Re: NFS related oops

From: Maciej Soltysiak
Date: Thu Jun 14 2007 - 11:34:51 EST

Trond Myklebust pisze:
On Wed, 2007-06-13 at 14:00 +0200, Maciej Soltysiak wrote:

If anyone is interested I got this OOPS while running a torrent (btdownloadcurses)
application writing directly to a NAS mounted via nfs3.

The client machine is and it is mounted with options:

Hmm. The Oops says ''

Firstly, does that have any extra out-of-tree patches?
Secondly, is it reproducible with 2.6.21 or a more recent kernel?

Ah, yes, not and it does contain 2 extra things:
- Con Kolivas' -cks1 (server version)
- reiser4 code, one mounted filesystem.
After that, the application hung and i am unable to cd into the mounted nfs directory
nor unmount it (busy), nor kill the app (kill -9 fails, process in D state)

Best regards,

BUG: unable to handle kernel paging request at virtual address 5018f248
printing eip:
*pde = 00000000
Oops: 0002 [#1]
Modules linked in: binfmt_misc sit nfs lockd nfs_acl sunrpc w83627ehf i2c_isa i2c_viapro i2c_core via_agp agpgart rtc
CPU: 0
EIP: 0060:[<f0a93c94>] Not tainted VLI
EFLAGS: 00010206 ( #15)
EIP is at rpcauth_checkverf+0x34/0x70 [sunrpc]
eax: d2f4447c ebx: c655d584 ecx: 00000000 edx: f0aa9f60
esi: e91ea640 edi: d2f44474 ebp: ede2f228 esp: e64b5eec
ds: 007b es: 007b ss: 0068
Process rpciod/0 (pid: 1005, ti=e64b4000 task=efe95a90 task.ti=e64b4000)
Stack: 00000286 ede2f8a0 ede2f8a0 00000286 c655d584 121d0da3 00000820 f0a8d7fd
f0a93d60 f08bae07 00000286 c655d5cc 00000286 00000286 f08c0520 c655d584
00000000 c655d5ec f0a93260 f0a9306f efe95a90 ee2d5740 e092ffb0 c034e11c
Call Trace:
[<f0a8d7fd>] call_decode+0x27d/0x5e0 [sunrpc]
[<f0a93d60>] rpcauth_unbindcred+0x20/0x60 [sunrpc]
[<f08bae07>] nfs_readpage_result_full+0xf7/0x120 [nfs]
[<f08c0520>] nfs3_xdr_readres+0x0/0x160 [nfs]
[<f0a93260>] rpc_async_schedule+0x0/0x10 [sunrpc]
[<f0a9306f>] __rpc_execute+0x5f/0x250 [sunrpc]
[<c034e11c>] schedule+0x21c/0x450
[<c01283aa>] run_workqueue+0x7a/0x110
[<c0128a07>] worker_thread+0x137/0x160
[<c01176b0>] default_wake_function+0x0/0x10
[<c01288d0>] worker_thread+0x0/0x160
[<c012b329>] kthread+0xa9/0xe0
[<c012b280>] kthread+0x0/0xe0
[<c0103a97>] kernel_thread_helper+0x7/0x10
Code: 10 89 5c 24 10 89 c3 89 7c 24 18 89 d7 89 74 24 14 8b 70 28 75 1a 8b
4e 08 89 fa 89 d8 ff 51 18 8b 5c 24 10 83 74 24 14 8b 7c 24 <18> 83 c4 1c c3
89 74 24 0c 8b 40 10 8b 40 24 8b 40 10 8b 40 08 EIP: [<f0a93c94>]
rpcauth_checkverf+0x34/0x70 [sunrpc] SS:ESP 0068:e64b5eec

At a first guess, it looks as though something has scribbled over your
credential. Have you tried running this kernel with slab debugging

No, i will turn it on, though. The server crashes on heavy NFS traffic (eg. nightly rsync backup)
It crashed again today, but the oops did not get written to kern.log
Thanks for your reply and best regards,

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