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

[Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>]

Here's a first cut.  Works only from anon to non-anon
or non-anon to anon (not non-anon1 to non-anon2).

> -----Original Message-----
> From: Dan Magenheimer 
> Sent: Thursday, February 12, 2009 5:59 PM
> To: Xen-Devel (E-mail)
> Subject: transferring ownership of domheap pages
> 
> 
> 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?
> 
> Thanks,
> Dan
> 
> P.S. Only has to work on 64-bit Xen if that matters.
>

Attachment: reassign.patch
Description: Binary data

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