diff options
Diffstat (limited to 'kernel/sched.c')
-rw-r--r-- | kernel/sched.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/kernel/sched.c b/kernel/sched.c index d8456a9ac9af..263e25e10204 100644 --- a/kernel/sched.c +++ b/kernel/sched.c | |||
@@ -627,6 +627,7 @@ enum { | |||
627 | SCHED_FEAT_START_DEBIT = 4, | 627 | SCHED_FEAT_START_DEBIT = 4, |
628 | SCHED_FEAT_HRTICK = 8, | 628 | SCHED_FEAT_HRTICK = 8, |
629 | SCHED_FEAT_DOUBLE_TICK = 16, | 629 | SCHED_FEAT_DOUBLE_TICK = 16, |
630 | SCHED_FEAT_SYNC_WAKEUPS = 32, | ||
630 | }; | 631 | }; |
631 | 632 | ||
632 | const_debug unsigned int sysctl_sched_features = | 633 | const_debug unsigned int sysctl_sched_features = |
@@ -634,7 +635,8 @@ const_debug unsigned int sysctl_sched_features = | |||
634 | SCHED_FEAT_WAKEUP_PREEMPT * 1 | | 635 | SCHED_FEAT_WAKEUP_PREEMPT * 1 | |
635 | SCHED_FEAT_START_DEBIT * 1 | | 636 | SCHED_FEAT_START_DEBIT * 1 | |
636 | SCHED_FEAT_HRTICK * 1 | | 637 | SCHED_FEAT_HRTICK * 1 | |
637 | SCHED_FEAT_DOUBLE_TICK * 0; | 638 | SCHED_FEAT_DOUBLE_TICK * 0 | |
639 | SCHED_FEAT_SYNC_WAKEUPS * 0; | ||
638 | 640 | ||
639 | #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x) | 641 | #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x) |
640 | 642 | ||
@@ -1916,6 +1918,9 @@ static int try_to_wake_up(struct task_struct *p, unsigned int state, int sync) | |||
1916 | long old_state; | 1918 | long old_state; |
1917 | struct rq *rq; | 1919 | struct rq *rq; |
1918 | 1920 | ||
1921 | if (!sched_feat(SYNC_WAKEUPS)) | ||
1922 | sync = 0; | ||
1923 | |||
1919 | smp_wmb(); | 1924 | smp_wmb(); |
1920 | rq = task_rq_lock(p, &flags); | 1925 | rq = task_rq_lock(p, &flags); |
1921 | old_state = p->state; | 1926 | old_state = p->state; |