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sched: remove SCHED_FEAT_SKIP_INITIAL

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remove SCHED_FEAT_SKIP_INITIAL - it was off by default and even
when enabled it never made any real difference.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2007-10-15 17:00:05 +02:00
parent 67e12eac32
commit 28a1f6fa2f
2 changed files with 1 additions and 10 deletions
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4
kernel/sched.c
View File

@ -399,7 +399,6 @@ enum {
SCHED_FEAT_SLEEPER_AVG = 4, SCHED_FEAT_SLEEPER_AVG = 4,
SCHED_FEAT_SLEEPER_LOAD_AVG = 8, SCHED_FEAT_SLEEPER_LOAD_AVG = 8,
SCHED_FEAT_START_DEBIT = 16, SCHED_FEAT_START_DEBIT = 16,
SCHED_FEAT_SKIP_INITIAL = 32,
}; };
const_debug unsigned int sysctl_sched_features = const_debug unsigned int sysctl_sched_features =
@ -407,8 +406,7 @@ const_debug unsigned int sysctl_sched_features =
SCHED_FEAT_NEW_FAIR_SLEEPERS *1 | SCHED_FEAT_NEW_FAIR_SLEEPERS *1 |
SCHED_FEAT_SLEEPER_AVG *0 | SCHED_FEAT_SLEEPER_AVG *0 |
SCHED_FEAT_SLEEPER_LOAD_AVG *1 | SCHED_FEAT_SLEEPER_LOAD_AVG *1 |
SCHED_FEAT_START_DEBIT *1 | SCHED_FEAT_START_DEBIT *1;
SCHED_FEAT_SKIP_INITIAL *0;
#define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x) #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)

7
kernel/sched_fair.c
View File

@ -1063,13 +1063,6 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
update_curr(cfs_rq); update_curr(cfs_rq);
place_entity(cfs_rq, se, 1); place_entity(cfs_rq, se, 1);
/*
* The first wait is dominated by the child-runs-first logic,
* so do not credit it with that waiting time yet:
*/
if (sched_feat(SKIP_INITIAL))
se->wait_start_fair = 0;
/* /*
* The statistical average of wait_runtime is about * The statistical average of wait_runtime is about
* -granularity/2, so initialize the task with that: * -granularity/2, so initialize the task with that: