From 3105b86a9fee7d2c2e76edb53bbbc4027599628f Mon Sep 17 00:00:00 2001
From: Mel Gorman <mgorman@suse.de>
Date: Fri, 23 Nov 2012 11:23:49 +0000
Subject: [PATCH] mm: sched: numa: Control enabling and disabling of NUMA
 balancing if !SCHED_DEBUG

The "mm: sched: numa: Control enabling and disabling of NUMA balancing"
depends on scheduling debug being enabled but it's perfectly legimate to
disable automatic NUMA balancing even without this option. This should
take care of it.

Signed-off-by: Mel Gorman <mgorman@suse.de>
---
 kernel/sched/core.c  | 9 +++++++++
 kernel/sched/sched.h | 8 +++++++-
 2 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index 7a45015274ab..2a46f4407414 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1558,6 +1558,7 @@ static void __sched_fork(struct task_struct *p)
 }
 
 #ifdef CONFIG_NUMA_BALANCING
+#ifdef CONFIG_SCHED_DEBUG
 void set_numabalancing_state(bool enabled)
 {
 	if (enabled)
@@ -1565,6 +1566,14 @@ void set_numabalancing_state(bool enabled)
 	else
 		sched_feat_set("NO_NUMA");
 }
+#else
+__read_mostly bool numabalancing_enabled;
+
+void set_numabalancing_state(bool enabled)
+{
+	numabalancing_enabled = enabled;
+}
+#endif /* CONFIG_SCHED_DEBUG */
 #endif /* CONFIG_NUMA_BALANCING */
 
 /*
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index ae31c051ff2f..4f93d031875a 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -650,9 +650,15 @@ extern struct static_key sched_feat_keys[__SCHED_FEAT_NR];
 
 #ifdef CONFIG_NUMA_BALANCING
 #define sched_feat_numa(x) sched_feat(x)
+#ifdef CONFIG_SCHED_DEBUG
+#define numabalancing_enabled sched_feat_numa(NUMA)
+#else
+extern bool numabalancing_enabled;
+#endif /* CONFIG_SCHED_DEBUG */
 #else
 #define sched_feat_numa(x) (0)
-#endif
+#define numabalancing_enabled (0)
+#endif /* CONFIG_NUMA_BALANCING */
 
 static inline u64 global_rt_period(void)
 {
-- 
GitLab