Re: [Xen-devel] new(?) big ugly crash

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

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>
> 
> 
> 
> -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
> "I think that's what they mean by   |
> "nickels a day can feed a child."   |       http://www.eff.org/
> I thought, "How can food be so      | http://www.anti-dmca.org/
> cheap over there?"  It's not, they  |--------------------------
> just eat the nickels." -- Peter Nguyen
> 
> 
> 
> -------------------------------------------------------
> This SF.Net email is sponsored by BEA Weblogic Workshop
> FREE Java Enterprise J2EE developer tools!
> Get your free copy of BEA WebLogic Workshop 8.1 today.
> http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxxxx
> https://lists.sourceforge.net/lists/listinfo/xen-devel



-------------------------------------------------------
This SF.Net email is sponsored by BEA Weblogic Workshop
FREE Java Enterprise J2EE developer tools!
Get your free copy of BEA WebLogic Workshop 8.1 today.
http://ads.osdn.com/?ad_id=4721&alloc_id=10040&op=click
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel