Hi David and everybody else on lkml,
The following oops is more-or-less-deterministically reproducible
on my dual-processor SPARCstation 10 with 160MB RAM. It tends to send
the system down under heavy load caused by either sendmail/procmail
or apache. I first came across the bug at around 2.4.17, though it's
probably been lurking in the kernel much longer. I've gone through
quite a bit of trouble attempting to get the oops barf at me in 2.2.x
in case it's my hw config that's behind the whole problem, but I haven't
run into any breakdowns, 2.2.21-rc2 included.
I'm willing to provide as much support as I can to anyone who finds
the issue important enough to try to fix it -- for me, at present,
it efficiently renders the 2.4 branch unusable?on my 24-7 server
(which is rather inconvenient as I have trouble finding an alternative
to iptables).
After the oops occurs, the machine is in a state where:
o All memory is exhausted, yet no processes get killed
(I haven't got a clue as to where all the memory goes).
o System load is constantly rising.
o Most processes are impossible to run (sh won't fork them),
but somehow I've always been able to ssh in and issue a reboot
after a while of trying.
o The system can only be rebooted via /sbin/reboot -f -n (god
bless ext3!), as it appears that sync() won't go through.
Enclosed please find the oops decode from ksymoops 2.4.5 as well
as an inline copy of the corresponding 2.4.18-rc4 '.config'. Should
you need more information, please don't hesitate to ask for it.
bye,
Tomas (I'm not subscribed to the list, make sure to CC me!)
pub 1024d/8e316a84 2002-01-29 tomas szepe <[email protected]>
openpgp f/print 2955 2eea c4b8 b09e 7ae1 4d5d 68e3 d606 8e31 6a84
ksymoops 2.4.5 on sparc 2.4.18-rc4. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.18-rc4/ (default)
-m /boot/System.map (specified)
Mar 26 15:26:48 louise kernel: Run out of nocached RAM!
Mar 26 15:26:48 louise kernel: kernel BUG at srmmu.c:397!
Mar 26 15:26:48 louise kernel: Unable to handle kernel NULL pointer dereference<1>tsk->{mm,active_mm}->context = 000098b9
Mar 26 15:26:48 louise kernel: tsk->{mm,active_mm}->pgd = fc0e9400
Mar 26 15:26:48 louise kernel: \|/ ____ \|/
Mar 26 15:26:49 louise kernel: "@'/ ,. \`@"
Mar 26 15:26:49 louise kernel: /_| \__/ |_\
Mar 26 15:26:50 louise kernel: \__U_/
Mar 26 15:26:50 louise kernel: procmail(6642): Oops
Mar 26 15:26:50 louise kernel: PSR: 408000c6 PC: f00241dc NPC: f00241e0 Y: 00000000 Not tainted
Using defaults from ksymoops -t elf32-sparc -a sparc
Mar 26 15:26:51 louise kernel: g0: 87f20019 g1: 40800fe4 g2: 00000001 g3: 40400fe5 g4: f002b9b8 g5: 53545556 g6: f8708000 g7: 00000100
Mar 26 15:26:52 louise kernel: o0: 0000001b o1: 404000e6 o2: f018c800 o3: f018c800 o4: f018c930 o5: f01e5c00 sp: f8709d48 o7: f00241d4
