist;
> - if (unlikely(is_end(object) || !node_match(c, node))) {
> + freeoffset = c->freeoffset;
> + /*
> + * If c->page is changed, freeoffset _must_ have its
> + * counter incremented.
> + * read freeoffset before c->page (wrt interrupts).
> + */
> + barrier();
> + if (unlikely(is_end(freeoffset) || !node_match(c, node))) {
> object = __slab_alloc(s, gfpflags, node, addr, c);
> break;
> }
> + object = (void **)((unsigned long)page_address(c->page)
Expensive op page_address().
> @@ -1779,21 +1815,21 @@ static __always_inline void slab_free(st
> struct kmem_cache_cpu *c;
>
> #ifdef SLUB_FASTPATH
> - void **freelist;
> + unsigned long freeoffset, newoffset;
>
> c = get_cpu_slab(s, raw_smp_processor_id());
> debug_check_no_locks_freed(object, s->objsize);
> do {
> - freelist = c->freelist;
> + freeoffset = c->freeoffset;
> barrier();
> /*
> * If the compiler would reorder the retrieval of c->page to
> - * come before c->freelist then an interrupt could
> - * change the cpu slab before we retrieve c->freelist. We
> - * could be matching on a page no longer active and put the
> - * object onto the freelist of the wrong slab.
> + * come before c->freeoffset then an interrupt could change the
> + * cpu slab before we retrieve c->freelist. We could be matching
> + * on a page no longer active and put the object onto the
> + * freelist of the wrong slab.
> *
> - * On the other hand: If we already have the freelist pointer
> + * On the other hand: If we already have the freeoffset
> * then any change of cpu_slab will cause the cmpxchg to fail
> * since the freelist pointers are unique per slab.
> */
> @@ -1801,9 +1837,15 @@ static __always_inline void slab_free(st
> __slab_free(s, page, x, addr, c->offset);
> break;
> }
> - object[c->offset] = freelist;
> + object[c->offset] =
> + (void **)((unsigned long)page_address(c->page) |
> + (freeoffset & c->off_mask));
> stat(c, FREE_FASTPATH);
> - } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
> + newoffset = freeoffset + PAGE_SIZE;
> + newoffset &= ~c->off_mask;
> + newoffset |= (unsigned long)object & c->off_mask;
> + } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
> + != freeoffset);
Hmmm.. The cmpxchg_local was intended to check for a change of slab too
(addresses from different slabs are disjunct).
That is no longer possible since the upper bits are used by the
versioning? (Same issue in slab_alloc).
* Christoph Lameter ([email protected]) wrote:
>
> > Index: linux-2.6-lttng/mm/slub.c
> > ===================================================================
> > --- linux-2.6-lttng.orig/mm/slub.c 2008-02-27 20:41:14.000000000 -0500
> > +++ linux-2.6-lttng/mm/slub.c 2008-02-28 18:22:14.000000000 -0500
> > @@ -138,6 +138,22 @@ static inline void ClearSlabDebug(struct
> > page->flags &= ~SLABDEBUG;
> > }
> >
> > +static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
> > +{
> > + return (void **)((unsigned long)page_address(c->page)
> > + | (c->freeoffset & c->off_mask));
> > +}
>
> Hmmmm... page_address() is an expensive operation.
>
Hrm, this is why I kept a separate "freebase", as a sort of
page_address() cache.
> > @@ -1779,21 +1815,21 @@ static __always_inline void slab_free(st
> > struct kmem_cache_cpu *c;
> >
> > #ifdef SLUB_FASTPATH
> > - void **freelist;
> > + unsigned long freeoffset, newoffset;
> >
> > c = get_cpu_slab(s, raw_smp_processor_id());
> > debug_check_no_locks_freed(object, s->objsize);
> > do {
> > - freelist = c->freelist;
> > + freeoffset = c->freeoffset;
> > barrier();
> > /*
> > * If the compiler would reorder the retrieval of c->page to
> > - * come before c->freelist then an interrupt could
> > - * change the cpu slab before we retrieve c->freelist. We
> > - * could be matching on a page no longer active and put the
> > - * object onto the freelist of the wrong slab.
> > + * come before c->freeoffset then an interrupt could change the
> > + * cpu slab before we retrieve c->freelist. We could be matching
> > + * on a page no longer active and put the object onto the
> > + * freelist of the wrong slab.
> > *
> > - * On the other hand: If we already have the freelist pointer
> > + * On the other hand: If we already have the freeoffset
> > * then any change of cpu_slab will cause the cmpxchg to fail
> > * since the freelist pointers are unique per slab.
> > */
> > @@ -1801,9 +1837,15 @@ static __always_inline void slab_free(st
> > __slab_free(s, page, x, addr, c->offset);
> > break;
> > }
> > - object[c->offset] = freelist;
> > + object[c->offset] =
> > + (void **)((unsigned long)page_address(c->page) |
> > + (freeoffset & c->off_mask));
> > stat(c, FREE_FASTPATH);
> > - } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
> > + newoffset = freeoffset + PAGE_SIZE;
> > + newoffset &= ~c->off_mask;
> > + newoffset |= (unsigned long)object & c->off_mask;
> > + } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
> > + != freeoffset);
>
> Hmmm.. The cmpxchg_local was intended to check for a change of slab too
> (addresses from different slabs are disjunct).
> That is no longer possible since the upper bits are used by the
> versioning? (Same issue in slab_alloc).
>
Here is the trick : if, on top of the cmpxchg_local, we have an
interrupt that calls slab_alloc or slab_free which causes a change of
slab, this interrupt will have to go through the slow path.
These slow paths use set_freelist_ptr() to update the c->freeoffset,
which also increments the sequence number. When we return from
interrupt, the cmpxchg_local loop will fail because the sequence number
has changed.
In short, the we also use the versioning to check for change of slab.
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> In short, the we also use the versioning to check for change of slab.
Sounds good.
* Christoph Lameter ([email protected]) wrote:
> On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
>
> > In short, the we also use the versioning to check for change of slab.
>
> Sounds good.
>
Test results :
On a 3GHz Pentium 4, CONFIG_SMP=y, no preemption, single CPU, hyperthreading
Kernel 2.6.25-rc3 (complete config below)
Just to give away an overview of the results :
The "1. Kmalloc: Repeatedly allocate then free test", for a 32 bytes
allocation, takes :
10000 times kmalloc(32) -> 191 cycles kfree -> 179 cycles
10000 times kmalloc(32) -> 93 cycles kfree -> 172 cycles
For a speedup of 2 on the allocation and about the same speed for free.
For the alloc/free tests, we have a speedup of 3 for most of allocation
sizes. (as long as we are in the fast path)
* baseline : standard fast path, without freeoffset patch
Single thread testing
=====================
1. Kmalloc: Repeatedly allocate then free test
* baseline : standard fast path, without freeoffset patch
10000 times kmalloc(8) -> 182 cycles kfree -> 174 cycles
10000 times kmalloc(16) -> 185 cycles kfree -> 175 cycles
10000 times kmalloc(32) -> 191 cycles kfree -> 179 cycles
10000 times kmalloc(64) -> 208 cycles kfree -> 184 cycles
10000 times kmalloc(128) -> 260 cycles kfree -> 202 cycles
10000 times kmalloc(256) -> 367 cycles kfree -> 277 cycles
10000 times kmalloc(512) -> 394 cycles kfree -> 304 cycles
10000 times kmalloc(1024) -> 469 cycles kfree -> 397 cycles
10000 times kmalloc(2048) -> 417 cycles kfree -> 318 cycles
10000 times kmalloc(4096) -> 470 cycles kfree -> 356 cycles
10000 times kmalloc(8192) -> 692 cycles kfree -> 723 cycles
10000 times kmalloc(16384) -> 756 cycles kfree -> 830 cycles
* cmpxchg_local fast path with freeoffset patch
10000 times kmalloc(8) -> 79 cycles kfree -> 169 cycles
10000 times kmalloc(16) -> 83 cycles kfree -> 169 cycles
10000 times kmalloc(32) -> 93 cycles kfree -> 172 cycles
10000 times kmalloc(64) -> 110 cycles kfree -> 179 cycles
10000 times kmalloc(128) -> 161 cycles kfree -> 199 cycles
10000 times kmalloc(256) -> 279 cycles kfree -> 274 cycles
10000 times kmalloc(512) -> 329 cycles kfree -> 297 cycles
10000 times kmalloc(1024) -> 447 cycles kfree -> 387 cycles
10000 times kmalloc(2048) -> 342 cycles kfree -> 294 cycles
10000 times kmalloc(4096) -> 409 cycles kfree -> 363 cycles
10000 times kmalloc(8192) -> 695 cycles kfree -> 735 cycles
10000 times kmalloc(16384) -> 754 cycles kfree -> 843 cycles
2. Kmalloc: alloc/free test
* baseline : standard fast path, without freeoffset patch
10000 times kmalloc(8)/kfree -> 314 cycles
10000 times kmalloc(16)/kfree -> 314 cycles
10000 times kmalloc(32)/kfree -> 315 cycles
10000 times kmalloc(64)/kfree -> 314 cycles
10000 times kmalloc(128)/kfree -> 314 cycles
10000 times kmalloc(256)/kfree -> 326 cycles
10000 times kmalloc(512)/kfree -> 326 cycles
10000 times kmalloc(1024)/kfree -> 326 cycles
10000 times kmalloc(2048)/kfree -> 328 cycles
10000 times kmalloc(4096)/kfree -> 328 cycles
10000 times kmalloc(8192)/kfree -> 948 cycles
10000 times kmalloc(16384)/kfree -> 1006 cycles
