Re: [Xen-devel] transferring ownership of domheap pages

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 13/02/2009 00:59, "Dan Magenheimer" <dan.magenheimer@xxxxxxxxxx> wrote:

> I'd like to have routines to transfer ownership
> of a page both from domain D1 to anonymous and
> from anonymous to domain D2, without the necessity
> of doing a free_domheap_pages followed by an
> alloc_domheap_pages (primarily because I don't
> want to scrub the page as I know it will be
> immediately overwritten by the new owner).
> The anon-to-D2 would fail (return NULL) if
> D2 is fully allocated.
> 
> Any problems to watch out for?

See (and use) mm.c:steal_page(). Only works of course if D1 has no mappings
of the page.

 -- Keir



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel