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

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] domU crashing, trying to determine why
From: Micah Anderson <micah@xxxxxxxxxx>
Date: Sat, 01 Jan 2011 14:16:55 -0500
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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
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

 c0105f52 ffffffff 00000000 c06ca9dd 0009cf8a 00000000 00000020 ffffffff
 c01028ab c0102810 00000020 c1631000 00000000 c038f88b c03ac580 0702080b

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

 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

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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