Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=b3e76cc3244ac139fc75750c5af9edbb9f191a10
Commit: b3e76cc3244ac139fc75750c5af9edbb9f191a10
Parent: 43c2bbd932b66403688f3d812065d82f8fb8f4b3
Author: Christoph Hellwig <[EMAIL PROTECTED]>
AuthorDate: Mon Apr 23 21:08:08 2007 +0200
Committer: Arnd Bergmann <[EMAIL PROTECTED]>
CommitDate: Mon Apr 23 21:18:53 2007 +0200
[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 <[EMAIL PROTECTED]>
Acked-by: Jeremy Kerr <[EMAIL PROTECTED]>
Signed-off-by: Arnd Bergmann <[EMAIL PROTECTED]>
---
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 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);
}
-
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