Mar 26 15:26:52 louise kernel: l0: 00000000 l1: f01c2e20 l2: f004c54c l3: 00000000 l4: 00000020 l5: 5f646c00 l6: f8708000 l7: 5002a6a8
Mar 26 15:26:52 louise kernel: i0: f87200a0 i1: 501e46c4 i2: 009187ee i3: f041f760 i4: 00000000 i5: 00000008 fp: f8709db0 i7: f003f75c
Mar 26 15:26:52 louise kernel: Caller[f003f75c]
Mar 26 15:26:52 louise kernel: Caller[f003f588]
Mar 26 15:26:53 louise kernel: Caller[f0022428]
Mar 26 15:26:53 louise kernel: Caller[f001505c]
Mar 26 15:26:53 louise kernel: Caller[5011f9b8]
Mar 26 15:26:53 louise kernel: Instruction DUMP: 92126170 40001d46 9410218d <c0202000> 81c7e008 91e82000 9de3bf98 90100018 7fffff53
>>PC; f00241dc <srmmu_pte_alloc_one+1c/28> <=====
>>g0; 87f20019 Before first symbol
>>g1; 40800fe4 Before first symbol
>>g3; 40400fe5 Before first symbol
>>g4; f002b9b8 <release_console_sem+44/10c>
>>g5; 53545556 Before first symbol
>>g6; f8708000 <end+84efd60/e0f0d60>
>>o1; 404000e6 Before first symbol
>>o2; f018c800 <abi_table+70/134>
>>o3; f018c800 <abi_table+70/134>
>>o4; f018c930 <console_printk+0/10>
>>o5; f01e5c00 <uidhash_table+16c/400>
>>sp; f8709d48 <end+84f1aa8/e0f0d60>
>>o7; f00241d4 <srmmu_pte_alloc_one+14/28>
>>l1; f01c2e20 <pagemap_lru_lock+0/20>
>>l2; f004c54c <_alloc_pages+4/2c>
>>l5; 5f646c00 Before first symbol
>>l6; f8708000 <end+84efd60/e0f0d60>
>>l7; 5002a6a8 Before first symbol
>>i0; f87200a0 <end+8507e00/e0f0d60>
>>i1; 501e46c4 Before first symbol
>>i2; 009187ee Before first symbol
>>i3; f041f760 <end+2074c0/e0f0d60>
>>fp; f8709db0 <end+84f1b10/e0f0d60>
>>i7; f003f75c <pte_alloc+44/b0>
Trace; f003f75c <pte_alloc+44/b0>
Trace; f003f588 <handle_mm_fault+70/184>
Trace; f0022428 <do_sparc_fault+200/450>
Trace; f001505c <srmmu_fault+58/68>
Trace; 5011f9b8 Before first symbol
Code; f00241d0 <srmmu_pte_alloc_one+10/28>
00000000 <_PC>:
Code; f00241d0 <srmmu_pte_alloc_one+10/28>
0: 92 12 61 70 or %o1, 0x170, %o1
Code; f00241d4 <srmmu_pte_alloc_one+14/28>
4: 40 00 1d 46 call 751c <_PC+0x751c> f002b6ec <printk+0/1e8>
Code; f00241d8 <srmmu_pte_alloc_one+18/28>
8: 94 10 21 8d mov 0x18d, %o2
Code; f00241dc <srmmu_pte_alloc_one+1c/28> <=====
c: c0 20 20 00 clr [ %g0 ] <=====
Code; f00241e0 <srmmu_pte_alloc_one+20/28>
10: 81 c7 e0 08 ret
Code; f00241e4 <srmmu_pte_alloc_one+24/28>
14: 91 e8 20 00 restore %g0, 0, %o0
Code; f00241e8 <srmmu_free_pte_fast+0/18>
18: 9d e3 bf 98 save %sp, -104, %sp
Code; f00241ec <srmmu_free_pte_fast+4/18>
1c: 90 10 00 18 mov %i0, %o0
Code; f00241f0 <srmmu_free_pte_fast+8/18>
20: 7f ff ff 53 call fffffd6c <_PC+0xfffffd6c> f0023f3c <srmmu_free_nocache+0/a4>
Code; f00241f4 <srmmu_free_pte_fast+c/18>
24: 00 00 00 00 unimp 0
/usr/src/linux/.config:
#
# Automatically generated make config: don't edit
#
CONFIG_UID16=y
CONFIG_HIGHMEM=y
#
# Code maturity level options
#
CONFIG_EXPERIMENTAL=y
#
# Loadable module support
#
CONFIG_MODULES=y
CONFIG_MODVERSIONS=y
CONFIG_KMOD=y
#
# General setup
#
CONFIG_VT=y
