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SubjectRe: BUG: 2.6.30.1 pv_ops kernel boot failure - bisected
On Tue, Aug 25, 2009 at 12:04:54PM +0100, James Dingwall wrote:
>
> Hi,
>
> I have encountered what appears to be a bug when using the 2.6.30 stable
> series as a pv_ops kernel under Xen 3.4.1. The problem appears to have
> been introduced with the following commit (provided I bisected it
> correctly)
>
> commit bb9b409349f533a919b6b6d95698fbe6ff4aa209
> Author: Andreas Herrmann <andreas.herrmann3@amd.com>
> Date: Mon Jun 8 15:55:09 2009 +0200
>
> x86: Detect use of extended APIC ID for AMD CPUs
>
> When I try and boot the domU (xm create -c) I do not get any output.
> With this commit reverted I can boot 2.6.30.5 pv_ops without issue,
> output follows below. The system is a dual Opteron 242. If more
> details about the hardware or configuration are required to debug this
> please let me know. I'm willing to test any patches.


So it seems that commit

commit 2cb078603abb612e3bcd428fb8122c3d39e08832
Author: Jeremy Fitzhardinge <jeremy@goop.org>
Date: Wed Jul 22 09:59:35 2009 -0700

x86, amd: Don't probe for extended APIC ID if APICs are disabled

If we've logically disabled apics, don't probe the PCI space for the
AMD extended APIC ID.

[ Impact: prevent boot crash under Xen. ]

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Reported-by: Bastian Blank <bastian@waldi.eu.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

needs to be added to 2.6.30.y for proper boot under Xen.
James, can you test this please?


Thanks,

Andreas

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