On Tue, 10 Nov 2015 18:00:10 +0100 Peter Zijlstra <pet...@infradead.org> wrote:
> > Different per CPU timer may intercept parameter changes at slightly > > different time, so there is a race condition such that some CPUs may > > catch the period change later by one period, which results in a > > correct period change but at a different time, i.e. out of sync. > > Ah yes. So if the locking hurts I can come up with a lockless > algorithm for this. Shouldn't be too hard. Great! the current patch was designed to be lockless but a little awkward. My idea was to have a common start time, then we don't need to worry about CPUs out of sync, at most they will be off by one period then catch up. Thanks, Jacob -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
