Commit 7b31e940 authored Apr 21, 2020 by Peter Zijlstra

sched,drm/scheduler: 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.

In this case, use fifo_low, because it only cares about being above
SCHED_NORMAL. Effectively no change in behaviour.

Cc: alexander.deucher@amd.com
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>

parent 64419ca6

drivers/gpu/drm/scheduler/sched_main.c

+1 −2

Original line number	Diff line number	Diff line
		@@ -760,11 +760,10 @@ static bool drm_sched_blocked(struct drm_gpu_scheduler *sched)
		*/
		static int drm_sched_main(void *param)
		{
		struct sched_param sparam = {.sched_priority = 1};
		struct drm_gpu_scheduler sched = (struct drm_gpu_scheduler )param;
		int r;

		sched_setscheduler(current, SCHED_FIFO, &sparam);
		sched_set_fifo_low(current);

		while (!kthread_should_stop()) {
		struct drm_sched_entity *entity = NULL;

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