From b3e76cc3244ac139fc75750c5af9edbb9f191a10 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Mon, 23 Apr 2007 21:08:08 +0200 Subject: [PATCH] [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: Christoph Hellwig Acked-by: Jeremy Kerr Signed-off-by: Arnd Bergmann --- arch/powerpc/platforms/cell/spufs/sched.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index 003e330..5149dff 100644 --- a/arch/powerpc/platforms/cell/spufs/sched.c +++ b/arch/powerpc/platforms/cell/spufs/sched.c @@ -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); } -- 1.8.2.3