Re: [Xen-devel] long latency of domain shutdown

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 8/5/08 10:58, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote:

> While looking at this I wondered whether there really is a way for
> Xen heap pages to end up being guest page tables (or similarly
> descriptor table ones)? I would think if that happened this would be
> a bug (and perhaps a security issue). If it cannot happen, then the
> RELMEM_* states could be simplified and
> domain_relinquish_resources() shortened.

You mean just force page-table type counts to zero, and drop main reference
count by the same amount? Might work. Would need some thought.

8500 cycles per pte is pretty fantastic. I suppose a few atomic ops are
involved. Are you running on an old P4? :-)

 -- Keir



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