CONFIG_VT_CONSOLE=y
CONFIG_SMP=y
CONFIG_SPARC32=y
# CONFIG_ISA is not set
# CONFIG_EISA is not set
# CONFIG_MCA is not set
# CONFIG_PCMCIA is not set
CONFIG_SBUS=y
CONFIG_SBUSCHAR=y
CONFIG_BUSMOUSE=y
CONFIG_SUN_MOUSE=y
CONFIG_SERIAL=y
CONFIG_SUN_SERIAL=y
CONFIG_SERIAL_CONSOLE=y
CONFIG_SUN_KEYBOARD=y
CONFIG_SUN_CONSOLE=y
CONFIG_SUN_AUXIO=y
CONFIG_SUN_IO=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
# CONFIG_RWSEM_XCHGADD_ALGORITHM is not set
# CONFIG_SUN4 is not set
# CONFIG_PCI is not set
CONFIG_SUN_OPENPROMFS=m
CONFIG_NET=y
CONFIG_SYSVIPC=y
CONFIG_BSD_PROCESS_ACCT=y
CONFIG_SYSCTL=y
CONFIG_KCORE_ELF=y
CONFIG_BINFMT_AOUT=m
CONFIG_BINFMT_ELF=y
CONFIG_BINFMT_MISC=m
# CONFIG_SUNOS_EMUL is not set
#
# Parallel port support
#
CONFIG_PARPORT=m
# CONFIG_PARPORT_PC is not set
# CONFIG_PARPORT_AMIGA is not set
# CONFIG_PARPORT_MFC3 is not set
# CONFIG_PARPORT_ATARI is not set
# CONFIG_PARPORT_GSC is not set
CONFIG_PARPORT_SUNBPP=m
# CONFIG_PARPORT_OTHER is not set
CONFIG_PARPORT_1284=y
CONFIG_PRINTER=m
#
# Console drivers
#
CONFIG_PROM_CONSOLE=y
#
# Frame-buffer support
#
CONFIG_FB=y
CONFIG_DUMMY_CONSOLE=y
# CONFIG_FB_CYBER2000 is not set
CONFIG_FB_SBUS=y
CONFIG_FB_CGSIX=y
# CONFIG_FB_BWTWO is not set
# CONFIG_FB_CGTHREE is not set
# CONFIG_FB_TCX is not set
# CONFIG_FB_CGFOURTEEN is not set
# CONFIG_FB_P9100 is not set
# CONFIG_FB_LEO is not set
# CONFIG_FB_VIRTUAL is not set
# CONFIG_FBCON_ADVANCED is not set
# CONFIG_FBCON_FONTWIDTH8_ONLY is not set
# CONFIG_FONT_SUN8x16 is not set
CONFIG_FONT_SUN12x22=y
CONFIG_FBCON_FONTS=y
# CONFIG_FONT_8x8 is not set
CONFIG_FONT_8x16=y
# CONFIG_FONT_6x11 is not set
# CONFIG_FONT_PEARL_8x8 is not set
# CONFIG_FONT_ACORN_8x8 is not set
#
# Memory Technology Devices (MTD)
#
# CONFIG_MTD is not set
#
# Misc Linux/SPARC drivers
#
CONFIG_SUN_OPENPROMIO=m
CONFIG_SUN_MOSTEK_RTC=y
# CONFIG_SUN_BPP is not set
# CONFIG_SUN_VIDEOPIX is not set
# CONFIG_SUN_AURORA is not set
# CONFIG_TADPOLE_TS102_UCTRL is not set
# CONFIG_SUN_JSFLASH is not set
#
# Linux/SPARC audio subsystem (EXPERIMENTAL)
#
# CONFIG_SPARCAUDIO is not set
# CONFIG_SPARCAUDIO_AMD7930 is not set
# CONFIG_SPARCAUDIO_DBRI is not set
# CONFIG_SPARCAUDIO_CS4231 is not set
# CONFIG_SPARCAUDIO_DUMMY is not set
#
# Block devices
#
CONFIG_BLK_DEV_FD=y
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_NBD=m
#
# Multi-device support (RAID and LVM)
#
# CONFIG_MD is not set
# CONFIG_BLK_DEV_MD is not set
# CONFIG_MD_LINEAR is not set
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
# CONFIG_MD_RAID5 is not set
# CONFIG_MD_MULTIPATH is not set
# CONFIG_BLK_DEV_LVM is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_BLK_DEV_INITRD is not set
#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_MMAP is not set
CONFIG_NETLINK_DEV=y
CONFIG_NETFILTER=y
# CONFIG_NETFILTER_DEBUG is not set
# CONFIG_FILTER is not set
CONFIG_UNIX=y
