From: Ingo Molnar <mingo@elte.hu>
Date: Mon, 15 Oct 2007 15:00:11 +0000 (+0200)
Subject: sched: entity_key() fix
X-Git-Tag: v3.12-rc1~26303^2~75
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8465e792e82c567b80358e38732164b770ed4b7f;p=kernel%2Fkernel-generic.git

sched: entity_key() fix

entity_key() fix - we'd occasionally end up with a 0 vruntime
in the !initial case.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 8ea4c9b..926491f 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -479,13 +479,16 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
 	if (initial && sched_feat(START_DEBIT))
 		vruntime += __sched_vslice(cfs_rq->nr_running + 1);
 
-	if (!initial && sched_feat(NEW_FAIR_SLEEPERS)) {
-		s64 latency = cfs_rq->min_vruntime - se->last_min_vruntime;
-		if (latency < 0 || !cfs_rq->nr_running)
-			latency = 0;
-		else
-			latency = min_t(s64, latency, sysctl_sched_latency);
-		vruntime -= latency;
+	if (!initial) {
+		if (sched_feat(NEW_FAIR_SLEEPERS)) {
+			s64 latency = cfs_rq->min_vruntime - se->last_min_vruntime;
+			if (latency < 0 || !cfs_rq->nr_running)
+				latency = 0;
+			else
+				latency = min_t(s64, latency, sysctl_sched_latency);
+			vruntime -= latency;
+		}
+		vruntime = max(vruntime, se->vruntime);
 	}
 
 	se->vruntime = vruntime;