sched: old sleeper bonus

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 8 insertions, 3 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index 521b89b01480..070eefdd90f5 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -680,6 +680,7 @@ enum {
         SCHED_FEAT_SYNC_WAKEUPS         = 32,
         SCHED_FEAT_HRTICK               = 64,
         SCHED_FEAT_DOUBLE_TICK          = 128,
+        SCHED_FEAT_NORMALIZED_SLEEPER   = 256,
 };
 
 const_debug unsigned int sysctl_sched_features =
@@ -690,7 +691,8 @@ const_debug unsigned int sysctl_sched_features =
                 SCHED_FEAT_CACHE_HOT_BUDDY      * 1 |
                 SCHED_FEAT_SYNC_WAKEUPS         * 1 |
                 SCHED_FEAT_HRTICK               * 1 |
-                SCHED_FEAT_DOUBLE_TICK          * 0;
+                SCHED_FEAT_DOUBLE_TICK          * 0 |
+                SCHED_FEAT_NORMALIZED_SLEEPER   * 1;
 
 #define sched_feat(x) (sysctl_sched_features & SCHED_FEAT_##x)
 
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 290cf770b712..022e036f2c3e 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -501,8 +501,11 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
         if (!initial) {
                 /* sleeps upto a single latency don't count. */
                 if (sched_feat(NEW_FAIR_SLEEPERS)) {
-                        vruntime -= calc_delta_fair(sysctl_sched_latency,
-                                                    &cfs_rq->load);
+                        if (sched_feat(NORMALIZED_SLEEPER))
+                                vruntime -= calc_delta_fair(sysctl_sched_latency,
+                                                &cfs_rq->load);
+                        else
+                                vruntime -= sysctl_sched_latency;
                 }
 
                 /* ensure we never gain time by being placed backwards. */