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Re: [Xen-devel] Re: xen/stable 32bit dom0 kernel crashes early

To: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: xen/stable 32bit dom0 kernel crashes early on boot
From: Jeremy Fitzhardinge <jeremy@xxxxxxxx>
Date: Tue, 09 Mar 2010 11:33:18 -0800
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On 03/08/2010 10:17 AM, Konrad Rzeszutek Wilk wrote:
On Sat, Mar 06, 2010 at 05:05:09PM +0200, Pasi Kärkkäinen wrote:
On Fri, Mar 05, 2010 at 12:51:02PM +0200, Pasi Kärkkäinen wrote:
On Fri, Mar 05, 2010 at 09:13:59AM +0200, Pasi Kärkkäinen wrote:
On Thu, Mar 04, 2010 at 01:33:39PM -0800, Jeremy Fitzhardinge wrote:
On 03/04/2010 12:28 PM, Pasi Kärkkäinen wrote:
It was saying the above.. xen/stable booted on baremetal doesn't say anything about NX.

What happens if you boot with noexec=no on the kernel command line?

noexec=no didn't change anything.. still crashes. console output is the same as 
I also checked the BIOS, it didn't seem to have any NX settings.

latest xen/master seems to boot OK on this box, with the same Xen 
4.0.0-rc5 hypervisor.

successful bootlog of xen/master here:

xen/stable boots OK on baremetal (without Xen).
Does it help to have a log of the boot on baremetal?

Here are a couple of xen/stable crashing boots as Xen dom0,
with various debugging options, and also with "acpi=off":
Could you find what is at c0405dbe and around that area with gdb?

I think the problem is that there's something happening in kernel/head_32.S to test for NX and disable it if not present, which isn't happening on the Xen startup path. But I haven't investigated that yet.


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