From: bsegall@google.com <bsegall@google.com>
Date: Tue, 16 Jun 2015 19:18:21 +0000 (-0700)
Subject: sched/numa: Check sched_feat(NUMA) in migrate_improves_locality()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6dfec8d9493f48a42896386b41ec1a4644331b0b;p=linux-beck.git

sched/numa: Check sched_feat(NUMA) in migrate_improves_locality()

migrate_improves_locality checked sched_feat(NUMA_FAVOUR_HIGHER) but not
sched_feat(NUMA), so disabling just the NUMA feature would leave it
working off of old data.

Signed-off-by: Ben Segall <bsegall@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/xm26si9rtqbm.fsf@sword-of-the-dawn.mtv.corp.google.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index d113c3ba8bc4..98b2b961df33 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -5680,8 +5680,8 @@ static bool migrate_improves_locality(struct task_struct *p, struct lb_env *env)
 	unsigned long src_faults, dst_faults;
 	int src_nid, dst_nid;
 
-	if (!sched_feat(NUMA_FAVOUR_HIGHER) || !p->numa_faults ||
-	    !(env->sd->flags & SD_NUMA)) {
+	if (!sched_feat(NUMA) || !sched_feat(NUMA_FAVOUR_HIGHER) ||
+	    !p->numa_faults || !(env->sd->flags & SD_NUMA)) {
 		return false;
 	}