From: Christoph Hellwig <hch@lst.de>
Date: Mon, 23 Apr 2007 19:08:09 +0000 (+0200)
Subject: [POWERPC] spu sched: ensure preempted threads are put back on the runqueue, part2
X-Git-Tag: v2.6.22-rc1~1109^2~72^2~20
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e097b513285e616215b23af234d127298bb8d89a;p=linux-2.6

[POWERPC] spu sched: ensure preempted threads are put back on the runqueue, part2

To not lose a spu thread we need to make sure it always gets put back
on the runqueue.  In find_victim aswell as in the scheduler tick as done
in the previous patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
---

diff --git a/arch/powerpc/platforms/cell/spufs/sched.c b/arch/powerpc/platforms/cell/spufs/sched.c
index 5149dff65c..405a0555d7 100644
--- a/arch/powerpc/platforms/cell/spufs/sched.c
+++ b/arch/powerpc/platforms/cell/spufs/sched.c
@@ -391,6 +391,12 @@ static struct spu *find_victim(struct spu_context *ctx)
 			}
 			spu_unbind_context(spu, victim);
 			mutex_unlock(&victim->state_mutex);
+			/*
+			 * 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(&victim->stop_wq);
 			return spu;
 		}
 	}