From mboxrd@z Thu Jan  1 00:00:00 1970
From: Olaf Hering <olaf@aepfle.de>
Subject: Re: reliable live migration of large and busy guests
Date: Wed, 7 Nov 2012 15:13:02 +0100
Message-ID: <20121107141302.GA24950@aepfle.de>
References: <20121106202816.GA29655@aepfle.de>
	<CCBF2785.442DA%keir.xen@gmail.com>
	<20121106221806.GA1813@aepfle.de> <50999ACF.4040106@citrix.com>
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To: Andrew Cooper <andrew.cooper3@citrix.com>
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On Tue, Nov 06, Andrew Cooper wrote:

> Is there wisdom in having a new kind of live migrate which, when pausing
> the VM on the source host, resumes the VM on the destination host.  Xen
> would have to track not-yet-sent pages and pause the guest on pagefault,
> and request the required page as a matter of priority.

On the receiving side all missing pages could be handled as "paged"
(just nominating a missing pfn should be enough). A pager can then
request them from the sender host.

Olaf