Commit 8bc6767a authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarIngo 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)

{