From mboxrd@z Thu Jan  1 00:00:00 1970
From: Tim Deegan <tim@xen.org>
Subject: Re: Clock jumping during live migrations
Date: Thu, 27 Oct 2011 12:07:03 +0100
Message-ID: <20111027110703.GG59656@ocelot.phlegethon.org>
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To: Nathan March <nathan@gt.net>
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Hi, 

At 15:31 -0700 on 26 Oct (1319643098), Nathan March wrote:
> Having an issue where the clock on a VM will jump ahead by the timezone 
> offset but only certain directions between certain machines.
> 
> For example, if I run a "sleep 1; date" loop on the VM and migrate it 
> from xen4 to xen7:
> 
> Wed Oct 26 21:14:46 PDT 2011
> Thu Oct 27 04:19:03 PDT 2011

...

> xen4 ~ # uname -a
> Linux xen4 3.0.3 #3 SMP Thu Sep 1 23:39:43 PDT 2011 x86_64 Intel(R) 

I think maybe you need these patches on your dom0 kernel:

http://lists.xensource.com/archives/html/xen-devel/2011-10/msg01762.html

Tim.