From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir.fraser@eu.citrix.com>
Subject: Re: Xen 3.4.0 - Windows 2008 Lockup
Date: Sat, 23 May 2009 11:24:07 +0100
Message-ID: <C63D8D57.BAC8%keir.fraser@eu.citrix.com>
References: <9b5c9bb30905230242l550d5694ue759eb48d25493e5@mail.gmail.com>
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To: Teck Choon Giam <giamteckchoon@gmail.com>, "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>
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On 23/05/2009 10:42, "Teck Choon Giam" <giamteckchoon@gmail.com> wrote:

> Is there any changes to acpi related for HVM?  My HVM windows 2008 is
> running stable for <3.4.0 and just upgraded the xen to version 3.4.0
> and hit the following which crash my HVM windows 2008 guest :(  This
> lockup will happen/occur very quickly upon bootup of such HVM.

Something timing/timer related must have chnaged in 3.4 to make this more
likely. However it is not impossible you could see that bluescreen on 3.3
too! And there is a workaround on 3.4 which does not exist on 3.3 -- add
viridian=1 to your domain config file. This will tell Windows it is running
on a hypervisor and thus to relax its timer checks.

Please give this a go rather than reverting.

 -- Keir