[Cbe-oss-dev] PATCH [8/7] spu_find_victim may chose wrong context to preempt

[Luke Browning]

Need to re-check priority after dropping lock.  Otherwise, a
more favored context may be preempted.

Signed-off-by: Luke Browning <lukebr at linux.vnet.ibm.com>

---

Index: linux-2.6.22/arch/powerpc/platforms/cell/spufs/sched.c
===================================================================
--- linux-2.6.22.orig/arch/powerpc/platforms/cell/spufs/sched.c
+++ linux-2.6.22/arch/powerpc/platforms/cell/spufs/sched.c
@@ -652,10 +652,10 @@ static struct spu *find_victim(struct sp
 			}
 
 			spu = victim->spu;
-			if (!spu) {
+			if (!spu || victim->prio <= ctx->prio) {
 				/*
 				 * This race can happen because we've dropped
-				 * the active list mutex.  No a problem, just
+				 * the active list mutex.  Not a problem, just
 				 * restart the search.
 				 */
 				mutex_unlock(&victim->state_mutex);