Re: [Xen-devel] treatment grant frames during save/restore

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 28/05/2010 09:01, "Jan Beulich" <JBeulich@xxxxxxxxxx> wrote:

> Wouldn't is suffice to adjust XEN_DOMCTL_getpageframeinfo{2,3} to
> report these pages as special (not sure whether a new type would
> be needed, or whether simply returning XEN_DOMCTL_PFINFO_XTAB
> would be acceptable), thus allowing the tools to skip them as
> necessary? This of course implies that the tools would need to issue
> the call for HVM guests (currently I think they do so only for PV ones),
> that the actual page contents is irrelevant post-restore, and that
> there being a hole in the physical address space post-restore isn't
> a problem for the pv drivers.

Yep that would probably work. And also potentially gets rid of one lot of
"if-hvm-else-pv" branched code in xc_domain_save.c. I'd take a patch to do
that if you want to pick this item up.

 -- Keir



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