On Tue, Jun 17, 2014 at 09:47:45PM -0700, Paul E. McKenney wrote: > On Tue, Jun 17, 2014 at 07:27:31PM -0700, Andi Kleen wrote: > > > OK. What would you suggest instead? If all we do is to revert the > > > > Hang checker should have two timer phases: > > > > Timer fires first time: > > - Save context switch counter on that. Force a reschedule to some > > work queue. Rearm timer > > > > Timer fires again: > > - Check reschedule count. If the reschedule count changed > > it was a real hang, otherwise ignore. > > I could take that approach, but the RT guys aren't going to thank me for > the wakeup associated with the work queue. I suppose that I could use
They can disable the hang timer if it's really problem. If they cannot tolerate a single context switch they likely cannot tolerate a timer firing either. -Andi -- 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/
