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Commit b3e76cc3 authored by Christoph Hellwig's avatar Christoph Hellwig Committed by Arnd Bergmann
Browse files

[POWERPC] spu sched: ensure preempted threads are put back on the runqueue 



To not lose a spu thread we need to make sure it always gets put back
on the runqueue.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Acked-by: default avatarJeremy Kerr <jk@ozlabs.org>
Signed-off-by: default avatarArnd Bergmann <arnd.bergmann@de.ibm.com>
parent 43c2bbd9

arch/powerpc/platforms/cell/spufs/sched.c

+10 −3
Original line number Diff line number Diff line
@@ -97,7 +97,7 @@ void spu_sched_tick(struct work_struct *work) 
	struct spu_context *ctx =

		container_of(work, struct spu_context, sched_work.work);

	struct spu *spu;

	int rearm = 1;

	int preempted = 0;



	/*

	 * If this context is being stopped avoid rescheduling from the
@@ -113,12 +113,19 @@ void spu_sched_tick(struct work_struct *work) 
		int best = sched_find_first_bit(spu_prio->bitmap);

		if (best <= ctx->prio) {

			spu_deactivate(ctx);

			rearm = 0;

			preempted = 1;

		}

	}

	mutex_unlock(&ctx->state_mutex);



	if (rearm)

	if (preempted) {

		/*

		 * We need to break out of the wait loop in spu_run manually

		 * to ensure this context gets put on the runqueue again

		 * ASAP.

		 */

		wake_up(&ctx->stop_wq);

	} else

		spu_start_tick(ctx);

}