Oh, I got the kernel log for the very first occurrence of this symptom,
this time with what-looks-like kernel symbols (BUG at 14:17:52):
- Thierry
Jan 29 14:06:04 host----name kernel: Adding 1542204k swap on /dev/sda7.
Priority:62 extents:1 across:1542204k
Jan 29 14:06:04 host----name kernel: NET: Registered protocol family 10
Jan 29 14:17:52 host----name kernel: RPC: Registered named UNIX socket
transport module.
Jan 29 14:17:52 host----name kernel: RPC: Registered udp transport module.
Jan 29 14:17:52 host----name kernel: RPC: Registered tcp transport module.
Jan 29 14:17:52 host----name kernel: RPC: Registered tcp NFSv4.1
backchannel transport module.
Jan 29 14:17:52 host----name kernel: Installing knfsd (copyright (C)
1996 okir@xxxxxxxxxxxx).
Jan 29 14:17:52 host----name kernel: BUG: unable to handle kernel paging
request at 01ffffff
Jan 29 14:17:52 host----name kernel: IP: [<cef30068>]
rpcauth_lookupcred+0x30/0x66 [sunrpc]
Jan 29 14:17:52 host----name kernel: *pde = 00000000
Jan 29 14:17:52 host----name kernel: Oops: 0002 [#1] SMP
Jan 29 14:17:52 host----name kernel: Modules linked in: nfsd exportfs
lockd sunrpc ipv6 dm_mod snd_via82xx snd_mpu401_uart snd_rawmidi
snd_ac97_codec ac97_bus snd_pcm snd_page_alloc 8250_pnp snd_timer snd
soundcore ehci_hcd uhci_hcd sr_mod usbcore usb_common cdrom floppy 8250
parport_pc serial_core parport via_rhine via_agp agpgart
Jan 29 14:17:52 host----name kernel:
Jan 29 14:17:52 host----name kernel: Pid: 6769, comm: rpc.nfsd Not
tainted 3.5.4 #3 PCCHIPS P25G/P4M800-8237
Jan 29 14:17:52 host----name kernel: EIP: 0060:[<cef30068>] EFLAGS:
00010246 CPU: 0
Jan 29 14:17:52 host----name kernel: EIP is at
rpcauth_lookupcred+0x30/0x66 [sunrpc]
Jan 29 14:17:52 host----name kernel: EAX: 01ffffff EBX: ccce3a80 ECX:
00000000 EDX: 00000000
Jan 29 14:17:53 host----name kernel: ESI: ccce3c00 EDI: cc261dc8 EBP:
cef3e204 ESP: cc261db4
Jan 29 14:17:53 host----name kernel: DS: 007b ES: 007b FS: 00d8 GS:
0033 SS: 0068
Jan 29 14:17:53 host----name kernel: CR0: 8005003b CR2: 01ffffff CR3:
0c258000 CR4: 00000790
Jan 29 14:17:53 host----name kernel: DR0: 00000000 DR1: 00000000 DR2:
00000000 DR3: 00000000
Jan 29 14:17:53 host----name kernel: DR6: ffff0ff0 DR7: 00000400
Jan 29 14:17:53 host----name kernel: Process rpc.nfsd (pid: 6769,
ti=cc260000 task=cdb95440 task.ti=cc260000)
Jan 29 14:17:53 host----name kernel: Stack:
Jan 29 14:17:53 host----name kernel: 00000000 00000000 00000000
00000000 00000000 ccce3a80 ccce3a80 00000000
Jan 29 14:17:53 host----name kernel: cdaeab00 cef301a6 cef2c068
ccce3a80 cef2c7f3 cdb7ba64 00000000 ccce3ab8
Jan 29 14:17:53 host----name kernel: ccce3a80 00000000 cdaaa000
cef2f5e7 ccce3ab8 c102c9af ccce3a80 cc261e2c
Jan 29 14:17:53 host----name kernel: Call Trace:
Jan 29 14:17:53 host----name kernel: [<cef301a6>] ?
rpcauth_refreshcred+0x5a/0x95 [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef2c068>] ?
xprt_release_xprt+0x31/0x3f [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef2c7f3>] ?
xprt_reserve+0x184/0x1ad [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef2f5e7>] ?
__rpc_execute+0x34/0x158 [sunrpc]
Jan 29 14:17:53 host----name kernel: [<c102c9af>] ? wake_up_bit+0xb/0x16
Jan 29 14:17:53 host----name kernel: [<cef2b2f8>] ?
rpc_run_task+0x57/0x5c [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef2b3d9>] ?
rpc_call_sync+0x39/0x54 [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef34b41>] ?
rpcb_register_call+0x11/0x20 [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef34edd>] ?
rpcb_v4_register+0x82/0xed [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef31431>] ?
svc_unregister.isra.15+0x3c/0x98 [sunrpc]
Jan 29 14:17:53 host----name kernel: [<cef91c7d>] ?
write_filehandle+0x14b/0x14b [nfsd]
Jan 29 14:17:53 host----name kernel: [<cef314bc>] ?
svc_rpcb_setup+0x1f/0x25 [sunrpc]
Jan 29 14:17:54 host----name kernel: [<cef91302>] ?
nfsd_create_serv+0xba/0x10a [nfsd]
Jan 29 14:17:54 host----name kernel: [<c10eb6a0>] ?
simple_strtoull+0x23/0x3f
Jan 29 14:17:54 host----name kernel: [<cef91d2d>] ?
export_features_show+0x18/0x18 [nfsd]
Jan 29 14:17:54 host----name kernel: [<cef91dc6>] ?
write_ports+0x99/0x2be [nfsd]
Jan 29 14:17:54 host----name kernel: [<c11499d8>] ?
get_random_bytes+0x12/0x15
Jan 29 14:17:54 host----name kernel: [<c11eecf3>] ?
_raw_write_lock_bh+0x9/0x1c
Jan 29 14:17:54 host----name kernel: [<c108d955>] ?
simple_transaction_get+0x66/0x80
Jan 29 14:17:54 host----name kernel: [<cef91d2d>] ?
export_features_show+0x18/0x18 [nfsd]
Jan 29 14:17:54 host----name kernel: [<cef91cb4>] ?
nfsctl_transaction_write+0x37/0x51 [nfsd]
Jan 29 14:17:54 host----name kernel: [<c1076e7c>] ? vfs_write+0x7b/0xf3
Jan 29 14:17:54 host----name kernel: [<c1077081>] ? sys_write+0x38/0x65
Jan 29 14:17:54 host----name kernel: [<c11ef6d0>] ?
sysenter_do_call+0x12/0x26
Jan 29 14:17:54 host----name kernel: Code: 00 57 89 c5 56 53 83 ec 14 64
a1 b8 45 31 c1 89 e7 8b b0 c4 01 00 00 31 c0 f3 ab 8b 46 1c 89 04 24 8b
46 20 89 44 24 04 8b 46 60 <3e> ff 00 8b 75 10 89 d1 89 e2 89 44 24 08
89 e8 ff 56 14 8b 54
Jan 29 14:17:54 host----name kernel: EIP: [<cef30068>]
rpcauth_lookupcred+0x30/0x66 [sunrpc] SS:ESP 0068:cc261db4
Jan 29 14:17:54 host----name kernel: CR2: 0000000001ffffff
Jan 29 14:17:54 host----name kernel: ---[ end trace 7dad9f92a03954c6 ]---
--- end of message ---
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