--- linux-2.6.7-rc3-ck0/kernel/sched.c	2004-06-10 23:47:01.000000000 +1000
+++ linux-2.6.7-rc3-s6.8/kernel/sched.c	2004-06-11 01:20:48.628678879 +1000
@@ -192,8 +192,8 @@ static int task_preempts_curr(struct tas
 {
 	if (p->prio >= rq->curr->prio)
 		return 0;
-	if (rq->cache_ticks >= cache_decay_ticks || !compute ||
-		rt_task(p) || rq->curr == rq->idle)
+	if (!compute || rq->cache_ticks >= cache_decay_ticks ||
+		rt_task(p) || !p->mm || rq->curr == rq->idle)
 			return 1;
 	rq->preempted = 1;
 		return 0;