* cmpxchg_local fast path with freeoffset patch
10000 times kmalloc(8)/kfree -> 107 cycles
10000 times kmalloc(16)/kfree -> 107 cycles
10000 times kmalloc(32)/kfree -> 107 cycles
10000 times kmalloc(64)/kfree -> 107 cycles
10000 times kmalloc(128)/kfree -> 107 cycles
10000 times kmalloc(256)/kfree -> 118 cycles
10000 times kmalloc(512)/kfree -> 117 cycles
10000 times kmalloc(1024)/kfree -> 117 cycles
10000 times kmalloc(2048)/kfree -> 120 cycles
10000 times kmalloc(4096)/kfree -> 120 cycles
10000 times kmalloc(8192)/kfree -> 957 cycles
10000 times kmalloc(16384)/kfree -> 1008 cycles
Concurrent allocs
=================
* baseline : standard fast path, without freeoffset patch
Kmalloc N*alloc N*free(8): 0=189/172 Average=189/172
Kmalloc N*alloc N*free(16): 0=183/173 Average=183/173
Kmalloc N*alloc N*free(32): 0=190/176 Average=190/176
Kmalloc N*alloc N*free(64): 0=209/181 Average=209/181
Kmalloc N*alloc N*free(128): 0=261/199 Average=261/199
Kmalloc N*alloc N*free(256): 0=378/276 Average=378/276
Kmalloc N*alloc N*free(512): 0=405/307 Average=405/307
Kmalloc N*alloc N*free(1024): 0=470/398 Average=470/398
Kmalloc N*alloc N*free(2048): 0=411/288 Average=411/288
Kmalloc N*alloc N*free(4096): 0=481/354 Average=481/354
Kmalloc N*(alloc free)(8): 0=316 Average=316
Kmalloc N*(alloc free)(16): 0=314 Average=314
Kmalloc N*(alloc free)(32): 0=314 Average=314
Kmalloc N*(alloc free)(64): 0=314 Average=314
Kmalloc N*(alloc free)(128): 0=314 Average=314
Kmalloc N*(alloc free)(256): 0=326 Average=326
Kmalloc N*(alloc free)(512): 0=326 Average=326
Kmalloc N*(alloc free)(1024): 0=324 Average=324
Kmalloc N*(alloc free)(2048): 0=326 Average=326
Kmalloc N*(alloc free)(4096): 0=326 Average=326
* cmpxchg_local fast path with freeoffset patch
Kmalloc N*alloc N*free(8): 0=82/169 Average=82/169
Kmalloc N*alloc N*free(16): 0=84/169 Average=84/169
Kmalloc N*alloc N*free(32): 0=94/173 Average=94/173
Kmalloc N*alloc N*free(64): 0=109/179 Average=109/179
Kmalloc N*alloc N*free(128): 0=168/198 Average=168/198
Kmalloc N*alloc N*free(256): 0=291/273 Average=291/273
Kmalloc N*alloc N*free(512): 0=334/305 Average=334/305
Kmalloc N*alloc N*free(1024): 0=454/396 Average=454/396
Kmalloc N*alloc N*free(2048): 0=349/290 Average=349/290
Kmalloc N*alloc N*free(4096): 0=412/354 Average=412/354
Kmalloc N*(alloc free)(8): 0=109 Average=109
Kmalloc N*(alloc free)(16): 0=110 Average=110
Kmalloc N*(alloc free)(32): 0=108 Average=108
Kmalloc N*(alloc free)(64): 0=108 Average=108
Kmalloc N*(alloc free)(128): 0=108 Average=108
Kmalloc N*(alloc free)(256): 0=118 Average=118
Kmalloc N*(alloc free)(512): 0=117 Average=117
Kmalloc N*(alloc free)(1024): 0=118 Average=118
Kmalloc N*(alloc free)(2048): 0=121 Average=121
Kmalloc N*(alloc free)(4096): 0=122 Average=122
* Patch implementation
applies after reverting
commit 00e962c5408b9f2d0bebd2308673fe982cb9a5fe
Implement slub fastpath in terms of freebase and freeoffset
It allows the cmpxchg_local to detect object re-use by keeping a counter in the
freeoffset MSBs.
freeoffset & c->off_mask is the offset of the freelist element within the page
freeoffset & ~c->off_mask is the counter to detect object re-use..
freebase is the address of the page in this the object is located. It is a
multiple of c->off_mask + 1.
Whenever an object is freed in the cpu slab cache, the counter is incremented.
Whenever the alloc/free slow paths are modifying the freeoffset or freebase, the
freeoffset counter is also incremented. It is used to make sure we know if
freebase has been modified in an interrupt nested over the fast path.
Signed-off-by: Mathieu Desnoyers <[email protected]>
CC: Christoph Lameter <[email protected]>
---
include/linux/slub_def.h | 10 +++-
mm/slub.c | 115 ++++++++++++++++++++++++++++++++++-------------
2 files changed, 94 insertions(+), 31 deletions(-)
Index: linux-2.6-lttng/include/linux/slub_def.h
===================================================================
--- linux-2.6-lttng.orig/include/linux/slub_def.h 2008-02-27 20:40:48.000000000 -0500
+++ linux-2.6-lttng/include/linux/slub_def.h 2008-02-28 20:59:06.000000000 -0500
@@ -32,7 +32,15 @@ enum stat_item {
NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu {
- void **freelist; /* Pointer to first free per cpu object */
+ unsigned long freeoffset; /*
+ * Offset of the first free per cpu
+ * object. The MSBs are used as a
+ * counter which must be incremented
+ * each time an object is freed and each
+ * time freebase is changed.
+ */
+ unsigned long off_mask; /* freeoffset offset LSB mask */
+ unsigned long freebase; /* page address of the first free per cpu obj */
struct page *page; /* The slab from which we are allocating */
int node; /* The node of the page (or -1 for debug) */
unsigned int offset; /* Freepointer offset (in word units) */
Index: linux-2.6-lttng/mm/slub.c
===================================================================
--- linux-2.6-lttng.orig/mm/slub.c 2008-02-27 20:41:14.000000000 -0500
+++ linux-2.6-lttng/mm/slub.c 2008-02-28 21:09:57.000000000 -0500
@@ -139,6 +139,30 @@ static inline void ClearSlabDebug(struct
}
/*
+ * Should always be called with interrupts disabled to make sure we see a
+ * consistent freebase and freeoffset pair.
+ */
+static inline void **get_freelist_ptr(struct kmem_cache_cpu *c)
+{
+ return (void **)(c->freebase | (c->freeoffset & c->off_mask));
+}
+
+/*
+ * Should always be called with interrupts disabled to make sure an interrupt
+ * sees a consistent freebase and freeoffset pair.
+ */
+static inline void set_freelist_ptr(struct kmem_cache_cpu *c, void **freelist)
+{
+ unsigned long offset;
+
+ c->freebase = (unsigned long)freelist & ~c->off_mask;
+ offset = c->freeoffset + c->off_mask + 1;
+ offset &= ~c->off_mask;
+ offset |= (unsigned long)freelist & c->off_mask;
+ c->freeoffset = offset;
+}
+
+/*
* Issues still to be resolved:
*
* - Support PAGE_ALLOC_DEBUG. Should be easy to do.
@@ -305,9 +329,9 @@ static inline struct kmem_cache_cpu *get
* Note that SLUB relies on page_mapping returning NULL for pages with bit 0
* in the mapping set.
*/
-static inline int is_end(void *addr)
+static inline int is_end(unsigned long offset)
{
- return (unsigned long)addr & PAGE_MAPPING_ANON;
+ return offset & PAGE_MAPPING_ANON;
}
static void *slab_address(struct page *page)
@@ -1411,7 +1435,7 @@ static void deactivate_slab(struct kmem_
struct page *page = c->page;
int tail = 1;
- if (c->freelist)
+ if (is_end(c->freeoffset))
stat(c, DEACTIVATE_REMOTE_FREES);
/*
* Merge cpu freelist into freelist. Typically we get here
@@ -1422,14 +1446,14 @@ static void deactivate_slab(struct kmem_
* be called for a debug slab. Then c->freelist may contain
* a dummy pointer.
*/
- while (unlikely(!is_end(c->freelist))) {
+ while (unlikely(!is_end(c->freeoffset))) {
void **object;
tail = 0; /* Hot objects. Put the slab first */
/* Retrieve object from cpu_freelist */
- object = c->freelist;
- c->freelist = c->freelist[c->offset];
+ object = get_freelist_ptr(c);
+ set_freelist_ptr(c, object[c->offset]);
/* And put onto the regular freelist */
object[c->offset] = page->freelist;
@@ -1534,7 +1558,7 @@ load_freelist:
goto debug;
object = c->page->freelist;
- c->freelist = object[c->offset];
+ set_freelist_ptr(c, object[c->offset]);
c->page->inuse = s->objects;
c->page->freelist = c->page->end;
c->node = page_to_nid(c->page);
@@ -1636,28 +1660,47 @@ static __always_inline void *slab_alloc(
*/
#ifdef SLUB_FASTPATH
+ unsigned long freeoffset, newoffset;
+
c = get_cpu_slab(s, raw_smp_processor_id());
do {
- object = c->freelist;
- if (unlikely(is_end(object) || !node_match(c, node))) {
+ freeoffset = c->freeoffset;
+ if (unlikely(is_end(freeoffset) || !node_match(c, node))) {
object = __slab_alloc(s, gfpflags, node, addr, c);
break;
}
+ /*
+ * Whenever c->freebase is changed, the freeoffset version
+ * _must_ be incremented. This barrier insures we read
+ * freeoffset before c->freebase wrt interrupts.
+ */
+ barrier();
+ object = (void **)(c->freebase | (freeoffset & c->off_mask));
stat(c, ALLOC_FASTPATH);
- } while (cmpxchg_local(&c->freelist, object, object[c->offset])
- != object);
+ /* No need to increment the MSB counter here, because only
+ * object free will lead to counter re-use. */
+ newoffset = freeoffset;
+ newoffset &= ~c->off_mask;
+ newoffset |= (unsigned long)object[c->offset] & c->off_mask;
+ } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
+ != freeoffset);
#else
unsigned long flags;
local_irq_save(flags);
c = get_cpu_slab(s, smp_processor_id());
- if (unlikely(is_end(c->freelist) || !node_match(c, node)))
+ if (unlikely(is_end(c->freeoffset) || !node_match(c, node)))
object = __slab_alloc(s, gfpflags, node, addr, c);
else {
- object = c->freelist;
- c->freelist = object[c->offset];
+ object = get_freelist_ptr(c);
+ /*
+ * No need to increment freeoffset of PAGE_SIZE, so we simply
+ * update the freeoffset LSB here.
