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RE: [Xen-devel] Error restoring DomU when using GPLPV

To: "Keir Fraser" <keir.fraser@xxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Error restoring DomU when using GPLPV
From: "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
Date: Tue, 4 Aug 2009 19:34:22 +1000
Cc: Joshua West <jwest@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Error restoring DomU when using GPLPV
> 
> Just a theory. Maybe you could try unmapping grant/shinfo pages in the
> suspend callback? This may not help for live migration though, where
pages
> get transmitted before the callback. It may be necessary to allow dom0
to
> specify 'map me a page but not if it's special' and plumb that up to
> xc_domain_save. It'd be good to have the theory proved first.
> 

Can do. What is the opposite of 'XENMEM_add_to_physmap' which I assume
I'll need to unmap the grant pages? Is it XENMEM_decrease_reservation?

James

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