Oops in kswapd, 2.4.19 kernel and before

Hugo Mills (hugo-lkml@carfax.org.uk)
Mon, 28 Oct 2002 10:24:39 +0000

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Hi,

This is the third time I've tried to report this problem, with no
response so far. One last try. If you're not interested, please tell
me and I won't bother you any more...

I'm getting regular oopsen in kswapd on my 2.4.19 kernel. They
generally appear to happen while running Amanda (a tape backup
utility) -- although I've not identified exactly which component of
Amanda triggers it. The machine is lightly stressed with regard to
memory usage, although I suspect much of it is (currently) swapped out
(I'm running postgres and apache, but they don't get much use at the
moment):

hrm@vlad:hrm $ free
total used free shared buffers cached
Mem: 127240 125264 1976 0 2576 35020
-/+ buffers/cache: 87668 39572
Swap: 262132 53240 208892

After the oops, my kswapd is zombied:

hrm@vlad:hrm $ ps ax | grep kswapd
5 ? Z 0:11 [kswapd <defunct>]

although the machine does appear to continue to function without
problems. I have seen precisely similar effects on most of the
previous 2.4.x kernels.

Decoded oopsen are below (they _are_ decoded with the right system
maps, despite ksymoops's concerns). If there's anything else that's
needed in order to track this down, please let me know.

Thanks,
Hugo.

-----

ksymoops 2.4.6 on i586 2.4.19. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19/ (default)
-m /boot/System.map-2.4.19 (default)

Warning: You did not tell me where to find symbol information. I will
assume that the log matches the kernel and modules that are running
right now and I'll use the default options above for symbol resolution.
If the current kernel and/or modules do not match the log, you can get
more accurate output by telling me the kernel version and where to find
map, modules, ksyms etc. ksymoops -h explains the options.

Oct 24 06:31:14 vlad kernel: c014248a
Oct 24 06:31:14 vlad kernel: Oops: 0000
Oct 24 06:31:14 vlad kernel: CPU: 0
Oct 24 06:31:14 vlad kernel: EIP: 0010:[iput+46/432] Not tainted
Oct 24 06:31:14 vlad kernel: EFLAGS: 00010206
Oct 24 06:31:14 vlad kernel: eax: 00000000 ebx: c67d8800 ecx: c67d8810 edx: c67d8810
Oct 24 06:31:14 vlad kernel: esi: 476f7200 edi: 00000000 ebp: c7f9ff3c esp: c7f9ff30
Oct 24 06:31:14 vlad kernel: ds: 0018 es: 0018 ss: 0018
Oct 24 06:31:14 vlad kernel: Process kswapd (pid: 5, stackpage=c7f9f000)
Oct 24 06:31:14 vlad kernel: Stack: c088ef78 c088ef60 c67d8800 c7f9ff54 c01405e6 c67d8800 00000011 000001d0
Oct 24 06:31:14 vlad kernel: 00000011 c7f9ff60 c01408bc 0000172d c7f9ff84 c012b0b1 00000002 000001d0
Oct 24 06:31:14 vlad kernel: 00000002 000001d0 c0287d74 00000002 c0287d74 c7f9ff9c c012b101 00000011
Oct 24 06:31:14 vlad kernel: Call Trace: [prune_dcache+198/316] [shrink_dcache_memory+28/52] [shrink_caches+105/132] [try_to_free_pages+53/88] [kswapd_balance_pgdat+76/160]
Oct 24 06:31:14 vlad kernel: Code: 8b 46 20 85 c0 74 02 89 c7 85 ff 74 0d 8b 47 10 85 c0 74 06
Using defaults from ksymoops -t elf32-i386 -a i386

>>ebx; c67d8800 <_end+64d5fc8/852f828>
>>ecx; c67d8810 <_end+64d5fd8/852f828>
>>edx; c67d8810 <_end+64d5fd8/852f828>
>>ebp; c7f9ff3c <_end+7c9d704/852f828>
>>esp; c7f9ff30 <_end+7c9d6f8/852f828>

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 46 20 mov 0x20(%esi),%eax
Code; 00000003 Before first symbol
3: 85 c0 test %eax,%eax
Code; 00000005 Before first symbol
5: 74 02 je 9 <_EIP+0x9>
Code; 00000007 Before first symbol
7: 89 c7 mov %eax,%edi
Code; 00000009 Before first symbol
9: 85 ff test %edi,%edi
Code; 0000000b Before first symbol
b: 74 0d je 1a <_EIP+0x1a>
Code; 0000000d Before first symbol
d: 8b 47 10 mov 0x10(%edi),%eax
Code; 00000010 Before first symbol
10: 85 c0 test %eax,%eax
Code; 00000012 Before first symbol
12: 74 06 je 1a <_EIP+0x1a>

1 warning issued. Results may not be reliable.

-----

ksymoops 2.4.6 on i586 2.4.19. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19/ (default)
-m /boot/System.map-2.4.19 (default)

