sched: remove SCHED_FEAT_SKIP_INITIAL

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>

diff --git a/kernel/sched.c b/kernel/sched.c
index 5594e65..bf85b4b 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -399,7 +399,6 @@ enum {
        SCHED_FEAT_SLEEPER_AVG          = 4,
        SCHED_FEAT_SLEEPER_LOAD_AVG     = 8,
        SCHED_FEAT_START_DEBIT          = 16,
-       SCHED_FEAT_SKIP_INITIAL         = 32,
 };
 
 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_SLEEPER_AVG          *0 |
                SCHED_FEAT_SLEEPER_LOAD_AVG     *1 |
-               SCHED_FEAT_START_DEBIT          *1 |
-               SCHED_FEAT_SKIP_INITIAL         *0;
+               SCHED_FEAT_START_DEBIT          *1;
 
 #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
 

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index cc447fb..c8c6b05 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1064,13 +1064,6 @@ static void task_new_fair(struct rq *rq, struct task_struct *p)
        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
         * -granularity/2, so initialize the task with that:
         */