--- linux-2.6.4-s5/kernel/sched.c	2004-03-30 19:41:45.862173660 +1000
+++ linux-2.6.4-stair5.2/kernel/sched.c	2004-03-30 19:41:23.321737821 +1000
@@ -289,6 +289,8 @@ static inline void activate_task(task_t 
 	unsigned long long now = sched_clock();
 	unsigned long run_time, sleep_time;
 	unsigned int full_slice = slice(p);
+	p->slice = full_slice;
+	
 	if (likely(!rt_task(p))) {
 		/*
 		 * This ensures that tasks running for less than one tick are
@@ -302,19 +304,17 @@ static inline void activate_task(task_t 
 		run_time = NS_TO_JIFFIES(p->runtime);
 		
 		if (unlikely(run_time >= full_slice)) {
-			p->slice = full_slice;
+			if (p->deadline)
+				p->deadline--;
 			p->runtime = 0;
-		} else if (run_time) {
-			p->slice = full_slice - run_time;
-			p->prio = apparent_prio(p);
 		} else {
-			p->slice = full_slice;
-			if (p->deadline < deadline(p))
+			if (run_time) 
+				p->slice -= run_time;
+			else if (p->deadline < deadline(p))
 				p->deadline++;
-			p->prio = effective_prio(p);
 		}
-	} else
-		p->slice = full_slice;
+	}
+	p->prio = effective_prio(p);
 	p->time_slice = first_time_slice(p);
 	p->timestamp = now;
 	__activate_task(p, rq);