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

To: James Harper <james.harper@xxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] Error restoring DomU when using GPLPV
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Tue, 04 Aug 2009 14:12:48 +0100
Cc: Joshua West <jwest@xxxxxxxxxxxx>
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On 04/08/2009 12:34, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

>> Like I said before -- unmapping the gnttab pages I think will not help
> you
>> for live migration, but I suppose it is a reasonable thing to do
> anyway. For
>> live migration I think xc_domain_save needs t get a bit smarter about
>> Xenheap pages in HVM guests.
> Understood. Do you have any idea about why it worked fine under 3.3.x
> but not 3.4.x?

The bit of code in 3.3's xc_domain_save.c that is commented "Skip PFNs that
aren't really there" is removed in 3.4. That will be the reason.

 -- Keir

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