sched: undo some of the recent changes

undo some of the recent changes that are not needed after all,
such as last_min_vruntime.

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

diff --git a/include/linux/sched.h b/include/linux/sched.h
index d74830c..2c33227 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -908,7 +908,6 @@ struct sched_entity {
        u64                     sum_exec_runtime;
        u64                     vruntime;
        u64                     prev_sum_exec_runtime;
-       u64                     last_min_vruntime;
 
 #ifdef CONFIG_SCHEDSTATS
        u64                     wait_start;

diff --git a/kernel/sched.c b/kernel/sched.c
index c779bf9..744bd50 100644 (file)
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -1616,7 +1616,6 @@ static void __sched_fork(struct task_struct *p)
        p->se.exec_start                = 0;
        p->se.sum_exec_runtime          = 0;
        p->se.prev_sum_exec_runtime     = 0;
-       p->se.last_min_vruntime         = 0;
 
 #ifdef CONFIG_SCHEDSTATS
        p->se.wait_start                = 0;

diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 0228de1..62a9ee8 100644 (file)
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -480,14 +480,9 @@ place_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int initial)
                vruntime += __sched_vslice(cfs_rq->nr_running + 1);
 
        if (!initial) {
-               if (sched_feat(NEW_FAIR_SLEEPERS)) {
-                       s64 latency = cfs_rq->min_vruntime - se->vruntime;
-                       if (latency < 0 || !cfs_rq->nr_running)
-                               latency = 0;
-                       else
-                               latency = min_t(s64, latency, sysctl_sched_latency);
-                       vruntime -= latency;
-               }
+               if (sched_feat(NEW_FAIR_SLEEPERS))
+                       vruntime -= sysctl_sched_latency;
+
                vruntime = max(vruntime, se->vruntime);
        }
 
@@ -531,8 +526,6 @@ dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int sleep)
                                se->block_start = rq_of(cfs_rq)->clock;
                }
 #endif
-               /* se->vruntime = entity_key(cfs_rq, se); */
-               se->last_min_vruntime = cfs_rq->min_vruntime;
        }
 
        if (se != cfs_rq->curr)