diff options
| author | Christoph Hellwig <hch@lst.de> | 2007-04-23 21:08:08 +0200 |
|---|---|---|
| committer | Arnd Bergmann <arnd@klappe.arndb.de> | 2007-04-23 21:18:53 +0200 |
| commit | b3e76cc3244ac139fc75750c5af9edbb9f191a10 (patch) | |
| tree | e4d743216dceb19155ea0f374ee445e9a6a8a7e7 /arch | |
| parent | 43c2bbd932b66403688f3d812065d82f8fb8f4b3 (diff) | |
[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 <hch@lst.de>
Acked-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/powerpc/platforms/cell/spufs/sched.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c index 003e330fc76f..5149dff65c9e 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); } |