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    SubjectRe: [KVM PATCH v7 0/5] irqfd fixes and enhancements
    On Wed, Jul 01, 2009 at 11:53:26AM +0300, Avi Kivity wrote:
    > On 06/29/2009 09:28 PM, Gregory Haskins wrote:
    >> (Applies to kvm.git/master:4631e094)
    >> The following is the latest attempt to fix the races in irqfd/eventfd, as
    >> well as restore DEASSIGN support. For more details, please read the patch
    >> headers. I've restored the slow-work variant of the logic as a separate
    >> patch (5/5) so we can get a better idea of the true difference between
    >> the workqueue approach and the slow-work style. I am personally in favor
    >> of the slow-work approach since it doesnt require a mostly-idle+dedicated
    >> thread to hang around. But that is just me. 5/5 can be ignored, folded
    >> in to 3/5+4/5 as appropriate, or merged as is per the whim of Avi et. al.
    > I think a good compromise would be to create the workqueue when the
    > first VM is launched.
    >> As always, this series has been tested against the kvm-eventfd unit test
    >> with both 5/5 applied and unapplied, and everything appears to be
    >> functioning properly. You can download this test here:
    >> I've included version 4 of Davide's eventfd patch (ported to kvm.git) so
    >> that its a complete reviewable series. Note, however, that there may be
    >> later versions of his patch to consider for merging, so we should
    >> coordinate with him.
    > Davide's patch was merged upstream. Please take a look to make sure
    > this patchset is compatible with what was merged.
    > Patchset looks good to me, but I'd appreciate an ack from Michael (or
    > anyone else who's interested).

    For patches 1,3,4:
    Acked-by: Michael S. Tsirkin <>

    As for 5: IMHO, let's keep it simple meanwhile.


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