---

yaml
---
r: 69031
b: refs/heads/master
c: 94dfb5e
h: refs/heads/master
i:
  69029: 905a926
  69027: 0fae0d9
  69023: 77ba2da
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 28a1f6fa2f7ecec7e5da28b03a24abbecbd2e864
+refs/heads/master: 94dfb5e75ef59068a8cf68fa6e18f25ebdcd20b9

trunk/kernel/sched.c

@@ -399,14 +399,18 @@ enum {
 	SCHED_FEAT_SLEEPER_AVG		= 4,
 	SCHED_FEAT_SLEEPER_LOAD_AVG	= 8,
 	SCHED_FEAT_START_DEBIT		= 16,
+	SCHED_FEAT_USE_TREE_AVG         = 32,
+	SCHED_FEAT_APPROX_AVG           = 64,
 };
 
 const_debug unsigned int sysctl_sched_features =
 		SCHED_FEAT_FAIR_SLEEPERS	*0 |
 		SCHED_FEAT_NEW_FAIR_SLEEPERS	*1 |
 		SCHED_FEAT_SLEEPER_AVG		*0 |
 		SCHED_FEAT_SLEEPER_LOAD_AVG	*1 |
-		SCHED_FEAT_START_DEBIT		*1;
+		SCHED_FEAT_START_DEBIT		*1 |
+		SCHED_FEAT_USE_TREE_AVG		*0 |
+		SCHED_FEAT_APPROX_AVG		*0;
 
 #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
 

trunk/kernel/sched_fair.c

@@ -547,16 +547,22 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
 static void
 place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 {
-	struct sched_entity *last = __pick_last_entity(cfs_rq);
 	u64 min_runtime, latency;
 
 	min_runtime = cfs_rq->min_vruntime;
-	if (last) {
-		min_runtime += last->vruntime;
-		min_runtime >>= 1;
-		if (initial && sched_feat(START_DEBIT))
-			min_runtime += sysctl_sched_latency/2;
-	}
+
+	if (sched_feat(USE_TREE_AVG)) {
+		struct sched_entity *last = __pick_last_entity(cfs_rq);
+		if (last) {
+			min_runtime = __pick_next_entity(cfs_rq)->vruntime;
+			min_runtime += last->vruntime;
+			min_runtime >>= 1;
+		}
+	} else if (sched_feat(APPROX_AVG))
+		min_runtime += sysctl_sched_latency/2;
+
+	if (initial && sched_feat(START_DEBIT))
+		min_runtime += sched_slice(cfs_rq, se);
 
 	if (!initial && sched_feat(NEW_FAIR_SLEEPERS)) {
 		latency = sysctl_sched_latency;