+ */
+ c->freeoffset &= ~c->off_mask;
+ c->freeoffset |= (unsigned long)object[c->offset] & c->off_mask;
stat(c, ALLOC_FASTPATH);
}
local_irq_restore(flags);
@@ -1779,21 +1822,21 @@ static __always_inline void slab_free(st
struct kmem_cache_cpu *c;
#ifdef SLUB_FASTPATH
- void **freelist;
+ unsigned long freeoffset, newoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
debug_check_no_locks_freed(object, s->objsize);
do {
- freelist = c->freelist;
+ freeoffset = c->freeoffset;
barrier();
/*
- * If the compiler would reorder the retrieval of c->page to
- * come before c->freelist then an interrupt could
- * change the cpu slab before we retrieve c->freelist. We
- * could be matching on a page no longer active and put the
+ * If the compiler would reorder the retrieval of c->page and
+ * c->freebase to come before c->freeoffset then an interrupt
+ * could change the cpu slab before we retrieve c->freeoffset.
+ * We could be matching on a page no longer active and put the
* object onto the freelist of the wrong slab.
*
- * On the other hand: If we already have the freelist pointer
+ * On the other hand: If we already have the freeoffset
* then any change of cpu_slab will cause the cmpxchg to fail
* since the freelist pointers are unique per slab.
*/
@@ -1801,9 +1844,14 @@ static __always_inline void slab_free(st
__slab_free(s, page, x, addr, c->offset);
break;
}
- object[c->offset] = freelist;
+ object[c->offset] =
+ (void **)(c->freebase | (freeoffset & c->off_mask));
stat(c, FREE_FASTPATH);
- } while (cmpxchg_local(&c->freelist, freelist, object) != freelist);
+ newoffset = freeoffset + c->off_mask + 1;
+ newoffset &= ~c->off_mask;
+ newoffset |= (unsigned long)object & c->off_mask;
+ } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
+ != freeoffset);
#else
unsigned long flags;
@@ -1811,8 +1859,13 @@ static __always_inline void slab_free(st
debug_check_no_locks_freed(object, s->objsize);
c = get_cpu_slab(s, smp_processor_id());
if (likely(page == c->page && c->node >= 0)) {
- object[c->offset] = c->freelist;
- c->freelist = object;
+ object[c->offset] = get_freelist_ptr(c);
+ /*
+ * No need to update c->page here, so simply update freeoffset.
+ */
+ c->freeoffset += c->off_mask + 1;
+ c->freeoffset &= ~c->off_mask;
+ c->freeoffset |= (unsigned long)object & c->off_mask;
stat(c, FREE_FASTPATH);
} else
__slab_free(s, page, x, addr, c->offset);
@@ -1995,7 +2048,9 @@ static void init_kmem_cache_cpu(struct k
struct kmem_cache_cpu *c)
{
c->page = NULL;
- c->freelist = (void *)PAGE_MAPPING_ANON;
+ c->freeoffset = PAGE_MAPPING_ANON;
+ c->freebase = 0;
+ c->off_mask = (PAGE_SIZE << s->order) - 1;
c->node = 0;
c->offset = s->offset / sizeof(void *);
c->objsize = s->objsize;
@@ -2041,9 +2096,9 @@ static struct kmem_cache_cpu *alloc_kmem
{
struct kmem_cache_cpu *c = per_cpu(kmem_cache_cpu_free, cpu);
- if (c)
- per_cpu(kmem_cache_cpu_free, cpu) =
- (void *)c->freelist;
+ if (c) {
+ per_cpu(kmem_cache_cpu_free, cpu) = (void *)get_freelist_ptr(c);
+ }
else {
/* Table overflow: So allocate ourselves */
c = kmalloc_node(
@@ -2064,7 +2119,7 @@ static void free_kmem_cache_cpu(struct k
kfree(c);
return;
}
- c->freelist = (void *)per_cpu(kmem_cache_cpu_free, cpu);
+ set_freelist_ptr(c, (void *)per_cpu(kmem_cache_cpu_free, cpu));
per_cpu(kmem_cache_cpu_free, cpu) = c;
}
* Configuration used
#
# Automatically generated make config: don't edit
# Linux kernel version: 2.6.25-rc3
# Thu Feb 28 21:51:46 2008
#
# CONFIG_64BIT is not set
CONFIG_X86_32=y
# CONFIG_X86_64 is not set
CONFIG_X86=y
# CONFIG_GENERIC_LOCKBREAK is not set
CONFIG_GENERIC_TIME=y
CONFIG_GENERIC_CMOS_UPDATE=y
CONFIG_CLOCKSOURCE_WATCHDOG=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_SEMAPHORE_SLEEPERS=y
CONFIG_FAST_CMPXCHG_LOCAL=y
CONFIG_MMU=y
CONFIG_ZONE_DMA=y
CONFIG_QUICKLIST=y
CONFIG_GENERIC_ISA_DMA=y
CONFIG_GENERIC_IOMAP=y
CONFIG_GENERIC_BUG=y
CONFIG_GENERIC_HWEIGHT=y
# CONFIG_GENERIC_GPIO is not set
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_DMI=y
# CONFIG_RWSEM_GENERIC_SPINLOCK is not set
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
# CONFIG_ARCH_HAS_ILOG2_U32 is not set
# CONFIG_ARCH_HAS_ILOG2_U64 is not set
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
# CONFIG_GENERIC_TIME_VSYSCALL is not set
CONFIG_ARCH_HAS_CPU_RELAX=y
# CONFIG_HAVE_SETUP_PER_CPU_AREA is not set
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ZONE_DMA32 is not set
CONFIG_ARCH_POPULATES_NODE_MAP=y
# CONFIG_AUDIT_ARCH is not set
CONFIG_ARCH_SUPPORTS_AOUT=y
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_GENERIC_PENDING_IRQ=y
CONFIG_X86_SMP=y
CONFIG_X86_32_SMP=y
CONFIG_X86_HT=y
CONFIG_X86_BIOS_REBOOT=y
CONFIG_X86_TRAMPOLINE=y
CONFIG_KTIME_SCALAR=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_LOCK_KERNEL=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_LOCALVERSION="-testssmp"
# CONFIG_LOCALVERSION_AUTO is not set
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_TASKSTATS is not set
CONFIG_AUDIT=y
CONFIG_AUDITSYSCALL=y
CONFIG_AUDIT_TREE=y
# CONFIG_IKCONFIG is not set
CONFIG_LOG_BUF_SHIFT=17
# CONFIG_CGROUPS is not set
# CONFIG_GROUP_SCHED is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_RELAY=y
# CONFIG_NAMESPACES is not set
# CONFIG_BLK_DEV_INITRD is not set
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_SYSCTL=y
CONFIG_EMBEDDED=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
CONFIG_KALLSYMS=y
# CONFIG_KALLSYMS_EXTRA_PASS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_COMPAT_BRK=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_ANON_INODES=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_SLUB_DEBUG is not set
# CONFIG_SLAB is not set
CONFIG_SLUB=y
# CONFIG_SLOB is not set
CONFIG_PROFILING=y
CONFIG_MARKERS=y
CONFIG_OPROFILE=m
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_HAVE_KPROBES=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
# CONFIG_TINY_SHMEM is not set
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_UNLOAD=y
# CONFIG_MODULE_FORCE_UNLOAD is not set
# CONFIG_MODVERSIONS is not set
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_KMOD=y
CONFIG_STOP_MACHINE=y
CONFIG_BLOCK=y
CONFIG_LBD=y
CONFIG_BLK_DEV_IO_TRACE=y
CONFIG_LSF=y
# CONFIG_BLK_DEV_BSG is not set
#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
CONFIG_IOSCHED_AS=y
CONFIG_IOSCHED_DEADLINE=y
CONFIG_IOSCHED_CFQ=y
CONFIG_DEFAULT_AS=y
# CONFIG_DEFAULT_DEADLINE is not set
# CONFIG_DEFAULT_CFQ is not set
# CONFIG_DEFAULT_NOOP is not set
CONFIG_DEFAULT_IOSCHED="anticipatory"
CONFIG_CLASSIC_RCU=y
# CONFIG_PREEMPT_RCU is not set
#
# Processor type and features
#
# CONFIG_TICK_ONESHOT is not set
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_SMP=y
CONFIG_X86_PC=y
# CONFIG_X86_ELAN is not set
# CONFIG_X86_VOYAGER is not set
# CONFIG_X86_NUMAQ is not set
# CONFIG_X86_SUMMIT is not set
# CONFIG_X86_BIGSMP is not set
# CONFIG_X86_VISWS is not set
# CONFIG_X86_GENERICARCH is not set
# CONFIG_X86_ES7000 is not set
# CONFIG_X86_RDC321X is not set
# CONFIG_X86_VSMP is not set
CONFIG_SCHED_NO_NO_OMIT_FRAME_POINTER=y
CONFIG_PARAVIRT_GUEST=y
# CONFIG_XEN is not set
# CONFIG_VMI is not set
# CONFIG_LGUEST_GUEST is not set
CONFIG_PARAVIRT=y
# CONFIG_M386 is not set
# CONFIG_M486 is not set
# CONFIG_M586 is not set
# CONFIG_M586TSC is not set
# CONFIG_M586MMX is not set
# CONFIG_M686 is not set
# CONFIG_MPENTIUMII is not set
# CONFIG_MPENTIUMIII is not set
# CONFIG_MPENTIUMM is not set
CONFIG_MPENTIUM4=y
# CONFIG_MK6 is not set
# CONFIG_MK7 is not set
# CONFIG_MK8 is not set
# CONFIG_MCRUSOE is not set
# CONFIG_MEFFICEON is not set
# CONFIG_MWINCHIPC6 is not set
# CONFIG_MWINCHIP2 is not set
# CONFIG_MWINCHIP3D is not set
# CONFIG_MGEODEGX1 is not set
# CONFIG_MGEODE_LX is not set
# CONFIG_MCYRIXIII is not set
# CONFIG_MVIAC3_2 is not set
# CONFIG_MVIAC7 is not set
# CONFIG_MPSC is not set
# CONFIG_MCORE2 is not set
# CONFIG_GENERIC_CPU is not set
# CONFIG_X86_GENERIC is not set
CONFIG_X86_CMPXCHG=y
CONFIG_X86_L1_CACHE_SHIFT=7
CONFIG_X86_XADD=y
CONFIG_X86_WP_WORKS_OK=y
CONFIG_X86_INVLPG=y
CONFIG_X86_BSWAP=y
CONFIG_X86_POPAD_OK=y
CONFIG_X86_GOOD_APIC=y
CONFIG_X86_INTEL_USERCOPY=y
CONFIG_X86_USE_PPRO_CHECKSUM=y
CONFIG_X86_TSC=y
CONFIG_X86_CMOV=y
CONFIG_X86_MINIMUM_CPU_FAMILY=4
CONFIG_X86_DEBUGCTLMSR=y
# CONFIG_HPET_TIMER is not set
# CONFIG_IOMMU_HELPER is not set
CONFIG_NR_CPUS=8
CONFIG_SCHED_SMT=y
CONFIG_SCHED_MC=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set
CONFIG_RCU_TRACE=y
CONFIG_X86_LOCAL_APIC=y
CONFIG_X86_IO_APIC=y
CONFIG_X86_MCE=y
CONFIG_X86_MCE_NONFATAL=y
# CONFIG_X86_MCE_P4THERMAL is not set
CONFIG_VM86=y
# CONFIG_TOSHIBA is not set
# CONFIG_I8K is not set
# CONFIG_X86_REBOOTFIXUPS is not set
# CONFIG_MICROCODE is not set
# CONFIG_X86_MSR is not set
# CONFIG_X86_CPUID is not set
# CONFIG_NOHIGHMEM is not set
CONFIG_HIGHMEM4G=y
# CONFIG_HIGHMEM64G is not set
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_3G_OPT is not set
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_2G_OPT is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_HIGHMEM=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_DISCONTIGMEM_MANUAL is not set
