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    SubjectRe: [RFC PATCH 0/3] generic hypercall support
    Chris Wright wrote:
    > * Avi Kivity (avi@redhat.com) wrote:
    >
    >> Gregory Haskins wrote:
    >>
    >>> Cool, I will code this up and submit it. While Im at it, Ill run it
    >>> through the "nullio" ringer, too. ;) It would be cool to see the
    >>> pv-mmio hit that 2.07us number. I can't think of any reason why this
    >>> will not be the case.
    >>>
    >> Don't - it's broken. It will also catch device assignment mmio and
    >> hypercall them.
    >>
    >
    > Not necessarily. It just needs to be creative w/ IO_COND
    >

    Hi Chris,
    Could you elaborate? How would you know which pages to hypercall and
    which to let PF?

    -Greg

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