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-rw-r--r--kernel/sched/fair.c11
1 files changed, 7 insertions, 4 deletions
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 5d1a6aace138..7b8990fd4896 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -993,11 +993,14 @@ update_stats_dequeue(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
if ((flags & DEQUEUE_SLEEP) && entity_is_task(se)) {
struct task_struct *tsk = task_of(se);
+ unsigned int state;
- if (tsk->state & TASK_INTERRUPTIBLE)
+ /* XXX racy against TTWU */
+ state = READ_ONCE(tsk->__state);
+ if (state & TASK_INTERRUPTIBLE)
__schedstat_set(se->statistics.sleep_start,
rq_clock(rq_of(cfs_rq)));
- if (tsk->state & TASK_UNINTERRUPTIBLE)
+ if (state & TASK_UNINTERRUPTIBLE)
__schedstat_set(se->statistics.block_start,
rq_clock(rq_of(cfs_rq)));
}
@@ -6888,7 +6891,7 @@ static void migrate_task_rq_fair(struct task_struct *p, int new_cpu)
* min_vruntime -- the latter is done by enqueue_entity() when placing
* the task on the new runqueue.
*/
- if (p->state == TASK_WAKING) {
+ if (READ_ONCE(p->__state) == TASK_WAKING) {
struct sched_entity *se = &p->se;
struct cfs_rq *cfs_rq = cfs_rq_of(se);
u64 min_vruntime;
@@ -11053,7 +11056,7 @@ static inline bool vruntime_normalized(struct task_struct *p)
* waiting for actually being woken up by sched_ttwu_pending().
*/
if (!se->sum_exec_runtime ||
- (p->state == TASK_WAKING && p->sched_remote_wakeup))
+ (READ_ONCE(p->__state) == TASK_WAKING && p->sched_remote_wakeup))
return true;
return false;