CONFIG_INET=y
# CONFIG_IP_MULTICAST is not set
# CONFIG_IP_ADVANCED_ROUTER is not set
# CONFIG_IP_PNP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE is not set
# CONFIG_ARPD is not set
# CONFIG_INET_ECN is not set
# CONFIG_SYN_COOKIES is not set
#
# IP: Netfilter Configuration
#
CONFIG_IP_NF_CONNTRACK=m
CONFIG_IP_NF_FTP=m
CONFIG_IP_NF_IRC=m
# CONFIG_IP_NF_QUEUE is not set
CONFIG_IP_NF_IPTABLES=m
# CONFIG_IP_NF_MATCH_LIMIT is not set
# CONFIG_IP_NF_MATCH_MAC is not set
# CONFIG_IP_NF_MATCH_MARK is not set
# CONFIG_IP_NF_MATCH_MULTIPORT is not set
# CONFIG_IP_NF_MATCH_TOS is not set
# CONFIG_IP_NF_MATCH_AH_ESP is not set
# CONFIG_IP_NF_MATCH_LENGTH is not set
# CONFIG_IP_NF_MATCH_TTL is not set
# CONFIG_IP_NF_MATCH_TCPMSS is not set
# CONFIG_IP_NF_MATCH_STATE is not set
# CONFIG_IP_NF_MATCH_UNCLEAN is not set
# CONFIG_IP_NF_MATCH_OWNER is not set
CONFIG_IP_NF_FILTER=m
CONFIG_IP_NF_TARGET_REJECT=m
# CONFIG_IP_NF_TARGET_MIRROR is not set
CONFIG_IP_NF_NAT=m
CONFIG_IP_NF_NAT_NEEDED=y
CONFIG_IP_NF_TARGET_MASQUERADE=m
CONFIG_IP_NF_TARGET_REDIRECT=m
# CONFIG_IP_NF_NAT_SNMP_BASIC is not set
CONFIG_IP_NF_NAT_IRC=m
CONFIG_IP_NF_NAT_FTP=m
# CONFIG_IP_NF_MANGLE is not set
# CONFIG_IP_NF_TARGET_LOG is not set
# CONFIG_IP_NF_TARGET_ULOG is not set
# CONFIG_IP_NF_TARGET_TCPMSS is not set
# CONFIG_IP_NF_COMPAT_IPCHAINS is not set
# CONFIG_IP_NF_COMPAT_IPFWADM is not set
# CONFIG_IPV6 is not set
# CONFIG_KHTTPD is not set
# CONFIG_ATM is not set
# CONFIG_VLAN_8021Q is not set
#
#
#
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_DECNET is not set
# CONFIG_BRIDGE is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_LLC is not set
# CONFIG_NET_DIVERT is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_NET_FASTROUTE is not set
# CONFIG_NET_HW_FLOWCONTROL is not set
#
# QoS and/or fair queueing
#
# CONFIG_NET_SCHED is not set
# CONFIG_IDE is not set
# CONFIG_BLK_DEV_IDE_MODES is not set
# CONFIG_BLK_DEV_HD is not set
#
# ISDN subsystem
#
# CONFIG_ISDN is not set
#
# SCSI support
#
CONFIG_SCSI=y
#
# SCSI support type (disk, tape, CDrom)
#
CONFIG_BLK_DEV_SD=y
CONFIG_SD_EXTRA_DEVS=40
CONFIG_CHR_DEV_ST=m
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=m
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_SR_EXTRA_DEVS=2
CONFIG_CHR_DEV_SG=m
#
# 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
#
# SCSI low-level drivers
#
CONFIG_SCSI_SUNESP=y
# CONFIG_SCSI_QLOGICPTI is not set
#
# Fibre Channel support
#
# CONFIG_FC4 is not set
# CONFIG_FC4_SOC is not set
# CONFIG_FC4_SOCAL is not set
# CONFIG_SCSI_PLUTO is not set
# CONFIG_SCSI_FCAL is not set
#
# Network device support
#
CONFIG_NETDEVICES=y
CONFIG_DUMMY=m
# CONFIG_BONDING is not set
CONFIG_TUN=m
CONFIG_PPP=m
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
# CONFIG_PPP_BSDCOMP is not set
CONFIG_SLIP=m
CONFIG_SLIP_COMPRESSED=y