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_STATIC=y
# CONFIG_SPARSEMEM_VMEMMAP_ENABLE is not set
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_RESOURCES_64BIT is not set
CONFIG_ZONE_DMA_FLAG=1
CONFIG_BOUNCE=y
CONFIG_NR_QUICK=1
CONFIG_VIRT_TO_BUS=y
# CONFIG_HIGHPTE is not set
# CONFIG_MATH_EMULATION is not set
CONFIG_MTRR=y
CONFIG_IRQBALANCE=y
CONFIG_SECCOMP=y
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
# CONFIG_SCHED_HRTICK is not set
CONFIG_KEXEC=y
# CONFIG_CRASH_DUMP is not set
CONFIG_PHYSICAL_START=0x100000
# CONFIG_RELOCATABLE is not set
CONFIG_PHYSICAL_ALIGN=0x100000
CONFIG_HOTPLUG_CPU=y
CONFIG_COMPAT_VDSO=y
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
#
# Power management options
#
CONFIG_PM=y
# CONFIG_PM_LEGACY is not set
# CONFIG_PM_DEBUG is not set
CONFIG_PM_SLEEP_SMP=y
CONFIG_PM_SLEEP=y
CONFIG_SUSPEND=y
CONFIG_SUSPEND_FREEZER=y
# CONFIG_HIBERNATION is not set
# CONFIG_ACPI is not set
# CONFIG_APM is not set
#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set
# CONFIG_CPU_IDLE is not set
#
# Bus options (PCI etc.)
#
CONFIG_PCI=y
# CONFIG_PCI_GOBIOS is not set
# CONFIG_PCI_GOMMCONFIG is not set
# CONFIG_PCI_GODIRECT is not set
CONFIG_PCI_GOANY=y
CONFIG_PCI_BIOS=y
CONFIG_PCI_DIRECT=y
CONFIG_PCI_DOMAINS=y
# CONFIG_PCIEPORTBUS is not set
CONFIG_ARCH_SUPPORTS_MSI=y
# CONFIG_PCI_MSI is not set
CONFIG_PCI_LEGACY=y
CONFIG_HT_IRQ=y
CONFIG_ISA_DMA_API=y
CONFIG_ISA=y
# CONFIG_EISA is not set
# CONFIG_MCA is not set
# CONFIG_SCx200 is not set
# CONFIG_PCCARD is not set
# CONFIG_HOTPLUG_PCI is not set
#
# Executable file formats / Emulations
#
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_AOUT=y
CONFIG_BINFMT_MISC=y
#
# Networking
#
CONFIG_NET=y
#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_UNIX=y
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_FIB_HASH=y
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
# CONFIG_INET_TUNNEL is not set
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
# CONFIG_IP_VS is not set
# CONFIG_IPV6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
CONFIG_NETFILTER_ADVANCED=y
#
# Core Netfilter Configuration
#
CONFIG_NETFILTER_NETLINK=m
CONFIG_NETFILTER_NETLINK_QUEUE=m
CONFIG_NETFILTER_NETLINK_LOG=m
# CONFIG_NF_CONNTRACK is not set
# CONFIG_NETFILTER_XTABLES is not set
#
# IP: Netfilter Configuration
#
CONFIG_IP_NF_QUEUE=y
# CONFIG_IP_NF_IPTABLES is not set
# CONFIG_IP_NF_ARPTABLES is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_BRIDGE is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_SCHED is not set
#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_TCPPROBE is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
#
# Wireless
#
# CONFIG_CFG80211 is not set
# CONFIG_WIRELESS_EXT is not set
# CONFIG_MAC80211 is not set
CONFIG_IEEE80211=m
CONFIG_IEEE80211_DEBUG=y
CONFIG_IEEE80211_CRYPT_WEP=m
CONFIG_IEEE80211_CRYPT_CCMP=m
# CONFIG_IEEE80211_CRYPT_TKIP is not set
# CONFIG_IEEE80211_SOFTMAC is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
#
# Device Drivers
#
#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=m
# CONFIG_SYS_HYPERVISOR is not set
CONFIG_CONNECTOR=y
CONFIG_PROC_EVENTS=y
# CONFIG_MTD is not set
CONFIG_PARPORT=y
CONFIG_PARPORT_PC=y
# CONFIG_PARPORT_SERIAL is not set
# CONFIG_PARPORT_PC_FIFO is not set
# CONFIG_PARPORT_PC_SUPERIO is not set
# CONFIG_PARPORT_GSC is not set
# CONFIG_PARPORT_AX88796 is not set
# CONFIG_PARPORT_1284 is not set
CONFIG_PNP=y
# CONFIG_PNP_DEBUG is not set
#
# Protocols
#
# CONFIG_ISAPNP is not set
# CONFIG_PNPBIOS is not set
# CONFIG_PNPACPI is not set
CONFIG_BLK_DEV=y
CONFIG_BLK_DEV_FD=y
# CONFIG_BLK_DEV_XD is not set
# CONFIG_PARIDE is not set
# CONFIG_BLK_CPQ_DA is not set
# CONFIG_BLK_CPQ_CISS_DA is not set
# CONFIG_BLK_DEV_DAC960 is not set
# CONFIG_BLK_DEV_UMEM is not set
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SX8 is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
CONFIG_MISC_DEVICES=y
# CONFIG_IBM_ASM is not set
# CONFIG_PHANTOM is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ENCLOSURE_SERVICES is not set
CONFIG_HAVE_IDE=y
CONFIG_IDE=y
CONFIG_IDE_MAX_HWIFS=4
CONFIG_BLK_DEV_IDE=y
#
# Please see Documentation/ide.txt for help/info on IDE drives
#
# CONFIG_BLK_DEV_IDE_SATA is not set
# CONFIG_BLK_DEV_HD_IDE is not set
CONFIG_BLK_DEV_IDEDISK=y
CONFIG_IDEDISK_MULTI_MODE=y
CONFIG_BLK_DEV_IDECD=y
CONFIG_BLK_DEV_IDECD_VERBOSE_ERRORS=y
# CONFIG_BLK_DEV_IDETAPE is not set
# CONFIG_BLK_DEV_IDEFLOPPY is not set
# CONFIG_BLK_DEV_IDESCSI is not set
# CONFIG_IDE_TASK_IOCTL is not set
CONFIG_IDE_PROC_FS=y
#
# IDE chipset support/bugfixes
#
CONFIG_IDE_GENERIC=y
# CONFIG_BLK_DEV_PLATFORM is not set
# CONFIG_BLK_DEV_CMD640 is not set
# CONFIG_BLK_DEV_IDEPNP is not set
CONFIG_BLK_DEV_IDEDMA_SFF=y
#
# PCI IDE chipsets support
#
CONFIG_BLK_DEV_IDEPCI=y
CONFIG_IDEPCI_PCIBUS_ORDER=y
# CONFIG_BLK_DEV_OFFBOARD is not set
CONFIG_BLK_DEV_GENERIC=y
# CONFIG_BLK_DEV_OPTI621 is not set
CONFIG_BLK_DEV_RZ1000=y
CONFIG_BLK_DEV_IDEDMA_PCI=y
# CONFIG_BLK_DEV_AEC62XX is not set
# CONFIG_BLK_DEV_ALI15X3 is not set
# CONFIG_BLK_DEV_AMD74XX is not set
# CONFIG_BLK_DEV_ATIIXP is not set
# CONFIG_BLK_DEV_CMD64X is not set
# CONFIG_BLK_DEV_TRIFLEX is not set
# CONFIG_BLK_DEV_CY82C693 is not set
# CONFIG_BLK_DEV_CS5520 is not set
# CONFIG_BLK_DEV_CS5530 is not set
# CONFIG_BLK_DEV_CS5535 is not set
# CONFIG_BLK_DEV_HPT34X is not set
# CONFIG_BLK_DEV_HPT366 is not set
# CONFIG_BLK_DEV_JMICRON is not set
# CONFIG_BLK_DEV_SC1200 is not set
CONFIG_BLK_DEV_PIIX=y
# CONFIG_BLK_DEV_IT8213 is not set
# CONFIG_BLK_DEV_IT821X is not set
# CONFIG_BLK_DEV_NS87415 is not set
# CONFIG_BLK_DEV_PDC202XX_OLD is not set
# CONFIG_BLK_DEV_PDC202XX_NEW is not set
# CONFIG_BLK_DEV_SVWKS is not set
# CONFIG_BLK_DEV_SIIMAGE is not set
# CONFIG_BLK_DEV_SIS5513 is not set
# CONFIG_BLK_DEV_SLC90E66 is not set
# CONFIG_BLK_DEV_TRM290 is not set
# CONFIG_BLK_DEV_VIA82CXXX is not set
# CONFIG_BLK_DEV_TC86C001 is not set
#
# Other IDE chipsets support
#
#
# Note: most of these also require special kernel boot parameters
#
# CONFIG_BLK_DEV_4DRIVES is not set
# CONFIG_BLK_DEV_ALI14XX is not set
# CONFIG_BLK_DEV_DTC2278 is not set
# CONFIG_BLK_DEV_HT6560B is not set
# CONFIG_BLK_DEV_QD65XX is not set
# CONFIG_BLK_DEV_UMC8672 is not set
CONFIG_BLK_DEV_IDEDMA=y
CONFIG_IDE_ARCH_OBSOLETE_INIT=y
# CONFIG_BLK_DEV_HD is not set
#
# SCSI device support
#
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
CONFIG_SCSI_PROC_FS=y
#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs
#
# CONFIG_SCSI_MULTI_LUN is not set
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set
# CONFIG_SCSI_SCAN_ASYNC is not set
CONFIG_SCSI_WAIT_SCAN=m
#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
CONFIG_SCSI_ISCSI_ATTRS=m
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_7000FASST is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AHA152X is not set
# CONFIG_SCSI_AHA1542 is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC7XXX_OLD is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
CONFIG_SCSI_DPT_I2O=m
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_IN2000 is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_BUSLOGIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_DTC3280 is not set
# CONFIG_SCSI_EATA is not set
# CONFIG_SCSI_FUTURE_DOMAIN is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_GENERIC_NCR5380 is not set
# CONFIG_SCSI_GENERIC_NCR5380_MMIO is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_PPA is not set
# CONFIG_SCSI_IMM is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_NCR53C406A is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_PAS16 is not set
# CONFIG_SCSI_QLOGIC_FAS is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_FC is not set
CONFIG_SCSI_QLA_ISCSI=m
# CONFIG_SCSI_LPFC is not set
# CONFIG_SCSI_SYM53C416 is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_DC390T is not set
# CONFIG_SCSI_T128 is not set
# CONFIG_SCSI_U14_34F is not set
# CONFIG_SCSI_ULTRASTOR is not set
# CONFIG_SCSI_NSP32 is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_SRP is not set
CONFIG_ATA=y
