Hi,
We are seeing this problem while unmounting file systems. It happens
once in a while.
I am able to grab the trace and core from linux-2.6.18-1.8.el5, but I
have observed the same problem with linux-2.6.20.1 kernel.
Has this problem fixed in recent kernel?
BUG: Dentry f7498f70{i=12803e,n=client72} still in use (1) [unmount of nfs 0:18]
------------[ cut here ]------------
kernel BUG at fs/dcache.c:615!
invalid opcode: 0000 [#1]
SMP
last sysfs file: /block/ram0/range
Modules linked in: nfs fscache nfsd exportfs lockd nfs_acl
ipmi_msghandler kazprocs(U) sunrpc ipv6
dm_mirror dm_mod video sbs i2c_ec button battery asus_acpi ac lp
floppy snd_intel8x0 snd_ac97_cod
ec snd_ac97_bus snd_seq_dummy snd_seq_oss snd_seq_midi_event snd_seq
snd_seq_device snd_pcm_oss sn
d_mixer_oss snd_pcm snd_timer snd soundcore snd_page_alloc ide_cd e100
parport_pc i2c_i801 mii par
port pcspkr i2c_core cdrom serio_raw ata_piix libata sd_mod scsi_mod
ext3 jbd ehci_hcd ohci_hcd uh
ci_hcd
CPU: 0
EIP: 0060:[<c047e49f>] Not tainted VLI
EFLAGS: 00010246 (2.6.18-8.el5 #1)
EIP is at shrink_dcache_for_umount_subtree+0x133/0x1c1
eax: 00000054 ebx: f7498f70 ecx: c0621b24 edx: de121ee8
esi: 00000001 edi: f7835740 ebp: 0012803e esp: de121ee4
ds: 007b es: 007b ss: 0068
Process umount.nfs (pid: 29559, ti=de121000 task=ebbe5000 task.ti=de121000)
Stack: c0621b24 f7498f70 0012803e f7498fd4 00000001 f8d55765 f7835740 f7835600
f8d67980 00000000 00000000 c047ec5d f7835600 c0470153 00000018 f8d67960
c0470248 e1b0d380 f8d3a175 f7835600 c04702d7 f74629c0 f7835600 c0483165
Call Trace:
[<c047ec5d>] shrink_dcache_for_umount+0x2e/0x3a
[<c0470153>] generic_shutdown_super+0x16/0xd5
[<c0470248>] kill_anon_super+0x9/0x2f
[<f8d3a175>] nfs_kill_super+0xc/0x14 [nfs]
[<c04702d7>] deactivate_super+0x52/0x65
[<c0483165>] sys_umount+0x1f0/0x218
[<c059c9eb>] release_sock+0xc/0x91
[<c05fd48f>] do_page_fault+0x20a/0x4b8
[<c05fd4f9>] do_page_fault+0x274/0x4b8
[<c0483198>] sys_oldumount+0xb/0xe
[<c0403eff>] syscall_call+0x7/0xb
=======================
Code: ed 8b 53 0c 8b 33 8b 4b 24 8d b8 40 01 00 00 8b 40 1c 85 d2 8b
00 74 03 8b 6a 20 57 50 56 51
55 53 68 24 1b 62 c0 e8 c5 5c fa ff <0f> 0b 67 02 18 1b 62 c0 83 c4
1c 8b 73 18 39 de 75 04 31 f6
eb
EIP: [<c047e49f>] shrink_dcache_for_umount_subtree+0x133/0x1c1 SS:ESP
0068:de121ee4
Thanks
--Chakri
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The patches do not help. The system still paniced in the same place.
Still trying to correlate the problem & fix to specific patch.
Regards
--Chakri
On 8/5/07, Chakri n <[email protected]> wrote:
> Hi Malte,
>
> Thanks for the information.
>
> Based on your suggestion I tried the following two patches on top of
> 2.6.18-1.8.el5 NFS code. I had to keep the changes minimum to fix this
> crash in our release.
>
> http://linux-nfs.org/Linux-2.6.x/2.6.20-rc7/linux-2.6.20-007-fix_readdir_=
negative_dentry.dif
> http://linux-nfs.org/Linux-2.6.x/2.6.20-rc7/linux-2.6.20-008-fix_readdir_=
positive_dentry.dif
>
> The systems are running for the past 7 hours with out any issues.
> Hopefully this fixes it.
>
> Regards
> --Chakri
>
> On 8/4/07, Malte Schr=F6der <[email protected]> wrote:
> > On Thu, 2 Aug 2007 14:27:04 -0700
> > "Chakri n" <[email protected]> wrote:
> >
> > > Hi,
> > >
> > > We are seeing this problem while unmounting file systems. It happens
> > > once in a while.
> > > I am able to grab the trace and core from linux-2.6.18-1.8.el5, but I
> > > have observed the same problem with linux-2.6.20.1 kernel.
> > >
> > > Has this problem fixed in recent kernel?
> > >
> >
> > I had those too ... but I haven't seen one in a while.
> > I currently run 2.6.22 + cfs-v19 + the Patch from
> > http://linux-nfs.org/Linux-2.6.x/2.6.22/linux-2.6.22-NFS_ALL.dif
> >
> > --
> > ---------------------------------------
> > Malte Schr=F6der
> > [email protected]
> > ICQ# 68121508
> > ---------------------------------------
> >
> >
> >
>
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On Thu, 2 Aug 2007 14:27:04 -0700
"Chakri n" <[email protected]> wrote:
> Hi,
>
> We are seeing this problem while unmounting file systems. It happens
> once in a while.
> I am able to grab the trace and core from linux-2.6.18-1.8.el5, but I
> have observed the same problem with linux-2.6.20.1 kernel.
>
> Has this problem fixed in recent kernel?
>
I had those too ... but I haven't seen one in a while.
I currently run 2.6.22 + cfs-v19 + the Patch from
http://linux-nfs.org/Linux-2.6.x/2.6.22/linux-2.6.22-NFS_ALL.dif
--
---------------------------------------
Malte Schröder
[email protected]
ICQ# 68121508
---------------------------------------
Hi Malte,
Thanks for the information.
Based on your suggestion I tried the following two patches on top of
2.6.18-1.8.el5 NFS code. I had to keep the changes minimum to fix this
crash in our release.
http://linux-nfs.org/Linux-2.6.x/2.6.20-rc7/linux-2.6.20-007-fix_readdir_ne=
gative_dentry.dif
http://linux-nfs.org/Linux-2.6.x/2.6.20-rc7/linux-2.6.20-008-fix_readdir_po=
sitive_dentry.dif
The systems are running for the past 7 hours with out any issues.
Hopefully this fixes it.
Regards
--Chakri
On 8/4/07, Malte Schr=F6der <[email protected]> wrote:
> On Thu, 2 Aug 2007 14:27:04 -0700
> "Chakri n" <[email protected]> wrote:
>
> > Hi,
> >
> > We are seeing this problem while unmounting file systems. It happens
> > once in a while.
> > I am able to grab the trace and core from linux-2.6.18-1.8.el5, but I
> > have observed the same problem with linux-2.6.20.1 kernel.
> >
> > Has this problem fixed in recent kernel?
> >
>
> I had those too ... but I haven't seen one in a while.
> I currently run 2.6.22 + cfs-v19 + the Patch from
> http://linux-nfs.org/Linux-2.6.x/2.6.22/linux-2.6.22-NFS_ALL.dif
>
> --
> ---------------------------------------
> Malte Schr=F6der
> [email protected]
> ICQ# 68121508
> ---------------------------------------
>
>
>
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