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-rw-r--r--kernel/sched_fair.c32
1 files changed, 19 insertions, 13 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 9ffb2b2ceba4..652e8bdef9aa 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -611,9 +611,13 @@ account_entity_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se)
611static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se) 611static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
612{ 612{
613#ifdef CONFIG_SCHEDSTATS 613#ifdef CONFIG_SCHEDSTATS
614 struct task_struct *tsk = NULL;
615
616 if (entity_is_task(se))
617 tsk = task_of(se);
618
614 if (se->sleep_start) { 619 if (se->sleep_start) {
615 u64 delta = rq_of(cfs_rq)->clock - se->sleep_start; 620 u64 delta = rq_of(cfs_rq)->clock - se->sleep_start;
616 struct task_struct *tsk = task_of(se);
617 621
618 if ((s64)delta < 0) 622 if ((s64)delta < 0)
619 delta = 0; 623 delta = 0;
@@ -624,11 +628,11 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
624 se->sleep_start = 0; 628 se->sleep_start = 0;
625 se->sum_sleep_runtime += delta; 629 se->sum_sleep_runtime += delta;
626 630
627 account_scheduler_latency(tsk, delta >> 10, 1); 631 if (tsk)
632 account_scheduler_latency(tsk, delta >> 10, 1);
628 } 633 }
629 if (se->block_start) { 634 if (se->block_start) {
630 u64 delta = rq_of(cfs_rq)->clock - se->block_start; 635 u64 delta = rq_of(cfs_rq)->clock - se->block_start;
631 struct task_struct *tsk = task_of(se);
632 636
633 if ((s64)delta < 0) 637 if ((s64)delta < 0)
634 delta = 0; 638 delta = 0;
@@ -639,17 +643,19 @@ static void enqueue_sleeper(struct cfs_rq *cfs_rq, struct sched_entity *se)
639 se->block_start = 0; 643 se->block_start = 0;
640 se->sum_sleep_runtime += delta; 644 se->sum_sleep_runtime += delta;
641 645
642 /* 646 if (tsk) {
643 * Blocking time is in units of nanosecs, so shift by 20 to 647 /*
644 * get a milliseconds-range estimation of the amount of 648 * Blocking time is in units of nanosecs, so shift by
645 * time that the task spent sleeping: 649 * 20 to get a milliseconds-range estimation of the
646 */ 650 * amount of time that the task spent sleeping:
647 if (unlikely(prof_on == SLEEP_PROFILING)) { 651 */
648 652 if (unlikely(prof_on == SLEEP_PROFILING)) {
649 profile_hits(SLEEP_PROFILING, (void *)get_wchan(tsk), 653 profile_hits(SLEEP_PROFILING,
650 delta >> 20); 654 (void *)get_wchan(tsk),
655 delta >> 20);
656 }
657 account_scheduler_latency(tsk, delta >> 10, 0);
651 } 658 }
652 account_scheduler_latency(tsk, delta >> 10, 0);
653 } 659 }
654#endif 660#endif
655} 661}