sched: Split WAKEUP_OVERLAP

It consists of two conditions, split them out in separate toggles
so we can test them independently.

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

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index aa7f841..cea5b82 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1526,9 +1526,10 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int sync)
        if (!sched_feat(WAKEUP_PREEMPT))
                return;
 
-       if (sched_feat(WAKEUP_OVERLAP) && (sync ||
-                       (se->avg_overlap < sysctl_sched_migration_cost &&
-                        pse->avg_overlap < sysctl_sched_migration_cost))) {
+       if ((sched_feat(WAKEUP_SYNC) && sync) ||
+           (sched_feat(WAKEUP_OVERLAP) &&
+            (se->avg_overlap < sysctl_sched_migration_cost &&
+             pse->avg_overlap < sysctl_sched_migration_cost))) {
                resched_task(curr);
                return;
        }

diff --git a/kernel/sched_features.h b/kernel/sched_features.h
index e2dc63a..07c8250 100644 (file)
--- a/kernel/sched_features.h
+++ b/kernel/sched_features.h
@@ -12,6 +12,7 @@ SCHED_FEAT(ASYM_GRAN, 1)
 SCHED_FEAT(LB_BIAS, 1)
 SCHED_FEAT(LB_WAKEUP_UPDATE, 1)
 SCHED_FEAT(ASYM_EFF_LOAD, 1)
+SCHED_FEAT(WAKEUP_SYNC, 0)
 SCHED_FEAT(WAKEUP_OVERLAP, 0)
 SCHED_FEAT(LAST_BUDDY, 1)
 SCHED_FEAT(OWNER_SPIN, 1)