CONFIG_SLIP_SMART=y
# CONFIG_SLIP_MODE_SLIP6 is not set
CONFIG_SUNLANCE=m
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNBMAC is not set
# CONFIG_SUNQE is not set
# CONFIG_MYRI_SBUS is not set
#
# Unix98 PTY support
#
CONFIG_UNIX98_PTYS=y
CONFIG_UNIX98_PTY_COUNT=512
#
# File systems
#
CONFIG_QUOTA=y
# CONFIG_AUTOFS_FS is not set
# CONFIG_AUTOFS4_FS is not set
CONFIG_REISERFS_FS=m
# CONFIG_REISERFS_CHECK is not set
# CONFIG_REISERFS_PROC_INFO is not set
# CONFIG_ADFS_FS is not set
# CONFIG_ADFS_FS_RW is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_BFS_FS is not set
CONFIG_EXT3_FS=y
CONFIG_JBD=y
# CONFIG_JBD_DEBUG is not set
CONFIG_FAT_FS=m
CONFIG_MSDOS_FS=m
CONFIG_UMSDOS_FS=m
CONFIG_VFAT_FS=m
# CONFIG_EFS_FS is not set
# CONFIG_JFFS_FS is not set
# CONFIG_JFFS2_FS is not set
# CONFIG_CRAMFS is not set
CONFIG_TMPFS=y
# CONFIG_RAMFS is not set
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
# CONFIG_ZISOFS is not set
CONFIG_MINIX_FS=m
# CONFIG_VXFS_FS is not set
# CONFIG_NTFS_FS is not set
# CONFIG_NTFS_RW is not set
# CONFIG_HPFS_FS is not set
CONFIG_PROC_FS=y
# CONFIG_DEVFS_FS is not set
# CONFIG_DEVFS_MOUNT is not set
# CONFIG_DEVFS_DEBUG is not set
CONFIG_DEVPTS_FS=y
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX4FS_RW is not set
CONFIG_ROMFS_FS=m
CONFIG_EXT2_FS=m
# CONFIG_SYSV_FS is not set
# CONFIG_UDF_FS is not set
# CONFIG_UDF_RW is not set
# CONFIG_UFS_FS is not set
# CONFIG_UFS_FS_WRITE is not set
#
# Network File Systems
#
# CONFIG_CODA_FS is not set
# CONFIG_INTERMEZZO_FS is not set
CONFIG_NFS_FS=m
CONFIG_NFS_V3=y
# CONFIG_ROOT_NFS is not set
CONFIG_NFSD=m
CONFIG_NFSD_V3=y
CONFIG_SUNRPC=m
CONFIG_LOCKD=m
CONFIG_LOCKD_V4=y
CONFIG_SMB_FS=m
# CONFIG_SMB_NLS_DEFAULT is not set
# CONFIG_NCP_FS is not set
# CONFIG_NCPFS_PACKET_SIGNING is not set
# CONFIG_NCPFS_IOCTL_LOCKING is not set
# CONFIG_NCPFS_STRONG is not set
# CONFIG_NCPFS_NFS_NS is not set
# CONFIG_NCPFS_OS2_NS is not set
# CONFIG_NCPFS_SMALLDOS is not set
# CONFIG_NCPFS_NLS is not set
# CONFIG_NCPFS_EXTRAS is not set
# CONFIG_ZISOFS_FS is not set
# CONFIG_ZLIB_FS_INFLATE 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 is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
CONFIG_SUN_PARTITION=y
CONFIG_SMB_NLS=y
CONFIG_NLS=y
#
# Native Language Support
#
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
# 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=m
# 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=m
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ISO8859_1=m
CONFIG_NLS_ISO8859_2=m
# 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
#
# Bluetooth support
#
# CONFIG_BLUEZ is not set
#
# Watchdog
#
# CONFIG_SOFT_WATCHDOG is not set
#
# Kernel hacking
#
# CONFIG_MAGIC_SYSRQ is not set
Please do not CC: me on sparc32 bugs, I do not maintain nor work on
that port any more.