# CONFIG_ATA_NONSTANDARD is not set
# CONFIG_SATA_AHCI is not set
# CONFIG_SATA_SVW is not set
CONFIG_ATA_PIIX=y
CONFIG_SATA_MV=m
# CONFIG_SATA_NV is not set
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SX4 is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIL24 is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set
# CONFIG_SATA_INIC162X is not set
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CS5520 is not set
# CONFIG_PATA_CS5530 is not set
# CONFIG_PATA_CS5535 is not set
# CONFIG_PATA_CS5536 is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_LEGACY is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_QDI is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RZ1000 is not set
# CONFIG_PATA_SC1200 is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set
# CONFIG_PATA_WINBOND_VLB is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_MD is not set
# CONFIG_FUSION is not set
#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
CONFIG_IEEE1394=y
#
# Subsystem Options
#
# CONFIG_IEEE1394_VERBOSEDEBUG is not set
#
# Controllers
#
#
# Texas Instruments PCILynx requires I2C
#
CONFIG_IEEE1394_OHCI1394=y
#
# Protocols
#
# CONFIG_IEEE1394_VIDEO1394 is not set
# CONFIG_IEEE1394_SBP2 is not set
# CONFIG_IEEE1394_ETH1394_ROM_ENTRY is not set
# CONFIG_IEEE1394_ETH1394 is not set
# CONFIG_IEEE1394_DV1394 is not set
CONFIG_IEEE1394_RAWIO=y
# CONFIG_I2O is not set
CONFIG_MACINTOSH_DRIVERS=y
# CONFIG_MAC_EMUMOUSEBTN is not set
CONFIG_NETDEVICES=y
# CONFIG_NETDEVICES_MULTIQUEUE is not set
CONFIG_DUMMY=m
CONFIG_BONDING=m
# CONFIG_MACVLAN is not set
# CONFIG_EQUALIZER is not set
CONFIG_TUN=m
# CONFIG_VETH is not set
# CONFIG_NET_SB1000 is not set
# CONFIG_ARCNET is not set
# CONFIG_PHYLIB is not set
CONFIG_NET_ETHERNET=y
CONFIG_MII=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NET_VENDOR_3COM is not set
# CONFIG_LANCE is not set
# CONFIG_NET_VENDOR_SMC is not set
# CONFIG_NET_VENDOR_RACAL is not set
# CONFIG_NET_TULIP is not set
# CONFIG_AT1700 is not set
# CONFIG_DEPCA is not set
# CONFIG_HP100 is not set
# CONFIG_NET_ISA is not set
# CONFIG_IBM_NEW_EMAC_ZMII is not set
# CONFIG_IBM_NEW_EMAC_RGMII is not set
# CONFIG_IBM_NEW_EMAC_TAH is not set
# CONFIG_IBM_NEW_EMAC_EMAC4 is not set
CONFIG_NET_PCI=y
# CONFIG_PCNET32 is not set
# CONFIG_AMD8111_ETH is not set
# CONFIG_ADAPTEC_STARFIRE is not set
# CONFIG_AC3200 is not set
# CONFIG_APRICOT is not set
# CONFIG_B44 is not set
# CONFIG_FORCEDETH is not set
# CONFIG_CS89x0 is not set
# CONFIG_EEPRO100 is not set
# CONFIG_E100 is not set
# CONFIG_FEALNX is not set
# CONFIG_NATSEMI is not set
# CONFIG_NE2K_PCI is not set
# CONFIG_8139CP is not set
CONFIG_8139TOO=y
CONFIG_8139TOO_PIO=y
# CONFIG_8139TOO_TUNE_TWISTER is not set
# CONFIG_8139TOO_8129 is not set
# CONFIG_8139_OLD_RX_RESET is not set
# CONFIG_R6040 is not set
# CONFIG_SIS900 is not set
# CONFIG_EPIC100 is not set
# CONFIG_SUNDANCE is not set
# CONFIG_TLAN is not set
# CONFIG_VIA_RHINE is not set
# CONFIG_SC92031 is not set
# CONFIG_NET_POCKET is not set
CONFIG_NETDEV_1000=y
# CONFIG_ACENIC is not set
# CONFIG_DL2K is not set
# CONFIG_E1000 is not set
# CONFIG_E1000E is not set
# CONFIG_E1000E_ENABLED is not set
# CONFIG_IP1000 is not set
# CONFIG_IGB is not set
# CONFIG_NS83820 is not set
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
# CONFIG_R8169 is not set
# CONFIG_SIS190 is not set
CONFIG_SKGE=m
# CONFIG_SKGE_DEBUG is not set
CONFIG_SKY2=m
# CONFIG_SKY2_DEBUG is not set
# CONFIG_SK98LIN is not set
# CONFIG_VIA_VELOCITY is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2 is not set
# CONFIG_QLA3XXX is not set
# CONFIG_ATL1 is not set
CONFIG_NETDEV_10000=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGB is not set
CONFIG_S2IO=m
# CONFIG_S2IO_NAPI is not set
# CONFIG_MYRI10GE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_NIU is not set
# CONFIG_MLX4_CORE is not set
# CONFIG_TEHUTI is not set
# CONFIG_BNX2X is not set
# CONFIG_TR is not set
#
# Wireless LAN
#
# CONFIG_WLAN_PRE80211 is not set
# CONFIG_WLAN_80211 is not set
#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_WAN is not set
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
# CONFIG_PLIP is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
# CONFIG_NET_FC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_ISDN is not set
# CONFIG_PHONE is not set
#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
CONFIG_INPUT_POLLDEV=m
#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=y
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set
#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
CONFIG_KEYBOARD_ATKBD=y
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_XTKBD is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=y
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_LIFEBOOK=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_INPORT is not set
# CONFIG_MOUSE_LOGIBM is not set
# CONFIG_MOUSE_PC110PAD is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_SERIO_I8042=y
# CONFIG_SERIO_SERPORT is not set
# CONFIG_SERIO_CT82C710 is not set
# CONFIG_SERIO_PARKBD is not set
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_GAMEPORT is not set
#
# Character devices
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
#
# Serial drivers
#
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_FIX_EARLYCON_MEM=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_PNP=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
# CONFIG_SERIAL_8250_EXTENDED is not set
#
# Non-8250 serial port support
#
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
CONFIG_UNIX98_PTYS=y
CONFIG_LEGACY_PTYS=y
CONFIG_LEGACY_PTY_COUNT=256
CONFIG_PRINTER=y
# CONFIG_LP_CONSOLE is not set
# CONFIG_PPDEV is not set
# CONFIG_IPMI_HANDLER is not set
# CONFIG_HW_RANDOM is not set
# CONFIG_NVRAM is not set
CONFIG_RTC=m
# CONFIG_GEN_RTC is not set
# CONFIG_DTLK is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_SONYPI is not set
# CONFIG_MWAVE is not set
# CONFIG_PC8736x_GPIO is not set
# CONFIG_NSC_GPIO is not set
# CONFIG_CS5535_GPIO is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_TELCLOCK is not set
CONFIG_DEVPORT=y
# CONFIG_I2C is not set
#
# SPI support
#
# CONFIG_SPI is not set
# CONFIG_SPI_MASTER is not set
# CONFIG_W1 is not set
CONFIG_POWER_SUPPLY=y
# CONFIG_POWER_SUPPLY_DEBUG is not set
# CONFIG_PDA_POWER is not set
# CONFIG_BATTERY_DS2760 is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=m
# CONFIG_SENSORS_ABITUGURU is not set
# CONFIG_SENSORS_ABITUGURU3 is not set
# CONFIG_SENSORS_K8TEMP is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F71805F is not set
# CONFIG_SENSORS_F71882FG is not set
# CONFIG_SENSORS_CORETEMP is not set
CONFIG_SENSORS_IT87=m
# CONFIG_SENSORS_PC87360 is not set
# CONFIG_SENSORS_PC87427 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_SMSC47M1 is not set
# CONFIG_SENSORS_SMSC47B397 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT1211 is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83627HF is not set
# CONFIG_SENSORS_W83627EHF is not set
# CONFIG_SENSORS_HDAPS is not set
# CONFIG_SENSORS_APPLESMC is not set
# CONFIG_HWMON_DEBUG_CHIP is not set
CONFIG_THERMAL=y
# CONFIG_WATCHDOG is not set
#
# Sonics Silicon Backplane
#
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
#
# Multifunction device drivers
#
# CONFIG_MFD_SM501 is not set
#
# Multimedia devices
#
# CONFIG_VIDEO_DEV is not set
# CONFIG_DVB_CORE is not set
CONFIG_DAB=y
# CONFIG_USB_DABUSB is not set
#
# Graphics support
#
CONFIG_AGP=y
# CONFIG_AGP_ALI is not set
# CONFIG_AGP_ATI is not set
# CONFIG_AGP_AMD is not set
# CONFIG_AGP_AMD64 is not set
CONFIG_AGP_INTEL=y
# CONFIG_AGP_NVIDIA is not set
# CONFIG_AGP_SIS is not set
# CONFIG_AGP_SWORKS is not set
# CONFIG_AGP_VIA is not set
# CONFIG_AGP_EFFICEON is not set
CONFIG_DRM=y
# CONFIG_DRM_TDFX is not set
# CONFIG_DRM_R128 is not set
# CONFIG_DRM_RADEON is not set
# CONFIG_DRM_I810 is not set
# CONFIG_DRM_I830 is not set
# CONFIG_DRM_I915 is not set
# CONFIG_DRM_MGA is not set
# CONFIG_DRM_SIS is not set
# CONFIG_DRM_VIA is not set
# CONFIG_DRM_SAVAGE is not set
# CONFIG_VGASTATE is not set
CONFIG_VIDEO_OUTPUT_CONTROL=m
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
