Re: [Xen-devel] kernel BUG at arch/xen/i386/mm/hypervisor.c:99!

[Jeff Clark <jeff@xxxxxxxxxxxxx>]

I am having a similar problem with xen 2.0.3.  2.6.10 in dom0, and 
2.4.28 in dom1.  Compiled the openafs kernel module, installed, insmod, 
etc... After a minute the console spews:
Failed to execute MMU updates.
invalid operand: 0000
CPU:    0
EIP:    0819:[<c0177265>]    Tainted: P
EFLAGS: 00010282
eax: 00000022   ebx: c0222300   ecx: cf612000   edx: fbff9000
esi: 00000000   edi: 0008a000   ebp: cf613e90   esp: cf613e84
ds: 0821   es: 0821   ss: 0821
Process master (pid: 325, stackpage=cf613000)<1>
Stack: c01e8a20 00000163 cfcd6228 cf613ec8 c01202b9 cfcd6224 0c23c163 
0008a000
       0008a000 00400000 c0286d08 d048a000 d0488000 c0286d08 00002000 
d0488000
       0000000a cf613eec c012053a d0800000 00002000 000001f2 00000163 
00000000
Call Trace: [<c01202b9>] [<c012053a>] [<d047b7ec>] [<d045c9e4>] [<c01393f4>]
   [<d047b7ec>] [<d045cc54>] [<d047b7ec>] [<d0424a13>] [<d045cfaa>] 
[<d045d0c3>]
   [<d045d46d>] [<c010ca3a>] [<c016efe3>]


And the virtual machine eventually becomes complete unstable (will not 
shutdown properly).
I have enabled kernel debugging, but the symols are not being resolved 
for some reason.  Any help would be appreciated.
Ryan Harper wrote:
> Running more SMP tests, using -unstable from 2005-01-25:
>
> 2.6.10 w/ CONFIG_SMP dom0 and multiple CONFIG_SMP domU domains (2) with
> vcpus (4 and 1 respectively) and  encountered this inside a domU kernel
> (4 vcpus).
>
> Failed to execute MMU updates.
> ------------[ cut here ]------------
> kernel BUG at arch/xen/i386/mm/hypervisor.c:99!
> invalid operand: 0000 [#1]
> PREEMPT SMP DEBUG_PAGEALLOC
> Modules linked in:
> CPU:    0
> EIP:    0061:[<c01157ef>]
>
> after this, both domUs are dead, though dom0 is still alive.
>
> Ryan Harper
>
>
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