Commit 93db9129 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

sched,locktorture: Convert to sched_set_fifo() 



Because SCHED_FIFO is a broken scheduler model (see previous patches)
take away the priority field, the kernel can't possibly make an
informed decision.

Effectively changes prio from 99 to 50.

Cc: paulmck@kernel.org
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: default avatarIngo Molnar <mingo@kernel.org>
Reviewed-by: default avatarPaul E. McKenney <paulmck@kernel.org>
parent 7a40798c

kernel/locking/locktorture.c

+2 −8
Original line number Diff line number Diff line
@@ -436,8 +436,6 @@ static int torture_rtmutex_lock(void) __acquires(torture_rtmutex) 


static void torture_rtmutex_boost(struct torture_random_state *trsp)

{

	int policy;

	struct sched_param param;

	const unsigned int factor = 50000; /* yes, quite arbitrary */



	if (!rt_task(current)) {
@@ -448,8 +446,7 @@ static void torture_rtmutex_boost(struct torture_random_state *trsp) 
		 */

		if (trsp && !(torture_random(trsp) %

			      (cxt.nrealwriters_stress * factor))) {

			policy = SCHED_FIFO;

			param.sched_priority = MAX_RT_PRIO - 1;

			sched_set_fifo(current);

		} else /* common case, do nothing */

			return;

	} else {
@@ -462,13 +459,10 @@ static void torture_rtmutex_boost(struct torture_random_state *trsp) 
		 */

		if (!trsp || !(torture_random(trsp) %

			       (cxt.nrealwriters_stress * factor * 2))) {

			policy = SCHED_NORMAL;

			param.sched_priority = 0;

			sched_set_normal(current, 0);

		} else /* common case, do nothing */

			return;

	}



	sched_setscheduler_nocheck(current, policy, &param);

}



static void torture_rtmutex_delay(struct torture_random_state *trsp)

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