sched: Introduce temporary FAIR_GROUP_SCHED dependency for load-tracking

[deliverable/linux.git] / kernel / sched / core.c

diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index f26860074ef2ba59062370cf9c908c684b53534b..5dae0d252ff7728f4a0a7e8e30ac2c089f8a3ec7 100644 (file)
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -1526,7 +1526,12 @@ static void __sched_fork(struct task_struct *p)
        p->se.vruntime                  = 0;
        INIT_LIST_HEAD(&p->se.group_node);
 
-#ifdef CONFIG_SMP
+/*
+ * Load-tracking only depends on SMP, FAIR_GROUP_SCHED dependency below may be
+ * removed when useful for applications beyond shares distribution (e.g.
+ * load-balance).
+ */
+#if defined(CONFIG_SMP) && defined(CONFIG_FAIR_GROUP_SCHED)
        p->se.avg.runnable_avg_period = 0;
        p->se.avg.runnable_avg_sum = 0;
 #endif