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xen-devel
Re: [Xen-devel] scrubbing free'd pages
On 25/05/2010 14:33, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:
>> Other memory pages the domain freeing the
>> pages must scrub them itself before freeing them back to Xen.
>
> Is that true for a HVM domain making a decrease_reservation hypercall?
> If so I should modify my code accordingly...
Yes you should.
> it also means I need to
> know if the page I'm decreasing is an unpopulated PoD page or not too.
Certainly you could avoid it in that case. Actually I think the PoD code can
detect and reclaim allocated-but-zeroed pages however. But not sure if you
really have to rely on that or not.
-- Keir
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