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authorPeter Zijlstra <a.p.zijlstra@chello.nl>2009-01-28 14:51:38 +0100
committerIngo Molnar <mingo@elte.hu>2009-02-01 10:49:49 +0100
commit1596e29773eadd96b0a5fc6e736afa52394cafda (patch)
tree997c29116e33b5a0ff60b4950ff40d75cfeef526 /kernel
parentd942fb6c7d391baba3dddb566eb735fbf3df8528 (diff)
downloadop-kernel-dev-1596e29773eadd96b0a5fc6e736afa52394cafda.zip
op-kernel-dev-1596e29773eadd96b0a5fc6e736afa52394cafda.tar.gz
sched: symmetric sync vs avg_overlap
Reinstate the weakening of the sync hint if set. This yields a more symmetric usage of avg_overlap. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/kernel/sched.c b/kernel/sched.c
index 770b1f9..242d0d4 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -2266,9 +2266,15 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync)
if (!sched_feat(SYNC_WAKEUPS))
sync = 0;
- if (!sync && (current->se.avg_overlap < sysctl_sched_migration_cost &&
- p->se.avg_overlap < sysctl_sched_migration_cost))
- sync = 1;
+ if (!sync) {
+ if (current->se.avg_overlap < sysctl_sched_migration_cost &&
+ p->se.avg_overlap < sysctl_sched_migration_cost)
+ sync = 1;
+ } else {
+ if (current->se.avg_overlap >= sysctl_sched_migration_cost ||
+ p->se.avg_overlap >= sysctl_sched_migration_cost)
+ sync = 0;
+ }
#ifdef CONFIG_SMP
if (sched_feat(LB_WAKEUP_UPDATE)) {
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