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From: Paul Brook <paul@codesourcery.com>
Subject: Re: [Qemu-devel] Re: [PATCH 0/4] Machine config files
Date: Mon, 6 Jul 2009 23:39:37 +0100
References: <20090610173803.4674.82538.stgit@wren.home>
	<4A52284C.9080604@redhat.com> <4A523444.30002@codemonkey.ws>
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To: qemu-devel@nongnu.org
Cc: "Michael S. Tsirkin" <mst@redhat.com>, Jan Kiszka <jan.kiszka@siemens.com>, Markus Armbruster <armbru@redhat.com>, Gerd Hoffmann <kraxel@redhat.com>, Avi Kivity <avi@redhat.com>

> Most importantly, machine config should not be sent until non-live
> migration kicks in.  At this point, the device tree is stable because
> the guest isn't running.  The device tree should be the first section
> saved for non-live migration.

RAM is part of the machine config, and can be hotplugged[1], so you need at 
least that before you start transferring anything.

Paul

[1] We don't currently have user accessible knobs for this, but all the code 
is there.