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    SubjectRe: quicklists confuse meminfo
    On Mon, Mar 10, 2008 at 11:35:50AM -0700, Jeremy Fitzhardinge wrote:
    > Hm, given that Xen doesn't make any topology guarantees about vcpus, I
    > don't think it would make much difference. I think it would only be
    > observable if you actually pinned the vcpus to physical siblings.
    > Besides we could easily maintain sibling info and look to see if we're
    > about to reload cr3 to match the other thread(s), then just use the same
    > pgd copy.

    The optimization doesn't really require any topology information;
    you just should make sure that if you have a VM shared between
    different CPUs that it has the same CR3. The easiest way to enforce
    that is to always only use a single CR3 for a VM.


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