Re: [Xen-devel] Xen 2.0 / XenLinux 2.6.9 oops in handle_mm_fault

[Christian Limpach <Christian.Limpach@xxxxxxxxxxxx>]

On Sat, Nov 13, 2004 at 01:51:11AM +0000, Nuno Silva wrote:
> Chris Wedgwood wrote:
> >Using XenLinux 2.6.9 trying to do very minimal work in domain0
> >(building a module to get networking up) I'm seeing an oops in
> >handle_mm_fault...  the full oops is visible at (photo, serial console
> >isn't working) http://stupidest.org/xen2-crash2.png
> >
> >The oops is basically:
> >
> >Unable to handle kernel paging request at virtual address 000112a5.
> >*pde = ma 00000000 55555000, with ca call chain of:
> >
> >    handle_mm_fault
> >    do_mm_pgoff
> >    handle_IRQ_event
> >    do_IRQ
> >    evtch_do_upcall
> >    hypervisor_callback
> >
> >anyone got any ideas?
> 
> Wild guess: you recompiled with CONFIG_PREEMPT enabled. Try disabling 
> PREEMPT and report back.

no -- we always build with CONFIG_PREEMPT and the non-CONFIG_PREEMPT
code paths are hardly tested at all.

    christian



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