Re: kswapd crashed 2.4.27

[Marcelo Tosatti]

On Fri, Oct 29, 2004 at 08:27:29AM +0200, Andreas Hartmann wrote:
> Hello!
> 
> I had a hard crash this morning on a XSeries 235 with IBM Serveraid, 512
> MB RAM and 1024 MB Swap during rsyncing datas to this machine. The datas
> were copied to a drbd-device, which reported some seconds before:
> 
> Oct 29 05:30:20 FAGINTSC kernel: drbd16: Epoch set size wrong!!found=1061
> reported=1060
> 
> 
> ~> ksymoops -m /usr/src/linux-2.4.27/System.map oops
> ksymoops 2.4.5 on i686 2.4.27.  Options used
>      -V (default)
>      -k /proc/ksyms (default)
>      -l /proc/modules (default)
>      -o /lib/modules/2.4.27/ (default)
>      -m /usr/src/linux-2.4.27/System.map (specified)
> 
> Oct 29 05:30:29 FAGINTSC kernel: CPU:    0
> Oct 29 05:30:29 FAGINTSC kernel: EIP:    0010:[<c0135400>]    Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> Oct 29 05:30:29 FAGINTSC kernel: EFLAGS: 00010002
> Oct 29 05:30:29 FAGINTSC kernel: eax: ffffffff   ebx: dbcbd160   ecx:
> 00000001   edx: dffed600
> Oct 29 05:30:29 FAGINTSC kernel: esi: c158a37c   edi: 00001db7   ebp:
> dffed6a4   esp: c15b9f30
> Oct 29 05:30:29 FAGINTSC kernel: ds: 0018   es: 0018   ss: 0018
> Oct 29 05:30:29 FAGINTSC kernel: Process kswapd (pid: 5, stackpage=c15b9000)
> Oct 29 05:30:29 FAGINTSC kernel: Stack: 00000000 c1243108 c158a38c
> c158a384 c15b8000 dffed600 00000000 00000008
> Oct 29 05:30:29 FAGINTSC kernel:        00000000 00000000 00000000
> 00000020 000001d0 c028f69c c028f69c c01368ac
> Oct 29 05:30:29 FAGINTSC kernel:        c15b9f90 000001d0 0000003c
> 00000020 c0136952 c15b9f90 00000246 00000000
> Oct 29 05:30:29 FAGINTSC kernel: Call Trace:    [<c01368ac>] [<c0136952>]
> [<c0136b0c>] [<c0136b78>] [<c0136cbd>]
> Oct 29 05:30:29 FAGINTSC kernel:   [<c0105000>] [<c010745e>] [<c0136c20>]
> Oct 29 05:30:29 FAGINTSC kernel: Code: 8b 00 47 3b 44 24 08 75 f7 8b 5e 2c
> 89 fa 8b 46 4c 88 d9 d3
> 
> 
> >>EIP; c0135400 <kmem_cache_reap+230/340>   <=====
> 
> >>eax; ffffffff <END_OF_CODE+1f701d74/????>
> >>ebx; dbcbd160 <_end+1b96ee68/204b3d68>
> >>edx; dffed600 <_end+1fc9f308/204b3d68>
> >>esi; c158a37c <_end+123c084/204b3d68>
> >>edi; 00001db7 Before first symbol
> >>ebp; dffed6a4 <_end+1fc9f3ac/204b3d68>
> >>esp; c15b9f30 <_end+126bc38/204b3d68>
> 
> Trace; c01368ac <shrink_caches+1c/60>
> Trace; c0136952 <try_to_free_pages_zone+62/f0>
> Trace; c0136b0c <kswapd_balance_pgdat+6c/b0>
> Trace; c0136b78 <kswapd_balance+28/40>
> Trace; c0136cbd <kswapd+9d/b7>
> Trace; c0105000 <_stext+0/0>
> Trace; c010745e <arch_kernel_thread+2e/40>
> Trace; c0136c20 <kswapd+0/b7>
> 
> Code;  c0135400 <kmem_cache_reap+230/340>
> 00000000 <_EIP>:
> Code;  c0135400 <kmem_cache_reap+230/340>   <=====
>    0:   8b 00                     mov    (%eax),%eax   <=====
> Code;  c0135402 <kmem_cache_reap+232/340>
>    2:   47                        inc    %edi
> Code;  c0135403 <kmem_cache_reap+233/340>
>    3:   3b 44 24 08               cmp    0x8(%esp,1),%eax
> Code;  c0135407 <kmem_cache_reap+237/340>
>    7:   75 f7                     jne    0 <_EIP>
> Code;  c0135409 <kmem_cache_reap+239/340>
>    9:   8b 5e 2c                  mov    0x2c(%esi),%ebx
> Code;  c013540c <kmem_cache_reap+23c/340>
>    c:   89 fa                     mov    %edi,%edx
> Code;  c013540e <kmem_cache_reap+23e/340>
>    e:   8b 46 4c                  mov    0x4c(%esi),%eax
> Code;  c0135411 <kmem_cache_reap+241/340>
>   11:   88 d9                     mov    %bl,%cl
> Code;  c0135413 <kmem_cache_reap+243/340>
>   13:   d3 00                     roll   %cl,(%eax)
> 
> 
> Does anybody know what could be broken?

You're using drbd right?

What does this message mean

Oct 29 05:30:20 FAGINTSC kernel: drbd16: Epoch set size wrong!!found=1061
reported=1060

Send the oops to the drbd people.
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