#
# Display device support
#
# CONFIG_DISPLAY_SUPPORT is not set
#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
# CONFIG_VIDEO_SELECT is not set
# CONFIG_MDA_CONSOLE is not set
CONFIG_DUMMY_CONSOLE=y
#
# Sound
#
CONFIG_SOUND=y
#
# Advanced Linux Sound Architecture
#
CONFIG_SND=y
CONFIG_SND_TIMER=y
CONFIG_SND_PCM=y
CONFIG_SND_SEQUENCER=y
# CONFIG_SND_SEQ_DUMMY is not set
CONFIG_SND_OSSEMUL=y
CONFIG_SND_MIXER_OSS=y
CONFIG_SND_PCM_OSS=y
CONFIG_SND_PCM_OSS_PLUGINS=y
CONFIG_SND_SEQUENCER_OSS=y
# CONFIG_SND_RTCTIMER is not set
# CONFIG_SND_DYNAMIC_MINORS is not set
CONFIG_SND_SUPPORT_OLD_API=y
CONFIG_SND_VERBOSE_PROCFS=y
# CONFIG_SND_VERBOSE_PRINTK is not set
# CONFIG_SND_DEBUG is not set
#
# Generic devices
#
CONFIG_SND_AC97_CODEC=y
# CONFIG_SND_DUMMY is not set
# CONFIG_SND_VIRMIDI is not set
# CONFIG_SND_MTPAV is not set
# CONFIG_SND_MTS64 is not set
# CONFIG_SND_SERIAL_U16550 is not set
# CONFIG_SND_MPU401 is not set
# CONFIG_SND_PORTMAN2X4 is not set
#
# ISA devices
#
# CONFIG_SND_ADLIB is not set
# CONFIG_SND_AD1816A is not set
# CONFIG_SND_AD1848 is not set
# CONFIG_SND_ALS100 is not set
# CONFIG_SND_AZT2320 is not set
# CONFIG_SND_CMI8330 is not set
# CONFIG_SND_CS4231 is not set
# CONFIG_SND_CS4232 is not set
# CONFIG_SND_CS4236 is not set
# CONFIG_SND_DT019X is not set
# CONFIG_SND_ES968 is not set
# CONFIG_SND_ES1688 is not set
# CONFIG_SND_ES18XX is not set
# CONFIG_SND_SC6000 is not set
# CONFIG_SND_GUSCLASSIC is not set
# CONFIG_SND_GUSEXTREME is not set
# CONFIG_SND_GUSMAX is not set
# CONFIG_SND_INTERWAVE is not set
# CONFIG_SND_INTERWAVE_STB is not set
# CONFIG_SND_OPL3SA2 is not set
# CONFIG_SND_OPTI92X_AD1848 is not set
# CONFIG_SND_OPTI92X_CS4231 is not set
# CONFIG_SND_OPTI93X is not set
# CONFIG_SND_MIRO is not set
# CONFIG_SND_SB8 is not set
# CONFIG_SND_SB16 is not set
# CONFIG_SND_SBAWE is not set
# CONFIG_SND_SGALAXY is not set
# CONFIG_SND_SSCAPE is not set
# CONFIG_SND_WAVEFRONT is not set
#
# PCI devices
#
# CONFIG_SND_AD1889 is not set
# CONFIG_SND_ALS300 is not set
# CONFIG_SND_ALS4000 is not set
# CONFIG_SND_ALI5451 is not set
# CONFIG_SND_ATIIXP is not set
# CONFIG_SND_ATIIXP_MODEM is not set
# CONFIG_SND_AU8810 is not set
# CONFIG_SND_AU8820 is not set
# CONFIG_SND_AU8830 is not set
# CONFIG_SND_AZT3328 is not set
# CONFIG_SND_BT87X is not set
# CONFIG_SND_CA0106 is not set
# CONFIG_SND_CMIPCI is not set
# CONFIG_SND_OXYGEN is not set
# CONFIG_SND_CS4281 is not set
# CONFIG_SND_CS46XX is not set
# CONFIG_SND_CS5530 is not set
# CONFIG_SND_CS5535AUDIO is not set
# CONFIG_SND_DARLA20 is not set
# CONFIG_SND_GINA20 is not set
# CONFIG_SND_LAYLA20 is not set
# CONFIG_SND_DARLA24 is not set
# CONFIG_SND_GINA24 is not set
# CONFIG_SND_LAYLA24 is not set
# CONFIG_SND_MONA is not set
# CONFIG_SND_MIA is not set
# CONFIG_SND_ECHO3G is not set
# CONFIG_SND_INDIGO is not set
# CONFIG_SND_INDIGOIO is not set
# CONFIG_SND_INDIGODJ is not set
# CONFIG_SND_EMU10K1 is not set
# CONFIG_SND_EMU10K1X is not set
# CONFIG_SND_ENS1370 is not set
# CONFIG_SND_ENS1371 is not set
# CONFIG_SND_ES1938 is not set
# CONFIG_SND_ES1968 is not set
# CONFIG_SND_FM801 is not set
CONFIG_SND_HDA_INTEL=m
# CONFIG_SND_HDA_HWDEP is not set
CONFIG_SND_HDA_CODEC_REALTEK=y
CONFIG_SND_HDA_CODEC_ANALOG=y
CONFIG_SND_HDA_CODEC_SIGMATEL=y
CONFIG_SND_HDA_CODEC_VIA=y
CONFIG_SND_HDA_CODEC_ATIHDMI=y
CONFIG_SND_HDA_CODEC_CONEXANT=y
CONFIG_SND_HDA_CODEC_CMEDIA=y
CONFIG_SND_HDA_CODEC_SI3054=y
CONFIG_SND_HDA_GENERIC=y
# CONFIG_SND_HDA_POWER_SAVE is not set
# CONFIG_SND_HDSP is not set
# CONFIG_SND_HDSPM is not set
# CONFIG_SND_HIFIER is not set
# CONFIG_SND_ICE1712 is not set
# CONFIG_SND_ICE1724 is not set
CONFIG_SND_INTEL8X0=y
# CONFIG_SND_INTEL8X0M is not set
# CONFIG_SND_KORG1212 is not set
# CONFIG_SND_MAESTRO3 is not set
# CONFIG_SND_MIXART is not set
# CONFIG_SND_NM256 is not set
# CONFIG_SND_PCXHR is not set
# CONFIG_SND_RIPTIDE is not set
# CONFIG_SND_RME32 is not set
# CONFIG_SND_RME96 is not set
# CONFIG_SND_RME9652 is not set
# CONFIG_SND_SIS7019 is not set
# CONFIG_SND_SONICVIBES is not set
# CONFIG_SND_TRIDENT is not set
# CONFIG_SND_VIA82XX is not set
# CONFIG_SND_VIA82XX_MODEM is not set
# CONFIG_SND_VIRTUOSO is not set
# CONFIG_SND_VX222 is not set
# CONFIG_SND_YMFPCI is not set
# CONFIG_SND_AC97_POWER_SAVE is not set
#
# USB devices
#
# CONFIG_SND_USB_AUDIO is not set
# CONFIG_SND_USB_USX2Y is not set
# CONFIG_SND_USB_CAIAQ is not set
#
# System on Chip audio support
#
# CONFIG_SND_SOC is not set
#
# SoC Audio support for SuperH
#
#
# ALSA SoC audio for Freescale SOCs
#
#
# Open Sound System
#
# CONFIG_SOUND_PRIME is not set
CONFIG_AC97_BUS=y
CONFIG_HID_SUPPORT=y
CONFIG_HID=y
# CONFIG_HID_DEBUG is not set
# CONFIG_HIDRAW is not set
#
# USB Input Devices
#
CONFIG_USB_HID=y
# CONFIG_USB_HIDINPUT_POWERBOOK is not set
# CONFIG_HID_FF is not set
# CONFIG_USB_HIDDEV is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB_ARCH_HAS_OHCI=y
CONFIG_USB_ARCH_HAS_EHCI=y
CONFIG_USB=y
# CONFIG_USB_DEBUG is not set
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set
#
# Miscellaneous USB options
#
CONFIG_USB_DEVICEFS=y
# CONFIG_USB_DEVICE_CLASS is not set
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_SUSPEND is not set
# CONFIG_USB_PERSIST is not set
# CONFIG_USB_OTG is not set
#
# USB Host Controller Drivers
#
CONFIG_USB_EHCI_HCD=y
# CONFIG_USB_EHCI_ROOT_HUB_TT is not set
# CONFIG_USB_EHCI_TT_NEWSCHED is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
CONFIG_USB_UHCI_HCD=y
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
CONFIG_USB_PRINTER=y
#
# NOTE: USB_STORAGE enables SCSI, and 'SCSI disk support'
#
#
# may also be needed; see USB_STORAGE Help for more information
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_DPCM is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_LIBUSUAL is not set
#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
CONFIG_USB_MON=y
#
# USB port drivers
#
# CONFIG_USB_USS720 is not set
CONFIG_USB_SERIAL=m
# CONFIG_USB_EZUSB is not set
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_AIRPRIME is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP2101 is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
CONFIG_USB_SERIAL_PL2303=m
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_DEBUG is not set
#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_AUERSWALD is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_BERRY_CHARGE is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
CONFIG_USB_CYTHERM=m
# CONFIG_USB_PHIDGET is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_GADGET is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_INFINIBAND is not set
# CONFIG_EDAC is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
#
# Conflicting RTC option has been selected, check GEN_RTC and RTC
#
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set
#
# SPI RTC drivers
#
#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_V3020 is not set
#
# on-CPU RTC drivers
#
# CONFIG_DMADEVICES is not set
CONFIG_AUXDISPLAY=y
# CONFIG_KS0108 is not set
#
# Userspace I/O
#
# CONFIG_UIO is not set
#
# Firmware Drivers
#
# CONFIG_EDD is not set
# CONFIG_DELL_RBU is not set
CONFIG_DCDBAS=m
CONFIG_DMIID=y
#
# File systems
#
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
# CONFIG_EXT2_FS_XIP is not set
CONFIG_EXT3_FS=y
CONFIG_EXT3_FS_XATTR=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
# CONFIG_EXT4DEV_FS is not set
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_FS_POSIX_ACL is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_OCFS2_FS is not set
CONFIG_DNOTIFY=y
CONFIG_INOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS_FS is not set
CONFIG_AUTOFS4_FS=y
CONFIG_FUSE_FS=y
#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=y
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
CONFIG_UDF_FS=y
CONFIG_UDF_NLS=y
#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set
#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
# CONFIG_CONFIGFS_FS is not set
#
# Miscellaneous filesystems
#
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_CRAMFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
