On Monday 08 of August 2011 19:26:17 Paweł Sikora wrote: > On Monday 08 of August 2011 18:35:25 Paweł Sikora wrote: > > On Monday 08 of August 2011 17:57:05 Herbert Poetzl wrote: > > > On Mon, Aug 08, 2011 at 05:32:21PM +0200, Pawel Sikora wrote: > > > > On Monday 08 of August 2011 16:28:20 Herbert Poetzl wrote: > > > > > > >> ah, I forgot, yes there is a way (not the easiest though) > > > >> to decode the output your ipmi console recorded: > > > > > > >> - extract the byte sequence listed as Code: > > > >> - search for that sequence in your vmlinux > > > >> - add the offset of <xx> relative to the first byte (44) > > > >> - lookup the resulting address with addr2line or > > > >> compare it with objdump -t vmlinux > > > > > > > i've copied v3.0+vserver vmlinuz + more stack traces to web site: > > > > > > > http://pluto.agmk.net/kernel/vmlinuz-3.0.0-vs2.3.1-pre8-dirty > > > > http://pluto.agmk.net/kernel/vserver-crash.jpg > > > > > > good idea, but could you also upload the vmlinux (x not z) > > > from your build tree? > > > > bzipped vmlinux uploaded: http://pluto.agmk.net/kernel/vmlinux.bz2 > > > > update, screenshot with backtraces is for 2.6.39.y+vserver, correct vmlinux uploaded. > > i've isolated so far two code points from screenshot: > > trace 1, 3, 5: > > ffffffff81165a19: 90 nop > ffffffff81165a1a: 90 nop > ffffffff81165a1b: 90 nop > ffffffff81165a1c: 90 nop > ffffffff81165a1d: 90 nop > ffffffff81165a1e: 90 nop > ffffffff81165a1f: 90 nop > > ffffffff81165a20 <vfsmount_lock_local_lock>: > ffffffff81165a20: 55 push %rbp > ffffffff81165a21: 48 c7 c0 f0 ee 00 00 mov $0xeef0,%rax > ffffffff81165a28: 48 89 e5 mov %rsp,%rbp > ffffffff81165a2b: 65 48 03 04 25 30 c5 add %gs:0xc530,%rax > ffffffff81165a32: 00 00 > ffffffff81165a34: ba 00 01 00 00 mov $0x100,%edx > ffffffff81165a39: f0 66 0f c1 10 lock xadd %dx,(%rax) > ffffffff81165a3e: 38 f2 cmp %dh,%dl > ffffffff81165a40: 74 06 je ffffffff81165a48 <vfsmount_lock_local_lock+0x28> > ffffffff81165a42: f3 90 pause > ffffffff81165a44: 8a 10 mov (%rax),%dl > ffffffff81165a46: eb f6 jmp ffffffff81165a3e <vfsmount_lock_local_lock+0x1e> > ffffffff81165a48: c9 leaveq > ffffffff81165a49: c3 retq > > trace 4: > > ffffffff81161310 <d_lookup>: > ffffffff81161310: 55 push %rbp > ffffffff81161311: 48 89 e5 mov %rsp,%rbp > ffffffff81161314: 48 83 ec 20 sub $0x20,%rsp > ffffffff81161318: 4c 89 65 f0 mov %r12,-0x10(%rbp) > ffffffff8116131c: 4c 89 6d f8 mov %r13,-0x8(%rbp) > ffffffff81161320: 49 89 f4 mov %rsi,%r12 > ffffffff81161323: 48 89 5d e8 mov %rbx,-0x18(%rbp) > ffffffff81161327: 49 89 fd mov %rdi,%r13 > ffffffff8116132a: 8b 1d 50 0f 6a 00 mov 0x6a0f50(%rip),%ebx # ffffffff81802280 <rename_lock> > ffffffff81161330: f6 c3 01 test $0x1,%bl > ffffffff81161333: 75 26 jne ffffffff8116135b <d_lookup+0x4b> > ffffffff81161335: 4c 89 e6 mov %r12,%rsi > ffffffff81161338: 4c 89 ef mov %r13,%rdi > ffffffff8116133b: e8 d0 fd ff ff callq ffffffff81161110 <__d_lookup> > ffffffff81161340: 48 85 c0 test %rax,%rax > ffffffff81161343: 75 08 jne ffffffff8116134d <d_lookup+0x3d> > ffffffff81161345: 3b 1d 35 0f 6a 00 cmp 0x6a0f35(%rip),%ebx # ffffffff81802280 <rename_lock> > ffffffff8116134b: 75 dd jne ffffffff8116132a <d_lookup+0x1a> > ffffffff8116134d: 48 8b 5d e8 mov -0x18(%rbp),%rbx > ffffffff81161351: 4c 8b 65 f0 mov -0x10(%rbp),%r12 > ffffffff81161355: 4c 8b 6d f8 mov -0x8(%rbp),%r13 > ffffffff81161359: c9 leaveq > ffffffff8116135a: c3 retq > > trace 2: > > in progress.... > possible points: ffffffff8115f740 <__d_find_any_alias>: (...) ffffffff8115f81e: 45 31 c0 xor %r8d,%r8d ffffffff8115f821: 83 ce ff or $0xffffffff,%esi ffffffff8115f824: eb c0 jmp ffffffff8115f7e6 <__d_find_any_alias+0xa6> ffffffff8115f826: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) ffffffff81161110 <__d_lookup>: (...) ffffffff811612fe: 45 31 c0 xor %r8d,%r8d ffffffff81161301: 83 ce ff or $0xffffffff,%esi ffffffff81161304: eb c0 jmp ffffffff811612c6 <__d_lookup+0x1b6> ffffffff81161306: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1)