Re: [Xen-devel] domU crashing, trying to determine why

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Jan 01, 2011 at 02:16:55PM -0500, Micah Anderson wrote:
> 
> I'm having a domU that is regularly crashing, without any obvious reason
> why. I set 'on_crash=preserve' to try and get a crash to try and get
> some clues, but what I got doesn't too obvious to me. I was hoping
> someone here would be able to give me some clues. 
> 
> Thanks for any clues anyone can give! Here is what I managed to eke out:
> 
> root@guillemot:/etc/xen# /usr/lib/xen-3.2-1/bin/xenctx -s 
> /boot/System.map-2.6.26-2-xen-686 11 0

So the domU has only 1 vcpu? 

-- Pasi

> eip: c01013a7 hypercall_page+0x3a7 flags: 00001246 i z p
> esp: c0389fbc
> eax: 00000000 ebx: 00000001   ecx: 00000000   edx: c0389fc8
> esi: 00000000 edi: 00000000   ebp: 00000000
>  cs: 00000061  ds: 0000007b    fs: 000000d8    gs: 00000000
> 
> Stack:
>  c0105f52 ffffffff 00000000 c06ca9dd 0009cf8a 00000000 00000020 ffffffff
>  c01028ab c0102810 00000020 c1631000 00000000 c038f88b c03ac580 0702080b
>  00000000
> 
> Code:
> cc cc cc cc cc cc cc cc cc cc cc cc cc cc b8 1d 00 00 00 cd 82 <c3> cc cc cc 
> cc cc cc cc cc cc cc 
> 
> Call Trace:
>   [<c01013a7>] hypercall_page+0x3a7  <--
>   [<c0105f52>] xen_safe_halt+0x9f 
>   [<c01028ab>] xen_idle+0x1b 
>   [<c0102810>] cpu_idle+0xa8 
>   [<c038f88b>] start_kernel+0x2f5 
> root@guillemot:/etc/xen# /usr/lib/xen-3.2-1/bin/xenctx -s 
> /boot/System.map-2.6.26-2-xen-686 11 1
> eip: c0170f39 file_kill+0x27 flags: 00001202 i nz
> esp: e74cbf2c
> eax: ec825e98 ebx: d7033a80   ecx: ee07207f   edx: e7672e80
> esi: d7033a80 edi: ed3942c0   ebp: ed396be8
>  cs: 00000061  ds: 0000007b    fs: 000000d8    gs: 00000000
> 
> Stack:
>  00000010 c01710ae ed420f00 e81b3a78 e82d5cfc e7218b00 e74ca000 c016080d
>  c123f020 e81b3a78 c01608e7 000001e8 c123f020 e7218b00 e7218b4c 00000000
>  c011c723 00000000 e59bba80 c01214aa 00000001 e7447a80 e7688580 00000000
>  e76885c0 00000000 ed4ebd00 00000000 e74ca000 c0121998 00000000 00000000
> 
> Code:
> 13 8b 43 04 89 42 04 89 10 89 5b 04 89 1b f0 fe 05 40 42 38 c0 <0f> b7 15 40 
> 42 38 c0 38 f2 0f 95 
> 
> Call Trace:
>   [<c0170f39>] file_kill+0x27  <--
>   [<c01710ae>] __fput+0xd2 
>   [<c016080d>] remove_vma+0x25 
>   [<c01608e7>] exit_mmap+0xbc 
>   [<c011c723>] mmput+0x24 
>   [<c01214aa>] do_exit+0x1ad 
>   [<c0121998>] do_group_exit+0x94 
>   [<c01219ce>] sys_exit_group+0xd 
>   [<c0103f76>] syscall_call+0x7 
>   [<c02c0000>] zone_wait_table_init+0x47 
> 
> 



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