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xen-devel
Re: [Xen-devel] new(?) big ugly crash
Can you point us at the vmlinux/xen-syms files?
-- Keir
>
> On Jul 26, 2004, at 12:01 PM, Derek Glidden wrote:
>
> >
> > On Jul 26, 2004, at 8:10 AM, Keir Fraser wrote:
> >
> >>
> >> Can you easily reproduce this? All the subsequent oopses are because
> >> our panic() when the mmu updates fail ought to be a BUG() [BUG doesn't
> >> try to sync disks; panic does] ---- it's nothing to do with XFS.
>
> ok, it blew up again and this time I got slightly better debugging
> info. Again I had started and stopped a few VMs and did "xend stop"
> when it all went pear-shaped.
>
> Some time shortly before the crash, I noticed this amidst the multitide
> of "GPF (0004)" messages that Xen emits:
>
> (XEN) (file=traps.c, line=466) GPF (0004): fc528028 -> fc52a8f4
> (XEN) (file=traps.c, line=352) Page fault: fc51c7c7 -> fc52a750
> (XEN) (file=traps.c, line=466) GPF (0004): fc528028 -> fc52a8f4
>
> I've never see a "Page fault" message before, so don't know if it's
> related.
>
> Here's the first bit of the actual Oops with some Xen messages that
> might be of some use:
>
> (XEN) (file=/opt/src/xeno/xeno-unstable.bk/xen/include/asm/mm.h,
> line=215) Unexpected type (saw c0000000 != exp e0000000) for pfn
> 00003043
> (XEN) DOM0: (file=memory.c, line=248) Bad page type for pfn 00003043
> (d0000002)
> invalid operand: 0000
> CPU: 0
> EIP: 0819:[<c01e3755>] Not tainted
> EFLAGS: 00211282
> eax: 00000022 ebx: c032c830 ecx: c10e4000 edx: fbff9000
> esi: 00000000 edi: ffffffff ebp: c11eff28 esp: c11eff1c
> ds: 0821 es: 0821 ss: 0821
> Process xfsbufd (pid: 7, stackpage=c11ef000)<1>
> Stack: c02a9db4 0038710c c0444000 c11eff44 c01dd9df c038710c 03043063
> c12b6f5c
> c10e4000 00000000 c11eff58 c010852a c12b6f5c c12b6f5c c12b6f5c
> c11eff84
> c0105de1 00000000 00000000 c12b6f5c c11ee000 00000000 c031b100
> 000a458b
> Call Trace: [<c01dd9df>] [<c010852a>] [<c0105de1>] [<c0105b28>]
> [<c0105ab0>]
> [<c01d2127>] [<c01d8c6e>] [<c01d2080>]
>
>
> Again it caused a "cascade" of xfsbufd Oopses until it rebooted itself.
>
> I'm not sure why ksymoops continues to insist "code line not seen."
> I've compiled on just about all the kernel-hacking options possible.
> If there's something I'm not doing right, I'd be happy to make it go
> the right way so it would stop whining about that.
>
>
> # ksymoops -m /boot/System.map-2.4.26-xen0 oops.txt
> ksymoops 2.4.9 on i686 2.4.26-xeno-xen0. Options used
> -V (default)
> -k /proc/ksyms (default)
> -l /proc/modules (default)
> -o /lib/modules/2.4.26-xeno-xen0/ (default)
> -m /boot/System.map-2.4.26-xen0 (specified)
>
> SGI XFS with no debug enabled
> Kernel panic: Failed to execute MMU updates
> SGI XFS with no debug enabled
> invalid operand: 0000
> CPU: 0
> EIP: 0819:[<c01e3755>] Not tainted
> Using defaults from ksymoops -t elf32-i386 -a i386
> EFLAGS: 00211282
> eax: 00000022 ebx: c032c830 ecx: c10e4000 edx: fbff9000
> esi: 00000000 edi: ffffffff ebp: c11eff28 esp: c11eff1c
> ds: 0821 es: 0821 ss: 0821
> Process xfsbufd (pid: 7, stackpage=c11ef000)<1>
> Stack: c02a9db4 0038710c c0444000 c11eff44 c01dd9df c038710c 03043063
> c12b6f5c
> c10e4000 00000000 c11eff58 c010852a c12b6f5c c12b6f5c c12b6f5c
> c11eff84
> c0105de1 00000000 00000000 c12b6f5c c11ee000 00000000 c031b100
> 000a458b
> Call Trace: [<c01dd9df>] [<c010852a>] [<c0105de1>] [<c0105b28>]
> [<c0105ab0>]
> [<c01d2127>] [<c01d8c6e>] [<c01d2080>]
> Warning (Oops_read): Code line not seen, dumping what data is available
>
>
> >>EIP; c01e3755 <_flush_page_update_queue+75/80> <=====
>
> >>ebx; c032c830 <update_queue+10/4000>
> >>ecx; c10e4000 <_end+d6f15c/41071bc>
> >>ebp; c11eff28 <_end+e7b084/41071bc>
> >>esp; c11eff1c <_end+e7b078/41071bc>
>
> Trace; c01dd9df <destroy_context+17f/190>
> Trace; c010852a <__mmdrop+2a/50>
> Trace; c0105de1 <schedule+251/390>
> Trace; c0105b28 <schedule_timeout+58/b0>
> Trace; c0105ab0 <process_timeout+0/20>
> Trace; c01d2127 <pagebuf_daemon+a7/200>
> Trace; c01d8c6e <arch_kernel_thread+2e/40>
> Trace; c01d2080 <pagebuf_daemon+0/200>
>
>
>
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
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> "nickels a day can feed a child." | http://www.eff.org/
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> cheap over there?" It's not, they |--------------------------
> just eat the nickels." -- Peter Nguyen
>
>
>
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