I had a machine lock up on me last night - it would not respond to the
keyboard, and although it would allow a password prompt from an ssh
session, it would hang at login.  I went looking through syslog, and
I've found some unsettling entries.

Here are the entries a bit before the lock-up:

Sep 16 14:02:01 atlas kernel: invalid operand: 0000
Sep 16 14:02:01 atlas kernel: CPU:    0
Sep 16 14:02:01 atlas kernel: EIP:    0010:[__free_pages_ok+40/500]    Tainted: P 
Sep 16 14:02:01 atlas kernel: EFLAGS: 00010282
Sep 16 14:02:01 atlas kernel: eax: c114a8dc   ebx: c11fa180   ecx: c11fa180   edx: 
c02546e0
Sep 16 14:02:01 atlas kernel: esi: c11fa180   edi: 00000000   ebp: 00000070   esp: 
c1217f28
Sep 16 14:02:01 atlas kernel: ds: 0018   es: 0018   ss: 0018
Sep 16 14:02:01 atlas kernel: Process kswapd (pid: 4, stackpage=c1217000)
Sep 16 14:02:01 atlas kernel: Stack: c216f7e0 c11fa180 0000000d 00000070 c11fa180 
000001d0 c216f7e0 c11fa180 
Sep 16 14:02:01 atlas kernel:        c0126762 c01274d7 c012679b 00000020 000001d0 
00000020 00000006 00000006 
Sep 16 14:02:01 atlas kernel:        c1216000 000004cf 000001d0 c0254808 c0126996 
00000006 0000001a 00000006 
Sep 16 14:02:01 atlas kernel: Call Trace: [shrink_cache+458/732] [__free_pages+27/28] 
[shrink_cache+515/732] [shrink_caches+86/124] [try_to_fre
e_pages+55/88] 
Sep 16 14:02:01 atlas kernel:    [kswapd_balance_pgdat+67/140] [kswapd_balance+18/40] 
[kswapd+153/188] [kernel_thread+40/56] 
Sep 16 14:02:01 atlas kernel: 
Sep 16 14:02:01 atlas kernel: Code: 0f 0b 89 d8 2b 05 cc 8e 2a c0 c1 f8 06 3b 05 c0 8e 
2a c0 72 
Sep 16 14:08:01 atlas kernel:  invalid operand: 0000
Sep 16 14:08:01 atlas kernel: CPU:    0
Sep 16 14:08:01 atlas kernel: EIP:    0010:[__free_pages_ok+40/500]    Tainted: P 
Sep 16 14:08:01 atlas kernel: EFLAGS: 00010282
Sep 16 14:08:01 atlas kernel: eax: c116795c   ebx: c11df040   ecx: c11df040   edx: 
c02546e0
Sep 16 14:08:01 atlas kernel: esi: c11df040   edi: 00000000   ebp: 00000086   esp: 
c6987e2c
Sep 16 14:08:01 atlas kernel: ds: 0018   es: 0018   ss: 0018
Sep 16 14:08:01 atlas kernel: Process cron (pid: 438, stackpage=c6987000)
Sep 16 14:08:01 atlas kernel: Stack: c216f600 c11df040 00000020 00000086 c11df040 
000001f0 c216f600 c11df040 
Sep 16 14:08:01 atlas kernel:        c0126762 c01274d7 c012679b 00000020 000001f0 
00000020 00000006 00000006 
Sep 16 14:08:01 atlas kernel:        c6986000 0000053e 000001f0 c0254808 c0126996 
00000006 00000018 00000006 
Sep 16 14:08:01 atlas kernel: Call Trace: [shrink_cache+458/732] [__free_pages+27/28] 
[shrink_cache+515/732] [shrink_caches+86/124] [try_to_fre
e_pages+55/88] 
Sep 16 14:08:01 atlas kernel:    [balance_classzone+78/360] [__alloc_pages+262/356] 
[_alloc_pages+22/24] [__get_free_pages+10/24] [pte_alloc+60
/152] [copy_page_range+221/408] 
Sep 16 14:08:01 atlas kernel:    [copy_mm+546/700] [do_fork+1014/1648] 
[process_timeout+0/72] [sys_time+20/84] [sys_fork+20/28] [system_call+51
/56] 
Sep 16 14:08:01 atlas kernel: 
Sep 16 14:08:01 atlas kernel: Code: 0f 0b 89 d8 2b 05 cc 8e 2a c0 c1 f8 06 3b 05 c0 8e 
2a c0 72

Scrolling up a bit more, I've found more odd log entries.  From a bit of
googling, it seems they are related to ReiserFS.

Sep 11 18:20:13 atlas kernel: Directory sread (sector 0x1d) failed
Sep 11 18:20:13 atlas kernel: attempt to access beyond end of device
Sep 11 18:20:13 atlas kernel: 02:00: rw=0, want=15, limit=4

This goes on for several entries.

I am simply curious if anyone has seen this behavior and what
solutions/explanations you have found.

Thanks,
Rob


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