From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@suse.com>
Subject: Re: Fatal crash on xen4.2 HVM + qemu-xen dm + NFS
Date: Mon, 17 Dec 2012 10:10:30 +0000
Message-ID: <50CEFDA602000078000B0B11@nat28.tlf.novell.com>
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To: Alex Bligh <alex@alex.org.uk>
Cc: Ian Campbell <Ian.Campbell@citrix.com>, Xen Devel <xen-devel@lists.xen.org>
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>>> On 14.12.12 at 15:54, Alex Bligh <alex@alex.org.uk> wrote:
> [ 1416.992402] BUG: unable to handle kernel paging request at ffff88073fee6e00

Assuming the address above is valid in the first place (i.e. you
have at least 32G installed), this very much suggests access to
a ballooned out page. Could you therefore suppress the use of
ballooning for debugging purposes, and see whether the issue
goes away then?

Jan