Re: [Xen-devel] [PATCH][VT] Patch to allow VMX domains to be destroyed or shut down cleanly

[Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>]

On 13 Sep 2005, at 22:37, Khoa Huynh wrote:

> Thanks for your comments.  The current code *does* drop the page
> reference counts for those tainted-refcnt pages. Even after
> getting decremented, the ref counts for these pages
> are still not 0 (most are 1, some are 2, 3, or even 4).
I mean forcibly decrement them to zero and free them right there and 
then. Of course, as you point out, the problem is that some of the 
pages are mapped in domain0. I'm not sure how we can distinguish 
tainted refcnts from genuine external references. Perhaps there's a 
proper way we should be destructing the full shadow pagetables such 
that the refcnts end up at zero.
 -- Keir


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