On Tue, 26 Mar 2002, tomas szepe wrote:
> Hi David and everybody else on lkml,
>
>
> The following oops is more-or-less-deterministically reproducible
> on my dual-processor SPARCstation 10 with 160MB RAM. It tends to send
> the system down under heavy load caused by either sendmail/procmail
> or apache. I first came across the bug at around 2.4.17, though it's
> probably been lurking in the kernel much longer. I've gone through
> quite a bit of trouble attempting to get the oops barf at me in 2.2.x
> in case it's my hw config that's behind the whole problem, but I haven't
> run into any breakdowns, 2.2.21-rc2 included.
Assuming that you can handle your load, at least briefly, with a single
CPU, have you tried booting with 'nosmp' on this machine? A serious test
would build without SMP to get the whole locking stuff to go away, but
this is quick and dirty.
I'm convinced that there are evils still lurking in SMP after all these
years.
--
bill davidsen <[email protected]>
CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
Hi,
> > The following oops is more-or-less-deterministically reproducible
> > on my dual-processor SPARCstation 10 with 160MB RAM. It tends to send
> > the system down under heavy load caused by either sendmail/procmail
> > or apache. I first came across the bug at around 2.4.17, though it's
> > probably been lurking in the kernel much longer. I've gone through
> > quite a bit of trouble attempting to get the oops barf at me in 2.2.x
> > in case it's my hw config that's behind the whole problem, but I haven't
> > run into any breakdowns, 2.2.21-rc2 included.
> Assuming that you can handle your load, at least briefly, with a single
> CPU, have you tried booting with 'nosmp' on this machine? A serious test
> would build without SMP to get the whole locking stuff to go away, but
> this is quick and dirty.
Right, good point. I'll boot the machine nosmp and try to reproduce the
oops over the weekend.
> I'm convinced that there are evils still lurking in SMP after all these
> years.
trouble is, I have no idea whether the bug is present in earlier
2.4 kernels as well without me noticing, or if it's a relatively
new thing (Sure I could check, but it's not like I can reproduce
the oops in under an hour or so of trying: that's what I meant by
"more-or-less-deterministically" :D).
T.
pub 1024d/8e316a84 2002-01-29 tomas szepe <[email protected]>
openpgp f/print 2955 2eea c4b8 b09e 7ae1 4d5d 68e3 d606 8e31 6a84
hi,
> > The following oops is more-or-less-deterministically reproducible
> > on my dual-processor SPARCstation 10 with 160MB RAM. It tends to send
> > the system down under heavy load caused by either sendmail/procmail
> > or apache. I first came across the bug at around 2.4.17, though it's
> > probably been lurking in the kernel much longer. I've gone through
> > quite a bit of trouble attempting to get the oops barf at me in 2.2.x
> > in case it's my hw config that's behind the whole problem, but I haven't
> > run into any breakdowns, 2.2.21-rc2 included.
>
> Assuming that you can handle your load, at least briefly, with a single
> CPU, have you tried booting with 'nosmp' on this machine? A serious test
> would build without SMP to get the whole locking stuff to go away, but
> this is quick and dirty.
>
> I'm convinced that there are evils still lurking in SMP after all these
> years.
Bad news, everyone. I'm definitely able to reproduce the very same fatal oops
on a UP kernel as well. Couldn't find a SPARC32 equivalent of i386's "nosmp,"
so I was forced to recompile the kernel (2.4.18-rc4) with CONFIG_SMP undefined
and do a "serious test" anyway.
Running something like the following kills the machine flat:
#!/bin/sh
i=0; while [ ! "$i" = "500" ]; do
/bin/echo testmail.| /bin/mail -s test autoreply@localhost
i=$(/usr/bin/expr $i + 1)
done
For a ksymoops decode of the oops in question and more, please look up my
former post in this thread.
Looks like it's back to 2.2 for all SPARC/Linux users for the time being.
-Tomas Szepe
pub 1024d/8e316a84 2002-01-29 tomas szepe <[email protected]>
openpgp f/print 2955 2eea c4b8 b09e 7ae1 4d5d 68e3 d606 8e31 6a84