On Mon, Aug 03, 2015 at 07:30:32PM +0200, Frederic Weisbecker wrote: > > But you've forgotten about SCHED_DEADLINE, we count those in: > > rq->dl.dl_nr_running. > > Indeed. Hmm, there is no preemption between SCHED_DEALINE tasks, right? > So I can treat it like SCHED_FIFO.
Sadly no. Even though EDF has static job priority (once a job is activated its priority doesn't change anymore) DEADLINE also has a CBS component and that needs the tick regardless, even with a single task. So any deadline task running means we cannot stop the tick. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
