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    SubjectRe: [PATCH v4 11/12] Let host know whether the guest can handle async PF in non-userspace context.
    On Thu, Jul 08, 2010 at 12:28:18AM -0400, Rik van Riel wrote:
    > On 07/06/2010 12:24 PM, Gleb Natapov wrote:
    > >If guest can detect that it runs in non-preemptable context it can
    > >handle async PFs at any time, so let host know that it can send async
    > >PF even if guest cpu is not in userspace.
    >
    > The code looks correct. One question though - is there a
    > reason to implement the userspace-only async PF path at
    > all, since the handling of async PF in non-userspace context
    > is introduced simultaneously?
    >
    Guest userspace-only async PF handling is added in patch 4 and
    non-userspace is added in patch 10. It is done for easy reviewing.
    If I implement everything in one patch it will be harder to see why
    things are done the way they are IMHO.

    --
    Gleb.


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