[Xen-devel] Re: [Fedora-xen] 2.6.31-1.2.65.xendom0.fc12.x86_64 crash on boot

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

On 09/15/09 04:39, Pasi Kärkkäinen wrote:
>> (XEN) mm.c:1697:d0 Bad L1 flags 800000
>>     

This looks like something trying to set the NX bit in a mapping, which
should be fine on this processor.  Could it be disabled in BIOS or
something?

> Jeremy: More info about the dom0 kernel crash here..
>
> -- Pasi
>
> On Tue, Sep 15, 2009 at 01:25:35PM +0100, M A Young wrote:
>   
>> > 
>>     
>>> > >
>>> > >gdb vmlinux
>>> > >x/i ffffffff81a017f1
>>>       
>> > 
>> > That should of course have been
>> > (gdb) x/i 0xffffffff81a017f1
>> > 0xffffffff81a017f1 <xen_load_gdt_boot+171>:        ud2a
>>     

Hm, OK.  Maybe the problem is that we haven't enabled NX in EFER at that
early point.   I'll cook something up.

    J

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