# CONFIG_NFS_V3 is not set
# CONFIG_NFS_V4 is not set
# CONFIG_NFS_DIRECTIO is not set
CONFIG_NFSD=y
# CONFIG_NFSD_V3 is not set
CONFIG_NFSD_TCP=y
CONFIG_LOCKD=y
CONFIG_EXPORTFS=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
# CONFIG_SUNRPC_BIND34 is not set
# CONFIG_RPCSEC_GSS_KRB5 is not set
# CONFIG_RPCSEC_GSS_SPKM3 is not set
# CONFIG_SMB_FS is not set
# CONFIG_CIFS is not set
# CONFIG_NCP_FS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
# CONFIG_NLS_CODEPAGE_850 is not set
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_UTF8 is not set
# CONFIG_DLM is not set
#
# Kernel hacking
#
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_PRINTK_TIME=y
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_MAGIC_SYSRQ=y
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_KERNEL is not set
# CONFIG_SLUB_STATS is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
# CONFIG_LATENCYTOP is not set
# CONFIG_PROVIDE_OHCI1394_DMA_INIT is not set
CONFIG_SAMPLES=y
CONFIG_SAMPLE_MARKERS=m
# CONFIG_SAMPLE_KOBJECT is not set
CONFIG_EARLY_PRINTK=y
CONFIG_X86_FIND_SMP_CONFIG=y
CONFIG_X86_MPPARSE=y
# CONFIG_DOUBLEFAULT is not set
CONFIG_IO_DELAY_TYPE_0X80=0
CONFIG_IO_DELAY_TYPE_0XED=1
CONFIG_IO_DELAY_TYPE_UDELAY=2
CONFIG_IO_DELAY_TYPE_NONE=3
# CONFIG_IO_DELAY_0X80 is not set
CONFIG_IO_DELAY_0XED=y
# CONFIG_IO_DELAY_UDELAY is not set
# CONFIG_IO_DELAY_NONE is not set
CONFIG_DEFAULT_IO_DELAY_TYPE=1
#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITY_FILE_CAPABILITIES is not set
CONFIG_CRYPTO=y
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_BLKCIPHER=y
# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_MANAGER=y
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_NULL is not set
# CONFIG_CRYPTO_MD4 is not set
# CONFIG_CRYPTO_MD5 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_WP512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_ECB=y
CONFIG_CRYPTO_CBC=y
CONFIG_CRYPTO_PCBC=y
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_XTS is not set
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_DES is not set
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_TWOFISH is not set
# CONFIG_CRYPTO_TWOFISH_586 is not set
# CONFIG_CRYPTO_SERPENT is not set
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_586 is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
# CONFIG_CRYPTO_TEA is not set
CONFIG_CRYPTO_ARC4=y
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SALSA20_586 is not set
# CONFIG_CRYPTO_DEFLATE is not set
CONFIG_CRYPTO_MICHAEL_MIC=y
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_TEST is not set
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_LZO is not set
CONFIG_CRYPTO_HW=y
# CONFIG_CRYPTO_DEV_PADLOCK is not set
CONFIG_CRYPTO_DEV_GEODE=y
# CONFIG_CRYPTO_DEV_HIFN_795X is not set
CONFIG_HAVE_KVM=y
CONFIG_VIRTUALIZATION=y
# CONFIG_KVM is not set
# CONFIG_LGUEST is not set
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_BALLOON is not set
#
# Library routines
#
CONFIG_BITREVERSE=y
# CONFIG_CRC_CCITT is not set
# CONFIG_CRC16 is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=m
CONFIG_AUDIT_GENERIC=y
CONFIG_PLIST=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> * Christoph Lameter ([email protected]) wrote:
> > On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> >
> > > In short, the we also use the versioning to check for change of slab.
Then we do not need the page->end field anymore right? I will try
to rediff your patch against current slab-mm and see how we can proceed
from there.
* Christoph Lameter ([email protected]) wrote:
> On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
>
> > * Christoph Lameter ([email protected]) wrote:
> > > On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> > >
> > > > In short, the we also use the versioning to check for change of slab.
>
> Then we do not need the page->end field anymore right? I will try
> to rediff your patch against current slab-mm and see how we can proceed
> from there.
I guess you could replace page->end with the (expensive)
page_address(page) + 1 in new_slab.
You would also have to change slab_address() to use
page_address(page). Since this is used by check_valid_pointer, I am not
sure it's a good idea to use this slow operation there.
Or maybe you have a different alternative in mind ?
Mathieu
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
* Christoph Lameter ([email protected]) wrote:
> On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
>
> > * Christoph Lameter ([email protected]) wrote:
> > > On Thu, 28 Feb 2008, Mathieu Desnoyers wrote:
> > >
> > > > In short, the we also use the versioning to check for change of slab.
>
> Then we do not need the page->end field anymore right? I will try
> to rediff your patch against current slab-mm and see how we can proceed
> from there.
Slub Freeoffset check overflow
Check for overflow of the freeoffset version number.
I just thought adding this check in CONFIG_SLUB_DEBUG makes sense. It's
really unlikely that enough interrupt handlers will nest over the slub
fast path, and each of them do about a million alloc/free on 32 bits or
a huge amount of alloc/free on 64 bits, but just in case, it seems good
to warn if we detect we are half-way to a version overflow.
Signed-off-by: Mathieu Desnoyers <[email protected]>
---
mm/slub.c | 32 ++++++++++++++++++++++++++------
1 file changed, 26 insertions(+), 6 deletions(-)
Index: linux-2.6-lttng/mm/slub.c
===================================================================
--- linux-2.6-lttng.orig/mm/slub.c 2008-02-29 08:05:01.000000000 -0500
+++ linux-2.6-lttng/mm/slub.c 2008-02-29 08:16:13.000000000 -0500
@@ -1660,7 +1660,7 @@ static __always_inline void *slab_alloc(
*/
#ifdef SLUB_FASTPATH
- unsigned long freeoffset, newoffset;
+ unsigned long freeoffset, newoffset, resoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
do {
@@ -1682,8 +1682,18 @@ static __always_inline void *slab_alloc(
newoffset = freeoffset;
newoffset &= ~c->off_mask;
newoffset |= (unsigned long)object[c->offset] & c->off_mask;
- } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
- != freeoffset);
+ resoffset = cmpxchg_local(&c->freeoffset, freeoffset,
+ newoffset);
+#ifdef CONFIG_SLUB_DEBUG
+ /*
+ * Just to be paranoid : warn if we detect that enough
+ * allocations nested on top of us to get the counter to go
+ * half-way to overflow. That would be insane to do that much
+ * allocations in interrupt handers, but check it anyway.
+ */
+ WARN_ON(resoffset - freeoffset > -1UL >> 1);
+#endif
+ } while (resoffset != freeoffset);
#else
unsigned long flags;
@@ -1822,7 +1832,7 @@ static __always_inline void slab_free(st
struct kmem_cache_cpu *c;
#ifdef SLUB_FASTPATH
- unsigned long freeoffset, newoffset;
+ unsigned long freeoffset, newoffset, resoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
debug_check_no_locks_freed(object, s->objsize);
@@ -1850,8 +1860,18 @@ static __always_inline void slab_free(st
newoffset = freeoffset + c->off_mask + 1;
newoffset &= ~c->off_mask;
newoffset |= (unsigned long)object & c->off_mask;
- } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
- != freeoffset);
+ resoffset = cmpxchg_local(&c->freeoffset, freeoffset,
+ newoffset);
+#ifdef CONFIG_SLUB_DEBUG
+ /*
+ * Just to be paranoid : warn if we detect that enough
+ * allocations nested on top of us to get the counter to go
+ * half-way to overflow. That would be insane to do that much
+ * allocations in interrupt handers, but check it anyway.
+ */
+ WARN_ON(resoffset - freeoffset > -1UL >> 1);
+#endif
+ } while (resoffset != freeoffset);
#else
unsigned long flags;
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
On Fri, 29 Feb 2008, Mathieu Desnoyers wrote:
> > Then we do not need the page->end field anymore right? I will try
> > to rediff your patch against current slab-mm and see how we can proceed
> > from there.
>
> I guess you could replace page->end with the (expensive)
> page_address(page) + 1 in new_slab.
>
> You would also have to change slab_address() to use
> page_address(page). Since this is used by check_valid_pointer, I am not
> sure it's a good idea to use this slow operation there.
