Message-ID: <46E53EE8.8010602@linux.vnet.ibm.com>
Date:	Mon, 10 Sep 2007 18:26:08 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
CC:	linux-kernel@...r.kernel.org, bfields@...ldses.org, neilb@...e.de,
	nfs@...ts.sourceforge.net
Subject: Re: [BUG] 2.6.23-rc5 kernel BUG at fs/nfs/nfs4xdr.c:945

Michal Piotrowski wrote:
> Hi,
>
> On 07/09/2007, Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:
>   
>> Sep  7 11:42:49 p55lp2 kernel: kernel BUG at fs/nfs/nfs4xdr.c:945!
>> Sep  7 11:42:49 p55lp2 kernel: Oops: Exception in kernel mode, sig: 5 [#1]
>> Sep  7 11:42:49 p55lp2 kernel: SMP NR_CPUS=128 NUMA pSeries
>> Sep  7 11:42:49 p55lp2 kernel: Modules linked in: nfs lockd nfs_acl
>> sunrpc ipv6 loop dm_mod ibmveth sg ibmvscsic sd_mod scsi_mod
>> Sep  7 11:42:49 p55lp2 kernel: NIP: d000000000378044 LR:
>> d000000000378034 CTR: 80000000001c5840
>> Sep  7 11:42:49 p55lp2 kernel: REGS: c0000000d971b050 TRAP: 0700   Not
>> tainted  (2.6.23-rc5-ppc64)
>> Sep  7 11:42:49 p55lp2 kernel: MSR: 8000000000029032 <EE,ME,IR,DR>  CR:
>> 28000444  XER: 00000014
>> Sep  7 11:42:49 p55lp2 kernel: TASK = c000000002787740[11508] 'fsstress'
>> THREAD: c0000000d9718000 CPU: 1
>> Sep  7 11:42:49 p55lp2 kernel: GPR00: 0000000000000001 c0000000d971b2d0
>> d0000000003bd648 0000000000000037
>> Sep  7 11:42:49 p55lp2 kernel: GPR04: 0000000000000000 0000000000000000
>> 0000000000000000 0000000000000000
>> Sep  7 11:42:49 p55lp2 kernel: GPR08: 0000000000000002 c000000000616538
>> c0000000ef7afb58 c000000000616540
>> Sep  7 11:42:49 p55lp2 kernel: GPR12: 0000000000004000 c0000000005e4a80
>> 0000000000000000 00000000200b2510
>> Sep  7 11:42:49 p55lp2 kernel: GPR16: 0000000020105550 00000000200b2534
>> 000000002008c15c 0000000000000001
>> Sep  7 11:42:49 p55lp2 kernel: GPR20: 0000000000000000 0000000000000001
>> fffffffffffff000 c0000000d971ba30
>> Sep  7 11:42:49 p55lp2 kernel: GPR24: d00000000034f524 c0000000dc4f8054
>> c0000000d971b7d0 c0000000d9d313f0
>> Sep  7 11:42:49 p55lp2 kernel: GPR28: 0000000000000276 0000000022000000
>> d0000000003b8d78 0000000000000000
>> Sep  7 11:42:49 p55lp2 kernel: NIP [d000000000378044]
>> .encode_lookup+0x6c/0xbc [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: LR [d000000000378034]
>> .encode_lookup+0x5c/0xbc [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: Call Trace:
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b2d0] [d000000000378034]
>> .encode_lookup+0x5c/0xbc [nfs] (unreliable)
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b370] [d000000000379f8c]
>> .nfs4_xdr_enc_lookup+0x78/0xbc [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b440] [d000000000314534]
>> .rpcauth_wrap_req+0xe4/0x124 [sunrpc]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b4f0] [d00000000030a790]
>> .call_transmit+0x218/0x2b8 [sunrpc]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b590] [d0000000003124d8]
>> .__rpc_execute+0xd4/0x368 [sunrpc]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b630] [d00000000030b114]
>> .rpc_do_run_task+0xc8/0x104 [sunrpc]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b6e0] [d00000000030b224]
>> .rpc_call_sync+0x2c/0x64 [sunrpc]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b760] [d00000000036ef04]
>> ._nfs4_proc_lookupfh+0xd4/0x124 [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b850] [d0000000003719a0]
>> ._nfs4_proc_lookup+0x80/0x21c [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b910] [d000000000371ba4]
>> .nfs4_proc_lookup+0x68/0xac [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971b9c0] [d000000000354bf4]
>> .nfs_lookup+0x158/0x334 [nfs]
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971bbc0] [c0000000000f3a28]
>> .lookup_hash+0xfc/0x140
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971bc60] [c0000000000f7b28]
>> .sys_renameat+0x164/0x228
>> Sep  7 11:42:49 p55lp2 kernel: [c0000000d971be30] [c000000000008534]
>> syscall_exit+0x0/0x40
>> Sep  7 11:42:49 p55lp2 kernel: Instruction dump:
>> Sep  7 11:42:49 p55lp2 kernel: e8410028 7fa4eb78 7c7f1b79 7fb80026
>> 40820014 e8be83a8 e87e8350 4800c5f9
>> Sep  7 11:42:49 p55lp2 kernel: e8410028 7fb80120 7c180026 54001ffe
>> <0b000000> 3800000f 7b850020 387f0008
>>     
>
> Is this a post 2.6.22 regression? Have you tried 2.6.23-rc5-git1?
> (There are a few nfs fixes)
>
> Regards,
> Michal
>   
When i tried with 2.6.23-rc5-git1, i dropped in xmon state with
following trace

cpu 0x1: Vector: 700 (Program Check) at [c0000000e28c30c0]
pc: d000000000846d74: .nfs4_xdr_enc_create+0x204/0x2b4 [nfs]
lr: d000000000846d68: .nfs4_xdr_enc_create+0x1f8/0x2b4 [nfs]
sp: c0000000e28c3340
msr: 8000000000029032
current = 0xc0000000e58a4790
paca = 0xc0000000005eaf00
pid = 3452, comm = fsstress
kernel BUG at fs/nfs/nfs4xdr.c:788!
1:mon> t
[c0000000e28c3410] d00000000019a2d4 .rpcauth_wrap_req+0xe4/0x124 [sunrpc]
[c0000000e28c34c0] d000000000190774 .call_transmit+0x218/0x2b8 [sunrpc]
[c0000000e28c3560] d000000000198308 .__rpc_execute+0xd4/0x34c [sunrpc]
[c0000000e28c3600] d0000000001910f8 .rpc_do_run_task+0xc8/0x104 [sunrpc]
[c0000000e28c36b0] d000000000191208 .rpc_call_sync+0x2c/0x64 [sunrpc]
[c0000000e28c3730] d00000000083bd68 .nfs4_proc_symlink+0x180/0x220 [nfs]
[c0000000e28c3ae0] d000000000822298 .nfs_symlink+0x1b8/0x344 [nfs]
[c0000000e28c3c60] c0000000000f5400 .vfs_symlink+0x144/0x1e8
[c0000000e28c3d00] c0000000000f8bf0 .sys_symlinkat+0xa8/0x110
[c0000000e28c3e30] c000000000008534 syscall_exit+0x0/0x40
--- Exception: c01 (System Call) at 000000000ff578c0
SP (ff9e59d0) is in userspace
1:mon>


and i am not sure of the post 2.6.22 regression.

Thanks & Regards,
Kamalesh Babulal.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

Powered by blists - more mailing lists