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| author | Ingo Molnar <mingo@elte.hu> | 2007-12-04 17:04:39 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2007-12-04 17:04:39 +0100 |
| commit | db292ca302e83534f5f0f7139e13d7e6976e51f9 (patch) | |
| tree | 5d217514330e447b82f07601cdc87e6fd135d76b /kernel | |
| parent | 77034937dc4575ca0a76bf209838ecd39e804089 (diff) | |
| download | lwn-db292ca302e83534f5f0f7139e13d7e6976e51f9.tar.gz lwn-db292ca302e83534f5f0f7139e13d7e6976e51f9.zip | |
sched: default to more agressive yield for SCHED_BATCH tasks
do more agressive yield for SCHED_BATCH tuned tasks: they are all
about throughput anyway. This allows a gentler migration path for
any apps that relied on stronger yield.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/sched_fair.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c index 37bb265598db..c33f0ceb3de9 100644 --- a/kernel/sched_fair.c +++ b/kernel/sched_fair.c @@ -799,8 +799,9 @@ static void dequeue_task_fair(struct rq *rq, struct task_struct *p, int sleep) */ static void yield_task_fair(struct rq *rq) { - struct cfs_rq *cfs_rq = task_cfs_rq(rq->curr); - struct sched_entity *rightmost, *se = &rq->curr->se; + struct task_struct *curr = rq->curr; + struct cfs_rq *cfs_rq = task_cfs_rq(curr); + struct sched_entity *rightmost, *se = &curr->se; /* * Are we the only task in the tree? @@ -808,7 +809,7 @@ static void yield_task_fair(struct rq *rq) if (unlikely(cfs_rq->nr_running == 1)) return; - if (likely(!sysctl_sched_compat_yield)) { + if (likely(!sysctl_sched_compat_yield) && curr->policy != SCHED_BATCH) { __update_rq_clock(rq); /* * Update run-time statistics of the 'current'. |