>
> Or maybe you have a different alternative in mind ?
page->end was introduced to have a unique pointer for each slab. The
counter that you introduces can take over that role. So we could use a
NULL pointer again as the end of the objects? Or some constant?
I am going to revert the change that introduced page->end for 2.6.25 since
it seems that the new fastpath does not need this. It was specific to the
old fastpath.
On Sat, 16 Feb 2008 11:14:46 +0530 Kamalesh Babulal
<[email protected]> wrote:
> > The 2.6.25-rc2 kernel oopses while running dbench on ext3 filesystem
> > mounted with mount -o data=writeback,nobh option on the x86_64 box
> >
> > BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
> > IP: [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
> > PGD 1f6860067 PUD 1f5d64067 PMD 0
> > Oops: 0000 [1] SMP
> > CPU 3
> > Modules linked in:
> > Pid: 4271, comm: dbench Not tainted 2.6.25-rc2-autotest #1
> > RIP: 0010:[<ffffffff80274972>] [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
> > RSP: 0000:ffff8101fb041dc8 EFLAGS: 00010246
> > RAX: 0000000000000000 RBX: ffff810180033c00 RCX: ffffffff8027b269
> > RDX: 0000000000000000 RSI: 00000000000080d0 RDI: ffffffff80632d70
> > RBP: 00000000000080d0 R08: 0000000000000001 R09: 0000000000000000
> > R10: ffff8101feb36e50 R11: 0000000000000190 R12: 0000000000000001
> > R13: 0000000000000000 R14: ffff8101f8f38000 R15: 00000000ffffff9c
> > FS: 0000000000000000(0000) GS:ffff8101fff0f000(0063) knlGS:00000000f7e41460
> > CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
> > CR2: 0000000000000000 CR3: 00000001f5620000 CR4: 00000000000006e0
> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> > Process dbench (pid: 4271, threadinfo ffff8101fb040000, task ffff8101fb180000)
> > Stack: 0000000000000001 ffff8101fb041ea8 0000000000000001 ffffffff8027b269
> > ffff8101fb041ea8 ffffffff80281fe8 0000000000000001 0000000000000000
> > ffff8101fb041ea8 00000000ffffff9c 000000000000000b 0000000000000001
> > Call Trace:
> > [<ffffffff8027b269>] get_empty_filp+0x55/0xf9
> > [<ffffffff80281fe8>] __path_lookup_intent_open+0x22/0x8f
> > [<ffffffff80282853>] open_namei+0x86/0x5a7
> > [<ffffffff8027d019>] vfs_stat_fd+0x3c/0x4a
> > [<ffffffff80279ab1>] do_filp_open+0x1c/0x3d
> > [<ffffffff80279c2c>] get_unused_fd_flags+0x79/0x111
> > [<ffffffff80279dce>] do_sys_open+0x46/0xca
> > [<ffffffff80221c82>] ia32_sysret+0x0/0xa
On Mon, Feb 18, 2008 at 2:59 PM, Andrew Morton
<[email protected]> wrote:
> Looks to me like we broke slab. Christoph is offline until the 27th..
This is probably fixed by:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=00e962c5408b9f2d0bebd2308673fe982cb9a5fe
As this is on the regression list, Kamalesh, can you please confirm
it's fixed now?
Pekka
Pekka Enberg wrote:
> On Sat, 16 Feb 2008 11:14:46 +0530 Kamalesh Babulal
> <[email protected]> wrote:
>> > The 2.6.25-rc2 kernel oopses while running dbench on ext3 filesystem
>> > mounted with mount -o data=writeback,nobh option on the x86_64 box
>> >
>> > BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
>> > IP: [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
>> > PGD 1f6860067 PUD 1f5d64067 PMD 0
>> > Oops: 0000 [1] SMP
>> > CPU 3
>> > Modules linked in:
>> > Pid: 4271, comm: dbench Not tainted 2.6.25-rc2-autotest #1
>> > RIP: 0010:[<ffffffff80274972>] [<ffffffff80274972>] kmem_cache_alloc+0x3a/0x6c
>> > RSP: 0000:ffff8101fb041dc8 EFLAGS: 00010246
>> > RAX: 0000000000000000 RBX: ffff810180033c00 RCX: ffffffff8027b269
>> > RDX: 0000000000000000 RSI: 00000000000080d0 RDI: ffffffff80632d70
>> > RBP: 00000000000080d0 R08: 0000000000000001 R09: 0000000000000000
>> > R10: ffff8101feb36e50 R11: 0000000000000190 R12: 0000000000000001
>> > R13: 0000000000000000 R14: ffff8101f8f38000 R15: 00000000ffffff9c
>> > FS: 0000000000000000(0000) GS:ffff8101fff0f000(0063) knlGS:00000000f7e41460
>> > CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033
>> > CR2: 0000000000000000 CR3: 00000001f5620000 CR4: 00000000000006e0
>> > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
>> > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
>> > Process dbench (pid: 4271, threadinfo ffff8101fb040000, task ffff8101fb180000)
>> > Stack: 0000000000000001 ffff8101fb041ea8 0000000000000001 ffffffff8027b269
>> > ffff8101fb041ea8 ffffffff80281fe8 0000000000000001 0000000000000000
>> > ffff8101fb041ea8 00000000ffffff9c 000000000000000b 0000000000000001
>> > Call Trace:
>> > [<ffffffff8027b269>] get_empty_filp+0x55/0xf9
>> > [<ffffffff80281fe8>] __path_lookup_intent_open+0x22/0x8f
>> > [<ffffffff80282853>] open_namei+0x86/0x5a7
>> > [<ffffffff8027d019>] vfs_stat_fd+0x3c/0x4a
>> > [<ffffffff80279ab1>] do_filp_open+0x1c/0x3d
>> > [<ffffffff80279c2c>] get_unused_fd_flags+0x79/0x111
>> > [<ffffffff80279dce>] do_sys_open+0x46/0xca
>> > [<ffffffff80221c82>] ia32_sysret+0x0/0xa
>
> On Mon, Feb 18, 2008 at 2:59 PM, Andrew Morton
> <[email protected]> wrote:
>> Looks to me like we broke slab. Christoph is offline until the 27th..
>
> This is probably fixed by:
>
> http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=00e962c5408b9f2d0bebd2308673fe982cb9a5fe
>
> As this is on the regression list, Kamalesh, can you please confirm
> it's fixed now?
>
> Pekka
Thanks, I tested the 2.6.25-rc3-git4 kernel and the oops is not reproducible. This commit seems to fix the kernel oops.
--
Thanks & Regards,
Kamalesh Babulal,
Linux Technology Center,
IBM, ISTL.
Check for overflow of the freeoffset version number.
I just thought adding this check in CONFIG_SLUB_DEBUG makes sense. It's
really unlikely that enough interrupt handlers will nest over the slub
fast path, and each of them do about a million alloc/free on 32 bits or
a huge amount of alloc/free on 64 bits, but just in case, it seems good
to warn if we detect we are half-way to a version overflow.
Changelog :
- Mask out the LSB because of alloc fast path. See comment in source.
Signed-off-by: Mathieu Desnoyers <[email protected]>
---
mm/slub.c | 40 ++++++++++++++++++++++++++++++++++------
1 file changed, 34 insertions(+), 6 deletions(-)
Index: linux-2.6-lttng/mm/slub.c
===================================================================
--- linux-2.6-lttng.orig/mm/slub.c 2008-03-04 00:59:01.000000000 -0500
+++ linux-2.6-lttng/mm/slub.c 2008-03-04 01:03:44.000000000 -0500
@@ -1660,7 +1660,7 @@ static __always_inline void *slab_alloc(
*/
#ifdef SLUB_FASTPATH
- unsigned long freeoffset, newoffset;
+ unsigned long freeoffset, newoffset, resoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
do {
@@ -1682,8 +1682,22 @@ static __always_inline void *slab_alloc(
newoffset = freeoffset;
newoffset &= ~c->off_mask;
newoffset |= (unsigned long)object[c->offset] & c->off_mask;
- } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
- != freeoffset);
+ resoffset = cmpxchg_local(&c->freeoffset, freeoffset,
+ newoffset);
+#ifdef CONFIG_SLUB_DEBUG
+ /*
+ * Just to be paranoid : warn if we detect that enough free or
+ * slow paths nested on top of us to get the counter to go
+ * half-way to overflow. That would be insane to do that much
+ * allocations/free in interrupt handers, but check it anyway.
+ * Mask out the LSBs because alloc fast path does not increment
+ * the sequence number, which may cause the overall values to go
+ * backward.
+ */
+ WARN_ON((resoffset & ~c->off_mask)
+ - (freeoffset & ~c->off_mask) > -1UL >> 1);
+#endif
+ } while (resoffset != freeoffset);
#else
unsigned long flags;
@@ -1822,7 +1836,7 @@ static __always_inline void slab_free(st
struct kmem_cache_cpu *c;
#ifdef SLUB_FASTPATH
- unsigned long freeoffset, newoffset;
+ unsigned long freeoffset, newoffset, resoffset;
c = get_cpu_slab(s, raw_smp_processor_id());
debug_check_no_locks_freed(object, s->objsize);
@@ -1850,8 +1864,22 @@ static __always_inline void slab_free(st
newoffset = freeoffset + c->off_mask + 1;
newoffset &= ~c->off_mask;
newoffset |= (unsigned long)object & c->off_mask;
- } while (cmpxchg_local(&c->freeoffset, freeoffset, newoffset)
- != freeoffset);
+ resoffset = cmpxchg_local(&c->freeoffset, freeoffset,
+ newoffset);
+#ifdef CONFIG_SLUB_DEBUG
+ /*
+ * Just to be paranoid : warn if we detect that enough free or
+ * slow paths nested on top of us to get the counter to go
+ * half-way to overflow. That would be insane to do that much
+ * allocations/free in interrupt handers, but check it anyway.
+ * Mask out the LSBs because alloc fast path does not increment
+ * the sequence number, which may cause the overall values to go
+ * backward.
+ */
+ WARN_ON((resoffset & ~c->off_mask)
+ - (freeoffset & ~c->off_mask) > -1UL >> 1);
+#endif
+ } while (resoffset != freeoffset);
#else
unsigned long flags;
--
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68
Could you rediff your work against the slab-mm branch of my VM tree on
kernel.org?