From: Lin Ming <ming.m.lin@intel.com>
Date: Thu, 15 Jan 2009 16:17:15 +0000 (+0100)
Subject: sched: sched_slice() fixlet
X-Git-Tag: v2.6.29-rc2~9^2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=6272d68cc6a5f90c6b1a2228cf0f67b895305d17;p=platform%2Fkernel%2Flinux-3.10.git

sched: sched_slice() fixlet

Mike's change: 0a582440f "sched: fix sched_slice())" broke group
scheduling by forgetting to reload cfs_rq on each loop.

This patch fixes aim7 regression and specjbb2005 regression becomes
less than 1.5% on 8-core stokley.

Signed-off-by: Lin Ming <ming.m.lin@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Tested-by: Jayson King <dev@jaysonking.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 16b419b..5cc1c16 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -429,7 +429,10 @@ static u64 sched_slice(struct cfs_rq *cfs_rq, struct sched_entity *se)
 	u64 slice = __sched_period(cfs_rq->nr_running + !se->on_rq);
 
 	for_each_sched_entity(se) {
-		struct load_weight *load = &cfs_rq->load;
+		struct load_weight *load;
+
+		cfs_rq = cfs_rq_of(se);
+		load = &cfs_rq->load;
 
 		if (unlikely(!se->on_rq)) {
 			struct load_weight lw = cfs_rq->load;