---

yaml
---
r: 135705
b: refs/heads/master
c: df1c99d
h: refs/heads/master
i:
  135703: e78b4c5
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 57310a98a354e84279d7c8af2f48805a62372e53
+refs/heads/master: df1c99d416500da8d26a4d78777467c53ee7689e

trunk/kernel/sched.c

@@ -4620,6 +4620,28 @@ static inline void schedule_debug(struct task_struct *prev)
 #endif
 }
 
+static void put_prev_task(struct rq *rq, struct task_struct *prev)
+{
+	if (prev->state == TASK_RUNNING) {
+		u64 runtime = prev->se.sum_exec_runtime;
+
+		runtime -= prev->se.prev_sum_exec_runtime;
+		runtime = min_t(u64, runtime, 2*sysctl_sched_migration_cost);
+
+		/*
+		 * In order to avoid avg_overlap growing stale when we are
+		 * indeed overlapping and hence not getting put to sleep, grow
+		 * the avg_overlap on preemption.
+		 *
+		 * We use the average preemption runtime because that
+		 * correlates to the amount of cache footprint a task can
+		 * build up.
+		 */
+		update_avg(&prev->se.avg_overlap, runtime);
+	}
+	prev->sched_class->put_prev_task(rq, prev);
+}
+
 /*
  * Pick up the highest-prio task:
  */
@@ -4698,7 +4720,7 @@ asmlinkage void __sched schedule(void)
 	if (unlikely(!rq->nr_running))
 		idle_balance(cpu, rq);
 
-	prev->sched_class->put_prev_task(rq, prev);
+	put_prev_task(rq, prev);
 	next = pick_next_task(rq);
 
 	if (likely(prev != next)) {