sched: wakeup preemption fix



wakeup preemption fix: do not make it dependent on p->prio.
Preemption purely depends on ->vruntime.

This improves preemption in mixed-nice-level workloads.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 3e3e13f3

kernel/sched_fair.c

+2 −4

Original line number	Diff line number	Diff line
		@@ -863,12 +863,10 @@ static void check_preempt_wakeup(struct rq rq, struct task_struct p)
		if (unlikely(se->load.weight != NICE_0_LOAD))
		gran = calc_delta_fair(gran, &se->load);

		if (delta > gran) {
		if (p->prio < curr->prio)
		if (delta > gran)
		resched_task(curr);
		}
		}
		}

		static struct task_struct pick_next_task_fair(struct rq rq)
		{