Re: kswapd OOPS under 2.4.19-pre8 (ext3, Reiserfs + (soft)raid0)

From: Todd R. Eigenschink (todd@tekinteractive.com)
Date: Tue May 14 2002 - 10:09:10 EST


I never saw any reponses to my oops post...but now I've narrowed
things further, to a point that makes it seem more serious.

I thought the problem might be reiserfs, so I copied everything
elsewhere (which killed the machine a number of times) and reformatted
the two reiserfs partitions as ext3. At the same time, I reduced the
raid partition from four disks to just two.

In particular, it had died at least once while it shouldn't have been
*touching* the raid partition--that partition only handles web stats,
and no web stats processing was running. The oops was in an rcp that
was copying a file to the smaller, non-raid ext3 partition.

In the process of copying everyting back, the machine died several
more times. OK, so that rules out reiserfs. I reconfigured to mount
everything as ext2. It lasted an awful lot longer (~ 36 hours), but
still died. Here's the latest oops. It looks a lot like the rest of
them.

I was considering going back to 2.2.20 when I thought it was the
combination of reiserfs + raid, since the machine ran 2.x flawlessly
for the longest time. But now that (in my mind) ext3, reiser, and
raid have all been ruled out, what's left seems like a pretty serious
problem. What else could/should I try to narrow the problem?

Dual P3/500, 2 GB RAM, Intel L440-GXC mainboard.

----------------------------------------------------------------------
ksymoops 2.4.5 on i686 2.4.19-pre8. Options used
     -V (default)
     -k /proc/ksyms (default)
     -l /proc/modules (default)
     -o /lib/modules/2.4.19-pre8/ (default)
     -m /boot/System.map-2.4.19-pre8 (specified)

No modules in ksyms, skipping objects
Warning (read_lsmod): no symbols in lsmod, is /proc/modules a valid lsmod file?
Warning (compare_maps): ksyms_base symbol vmalloc_to_page_R__ver_vmalloc_to_page
 not found in System.map. Ignoring ksyms_base entry
Oops: 0000
CPU: 0
EIP: 0010:[<c0115ba8>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010087
eax: c2802db4 ebx: c2002db4 ecx: 00000000 edx: 00000003
esi: c2802db0 edi: c2802db0 ebp: cd2fdf48 esp: cd2fdf2c
ds: 0018 es: 0018 ss: 0018
Process ld-linux.so.2 (pid: 18110, stackpage=cd2fd000)
Stack: c1095000 c2802db0 00000000 c2802db4 00000000 00000282 00000003 00000000
       c01295fe c1095000 00001000 c012bef0 00000000 ce03f5c0 ffffffea 00001000
       e0855de8 00001000 00000000 00001000 00001000 00001000 00004000 00000000
Call Trace: [<c01295fe>] [<c012bef0>] [<c0136d57>] [<c010889b>]
Code: 8b 01 85 45 fc 74 69 31 c0 9c 5e fa f0 fe 0d 80 a9 30 c0 0f

>>EIP; c0115ba8 <__wake_up+40/d0> <=====

>>eax; c2802db4 <END_OF_CODE+249a758/????>
>>ebx; c2002db4 <END_OF_CODE+1c9a758/????>
>>esi; c2802db0 <END_OF_CODE+249a754/????>
>>edi; c2802db0 <END_OF_CODE+249a754/????>
>>ebp; cd2fdf48 <END_OF_CODE+cf958ec/????>
>>esp; cd2fdf2c <END_OF_CODE+cf958d0/????>

Trace; c01295fe <unlock_page+62/68>
Trace; c012bef0 <generic_file_write+578/778>
Trace; c0136d57 <sys_write+8f/100>
Trace; c010889b <system_call+33/38>

Code; c0115ba8 <__wake_up+40/d0>
00000000 <_EIP>:
Code; c0115ba8 <__wake_up+40/d0> <=====
   0: 8b 01 mov (%ecx),%eax <=====
Code; c0115baa <__wake_up+42/d0>
   2: 85 45 fc test %eax,0xfffffffc(%ebp)
Code; c0115bad <__wake_up+45/d0>
   5: 74 69 je 70 <_EIP+0x70> c0115c18 <__wake_up+b0/d
0>
Code; c0115baf <__wake_up+47/d0>
   7: 31 c0 xor %eax,%eax
Code; c0115bb1 <__wake_up+49/d0>
   9: 9c pushf
Code; c0115bb2 <__wake_up+4a/d0>
   a: 5e pop %esi
Code; c0115bb3 <__wake_up+4b/d0>
   b: fa cli
Code; c0115bb4 <__wake_up+4c/d0>
   c: f0 fe 0d 80 a9 30 c0 lock decb 0xc030a980
Code; c0115bbb <__wake_up+53/d0>
  13: 0f 00 00 sldt (%eax)

2 warnings issued. Results may not be reliable.

----------------------------------------------------------------------

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This archive was generated by hypermail 2b29 : Tue May 14 2002 - 12:00:23 EST