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    SubjectRe: gettimeofday() jumping into the future
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    On Mon, 2008-03-31 at 10:55 +0200, Thomas Gleixner wrote:
    >
    > > + if (cycle_now < clock->cycle_last)
    > > + return 0;
    > > +
    >
    > No, this breaks wrapping clocksources e.g. pmtimer. We need a
    > different sanity check for that TSC crap.

    Yea. If you're going to do that sort of logic (which requires a costly
    cmpxchg as well), it should be done in the read() function of the
    clocksource.

    thanks
    -john




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