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    SubjectRe: [PATCH 1/2] perf: fix PERF_EVENT_IOC_PERIOD to force-reset the period
    On Wed, 27 Nov 2013, Will Deacon wrote:

    > Vince Weaver reports that, on all architectures apart from ARM,
    > PERF_EVENT_IOC_PERIOD doesn't actually update the period until the next
    > event fires. This is counter-intuitive behaviour and is better dealt
    > with in the core code.

    To be fair, it was Andreas Sandberg <andreas.sandberg@it.uu.se>
    who noticed this issue and reported it to me (in the context of
    the manpage being wrong). I just passed it on to the linux-kernel list.

    Vince


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