[tip:sched/core] sched: Split WAKEUP_OVERLAP

tip-bot for Peter Zijlstra
2009-09-16T10:19:44Z

Commit-ID: e6b1b2c9c0461c4e0971ed905ce3cda6512ee82a
Gitweb: http://git.kernel.org/tip/e6b1b2c9c0461c4e0971ed905ce3cda6512ee82a
Author: Peter Zijlstra <a.p.zijlstra@chello.nl>
AuthorDate: Fri, 11 Sep 2009 11:59:22 +0200
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Tue, 15 Sep 2009 16:01:02 +0200

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>

---
kernel/sched_fair.c | 7 ++++---
kernel/sched_features.h | 1 +
2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index aa7f841..cea5b82 100644
--- 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
--- 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)