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    SubjectRe: [PATCH 3/3] eventfd: add internal reference counting to fix notifier race conditions
    On Mon, Jun 22, 2009 at 11:03:22AM -0700, Davide Libenzi wrote:
    > In your case of kernel-to-kernel scenario, why would you need eventfd at
    > all, if userspace role in that model is simply to create it?

    That's not 100% true. We have a mode where userspace is the producer
    and/or consumer (migration mode) and we switch between that and
    direct kernel-to-kernel communication.



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