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-rw-r--r--kernel/sched_fair.c27
1 files changed, 13 insertions, 14 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 4e777b4..c32c3e6 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -861,12 +861,21 @@ wakeup_preempt_entity(struct sched_entity *curr, struct sched_entity *se);
static struct sched_entity *pick_next_entity(struct cfs_rq *cfs_rq)
{
struct sched_entity *se = __pick_next_entity(cfs_rq);
+ struct sched_entity *buddy;
- if (cfs_rq->next && wakeup_preempt_entity(cfs_rq->next, se) < 1)
- return cfs_rq->next;
+ if (cfs_rq->next) {
+ buddy = cfs_rq->next;
+ cfs_rq->next = NULL;
+ if (wakeup_preempt_entity(buddy, se) < 1)
+ return buddy;
+ }
- if (cfs_rq->last && wakeup_preempt_entity(cfs_rq->last, se) < 1)
- return cfs_rq->last;
+ if (cfs_rq->last) {
+ buddy = cfs_rq->last;
+ cfs_rq->last = NULL;
+ if (wakeup_preempt_entity(buddy, se) < 1)
+ return buddy;
+ }
return se;
}
@@ -1654,16 +1663,6 @@ static struct task_struct *pick_next_task_fair(struct rq *rq)
do {
se = pick_next_entity(cfs_rq);
- /*
- * If se was a buddy, clear it so that it will have to earn
- * the favour again.
- *
- * If se was not a buddy, clear the buddies because neither
- * was elegible to run, let them earn it again.
- *
- * IOW. unconditionally clear buddies.
- */
- __clear_buddies(cfs_rq, NULL);
set_next_entity(cfs_rq, se);
cfs_rq = group_cfs_rq(se);
} while (cfs_rq);
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