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

["James Harper" <james.harper@xxxxxxxxxxxxxxxx>]

> 
> On 04/08/2009 10:34, "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
wrote:
> 
> >> 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?
> 
> Oh yes, there is no direct opposite of add_to_physmap... But I think
> decrease_reservation will work okay in this case, fortunately.
> 

Given that I'm not going to use the grant table subsequent to unmapping
them I'll probably get away with it, but does
XENMEM_decrease_reservation actually tell xen that the pages are no
longer actually part of the grant table?

James

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