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    SubjectRe: [PATCH 1/5] perf events: add support for realtime clock attribute
    On Sun, 20 Mar 2011, David Ahern wrote:
    > +
    > + if (sample_type & PERF_SAMPLE_REALTIME)
    > + data->realtime = ktime_to_ns(ktime_get_real());

    That's going to live lock on any sample which happens to hit in a
    xtime_lock write locked section. I knew why I suggested adding
    tracepoints to the timekeeping code :)

    Thanks,

    tglx


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