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

Tue, 15 Sep 2009 14:02:12 -0700

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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