From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@citrix.com>
Subject: Re: dom0 kenrel crashes for openstack + libvirt + libxl
Date: Mon, 17 Nov 2014 12:40:47 +0000
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To: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Xing Lin <linxingnku@gmail.com>, Roger Pau =?ISO-8859-1?Q?Monn=E9?= <roger.pau@citrix.com>, xen-devel@lists.xen.org
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On Mon, 2014-11-17 at 12:35 +0000, Stefano Stabellini wrote:
> Many thanks for your efforts!
> 
> By any chance instead of rebuilding xen from source, have you tried
> installing xen-system-amd64 (apt-get install xen-system-amd64), the xen
> package for ubuntu?

From
https://launchpadlibrarian.net/183469597/buildlog_ubuntu-trusty-i386.nova_1%3A2014.2~b2-0ubuntu1~cloud0_UPLOADING.txt.gz the nova-compute-xen  package depends on:
 Depends: nova-compute-libvirt (= 1:2014.2~b2-0ubuntu1~cloud0), xen-system-amd64 | xen-system-i386
so I think this is already happening. I think the issue is that the
Debian/Ubuntu packages don't use xencommons and therefore haven't yet
picked up the stuff to start dom0's qemu (see my other reply).

Ian.