Oct 27 01:46:00 vlad kernel: Unable to handle kernel paging request at virtual address 47804220
Oct 27 01:46:00 vlad kernel: c014248a
Oct 27 01:46:00 vlad kernel: *pde = 00000000
Oct 27 01:46:00 vlad kernel: Oops: 0000
Oct 27 01:46:00 vlad kernel: CPU: 0
Oct 27 01:46:00 vlad kernel: EIP: 0010:[iput+46/432] Not tainted
Oct 27 01:46:00 vlad kernel: EFLAGS: 00010206
Oct 27 01:46:00 vlad kernel: eax: 00000000 ebx: c67c8800 ecx: c67c8810 edx: c67c8810
Oct 27 01:46:00 vlad kernel: esi: 47804200 edi: 00000000 ebp: c7f9ff3c esp: c7f9ff30
Oct 27 01:46:00 vlad kernel: ds: 0018 es: 0018 ss: 0018
Oct 27 01:46:00 vlad kernel: Process kswapd (pid: 5, stackpage=c7f9f000)
Oct 27 01:46:00 vlad kernel: Stack: c6a93d38 c6a93d20 c67c8800 c7f9ff54 c01405e6c67c8800 00000005 000001d0
Oct 27 01:46:00 vlad kernel: 00000020 c7f9ff60 c01408bc 000009e1 c7f9ff84c012b0b1 00000006 000001d0
Oct 27 01:46:00 vlad kernel: 00000006 000001d0 c0287d74 00000006 c0287d74c7f9ff9c c012b101 00000020
Oct 27 01:46:00 vlad kernel: Call Trace: [prune_dcache+198/316] [shrink_dcache_memory+28/52] [shrink_caches+105/132] [try_to_free_pages+53/88] [kswapd_balance_pgdat+76/160]
Oct 27 01:46:00 vlad kernel: Code: 8b 46 20 85 c0 74 02 89 c7 85 ff 74 0d 8b 47 10 85 c0 74 06
Using defaults from ksymoops -t elf32-i386 -a i386

>>ebx; c67c8800 <_end+64c5fc8/852f828>
>>ecx; c67c8810 <_end+64c5fd8/852f828>
>>edx; c67c8810 <_end+64c5fd8/852f828>
>>ebp; c7f9ff3c <_end+7c9d704/852f828>
>>esp; c7f9ff30 <_end+7c9d6f8/852f828>

1 warning issued. Results may not be reliable.

-----

ksymoops 2.4.6 on i586 2.4.19. Options used
-V (default)
-k /proc/ksyms (default)
-l /proc/modules (default)
-o /lib/modules/2.4.19/ (default)
-m /boot/System.map-2.4.19 (default)

Oct 28 08:04:49 vlad kernel: Unable to handle kernel paging request at virtual address 47880220
Oct 28 08:04:49 vlad kernel: c0141c6a
Oct 28 08:04:49 vlad kernel: *pde = 00000000
Oct 28 08:04:49 vlad kernel: Oops: 0000
Oct 28 08:04:49 vlad kernel: CPU: 0
Oct 28 08:04:49 vlad kernel: EIP: 0010:[clear_inode+86/168] Not tainted
Oct 28 08:04:49 vlad kernel: EFLAGS: 00010206
Oct 28 08:04:49 vlad kernel: eax: 47880200 ebx: c67c8800 ecx: c67c8808 edx: c67c8818
Oct 28 08:04:49 vlad kernel: esi: c7f9ff44 edi: c73e8a28 ebp: c7f9ff14 esp: c7f9ff10
Oct 28 08:04:49 vlad kernel: ds: 0018 es: 0018 ss: 0018
Oct 28 08:04:49 vlad kernel: Process kswapd (pid: 5, stackpage=c7f9f000)
Oct 28 08:04:49 vlad kernel: Stack: c67c8800 c7f9ff28 c0141cff c67c8800 c5829648 c5829640 c7f9ff4c c0141f24
Oct 28 08:04:49 vlad kernel: c7f9ff44 0000000c 000001d0 00000020 000005df c02d3428 c36d5de8 c7f9ff58
Oct 28 08:04:49 vlad kernel: c0141f5c 00000000 c7f9ff84 c012b0bb 00000006 000001d0 00000006 000001d0
Oct 28 08:04:49 vlad kernel: Call Trace: [dispose_list+67/96] [prune_icache+164/192] [shrink_icache_memory+28/52] [shrink_caches+115/132] [try_to_free_pages+53/88]
Oct 28 08:04:49 vlad kernel: Code: 8b 40 20 85 c0 74 0f 8b 40 30 85 c0 74 08 53 ff d0 83 c4 04
Using defaults from ksymoops -t elf32-i386 -a i386

>>ebx; c67c8800 <_end+64c5fc8/852f828>
>>ecx; c67c8808 <_end+64c5fd0/852f828>
>>edx; c67c8818 <_end+64c5fe0/852f828>
>>esi; c7f9ff44 <_end+7c9d70c/852f828>
>>edi; c73e8a28 <_end+70e61f0/852f828>
>>ebp; c7f9ff14 <_end+7c9d6dc/852f828>
>>esp; c7f9ff10 <_end+7c9d6d8/852f828>

Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 8b 40 20 mov 0x20(%eax),%eax
Code; 00000003 Before first symbol
3: 85 c0 test %eax,%eax
Code; 00000005 Before first symbol
5: 74 0f je 16 <_EIP+0x16>
Code; 00000007 Before first symbol
7: 8b 40 30 mov 0x30(%eax),%eax
Code; 0000000a Before first symbol
a: 85 c0 test %eax,%eax
Code; 0000000c Before first symbol
c: 74 08 je 16 <_EIP+0x16>
Code; 0000000e Before first symbol
e: 53 push %ebx
Code; 0000000f Before first symbol
f: ff d0 call *%eax
Code; 00000011 Before first symbol
11: 83 c4 04 add $0x4,%esp

1 warning issued. Results may not be reliable.

-- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP: 1024D/1C335860 from wwwkeys.eu.pgp.net or www.carfax.nildram.co.uk --- Anyone who claims their cryptographic protocol is secure is --- either a genius or a fool. Given the genius/fool ratio for our species, the odds aren't good.

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Next message: Jamie Lokier: "Re: nanosecond file timestamp resolution in filesystems, GNU make, etc."
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