Commit 15a8641e authored Jun 19, 2008 by Peter Zijlstra Committed by Ingo Molnar Jun 19, 2008

sched: rt-group: fix RR buglet



In tick_task_rt() we first call update_curr_rt() which can dequeue a runqueue
due to it running out of runtime, and then we try to requeue it, of it also
having exhausted its RR quota. Obviously requeueing something that is no longer
on the runqueue will not have the expected result.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Daniel K. <dk@uw.no>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent ad2a3f13

kernel/sched_rt.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -549,8 +549,10 @@ static
		void requeue_rt_entity(struct rt_rq rt_rq, struct sched_rt_entity rt_se)
		{
		struct rt_prio_array *array = &rt_rq->active;
		struct list_head *queue = array->queue + rt_se_prio(rt_se);

		list_move_tail(&rt_se->run_list, array->queue + rt_se_prio(rt_se));
		if (on_rt_rq(rt_se))
		list_move_tail(&rt_se->run_list, queue);
		}

		static void requeue_task_rt(struct rq rq, struct task_struct p)