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| author | Yong Zhang <yong.zhang0@gmail.com> | 2011-07-29 16:20:33 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-08-14 12:00:41 +0200 |
| commit | 2c2efaed9bc973e3aeab1385c618017b56c8f6d7 (patch) | |
| tree | 2a401b92c58c8aa8a40dafc513fb6be42f92c80a | |
| parent | e2b245f89ee3f5b03fb42d843a79a58cf4773181 (diff) | |
| download | blackbird-op-linux-2c2efaed9bc973e3aeab1385c618017b56c8f6d7.tar.gz blackbird-op-linux-2c2efaed9bc973e3aeab1385c618017b56c8f6d7.zip | |
sched: Kill WAKEUP_PREEMPT
Remove the WAKEUP_PREEMPT feature, disabling it doesn't make any sense
and its outlived its use by a long long while.
Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110729082033.GB12106@zhy
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | kernel/sched_fair.c | 9 | ||||
| -rw-r--r-- | kernel/sched_features.h | 5 |
2 files changed, 1 insertions, 13 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index bc8ee9993814..241fc86bc613 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -1095,9 +1095,6 @@ check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) * narrow margin doesn't have to wait for a full slice. * This also mitigates buddy induced latencies under load. */ - if (!sched_feat(WAKEUP_PREEMPT)) - return; - if (delta_exec < sysctl_sched_min_granularity) return; @@ -1233,7 +1230,7 @@ entity_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr, int queued) return; #endif - if (cfs_rq->nr_running > 1 || !sched_feat(WAKEUP_PREEMPT)) + if (cfs_rq->nr_running > 1) check_preempt_tick(cfs_rq, curr); } @@ -1899,10 +1896,6 @@ static void check_preempt_wakeup(struct rq *rq, struct task_struct *p, int wake_ if (unlikely(p->policy != SCHED_NORMAL)) return; - - if (!sched_feat(WAKEUP_PREEMPT)) - return; - find_matching_se(&se, &pse); update_curr(cfs_rq_of(se)); BUG_ON(!pse); diff --git a/kernel/sched_features.h b/kernel/sched_features.h index 2e74677cb040..efa0a7b75dde 100644 --- a/kernel/sched_features.h +++ b/kernel/sched_features.h @@ -12,11 +12,6 @@ SCHED_FEAT(GENTLE_FAIR_SLEEPERS, 1) SCHED_FEAT(START_DEBIT, 1) /* - * Should wakeups try to preempt running tasks. - */ -SCHED_FEAT(WAKEUP_PREEMPT, 1) - -/* * Based on load and program behaviour, see if it makes sense to place * a newly woken task on the same cpu as the task that woke it -- * improve cache locality. Typically used with SYNC wakeups as |
