Re: [Xen-devel] [V9 PATCH 6/8] pvh dom0: Add and remove foreign pages

["Jan Beulich" <jbeulich@xxxxxxxx>]

>>> Mukesh Rathor <mukesh.rathor@xxxxxxxxxx> 04/19/14 3:00 AM >>>
>On Thu, 17 Apr 2014 14:58:42 +0100
>"Jan Beulich" <JBeulich@xxxxxxxx> wrote:
>>Why can't this be done as pages get de-allocated (which is a
>>preemptable process already)?
>
>We are looking for foreign entries in the current privileged domain's
>p2m and wanting to release refcnt on them. I don't understand which
>pages being de-allocated we would look at? You mean p2m leaf pages?

Whenever a last-level P2M page gets released, it could be inspected for holding
foreign mappings, and the respective page refs could be released at that point.
But I say this without having looked at how cumbersome that might end up 
being...

Jan


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