From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: [PATCH v5 0/9] toolstack-based approach to pvhvm
	guest kexec
Date: Wed, 7 Jan 2015 12:03:07 +0100
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To: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Andrew Jones <drjones@redhat.com>, Julien Grall <julien.grall@linaro.org>, Wei Liu <wei.liu2@citrix.com>, Ian Campbell <ian.campbell@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Andrew Cooper <andrew.cooper3@citrix.com>, Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>, David Vrabel <david.vrabel@citrix.com>, Jan Beulich <jbeulich@suse.com>, xen-devel@lists.xenproject.org, Keir Fraser <keir@xen.org>
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On Wed, Jan 07, Vitaly Kuznetsov wrote:

> The thing is .. we don't have these pages when kexec is being performed,
> they are already ballooned out and the hypervisor doesn't have the
> knowledge of which GFNs should be re-populated. I think it is possible
> to keep track of all pages the guest balloons out for this purpose, but 
> ..

Have you tried to make the new guest a PoD guest? That way it may work
out of the box already.

Olaf