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

[Charles Gruener <cjg9411@xxxxxxx>]

Well, for some reason, the BIOS had NX disabled by default.  After  
enabling, I can now get further.  I've attached the output I'm now  
seeing.  Could this now be related to the myoung kernel?
Many thanks.

Charles

Attachment: nx_enabled.txt.gz
Description: GNU Zip compressed data

On Sep 15, 2009, at 3:58 PM, Jeremy Fitzhardinge wrote:

> 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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