diff options
Diffstat (limited to 'kernel/sched/stats.h')
| -rw-r--r-- | kernel/sched/stats.h | 37 |
1 files changed, 12 insertions, 25 deletions
diff --git a/kernel/sched/stats.h b/kernel/sched/stats.h index 33d0daf83842..dc218e9f4558 100644 --- a/kernel/sched/stats.h +++ b/kernel/sched/stats.h @@ -84,28 +84,24 @@ static inline void psi_enqueue(struct task_struct *p, bool wakeup) static inline void psi_dequeue(struct task_struct *p, bool sleep) { - int clear = TSK_RUNNING, set = 0; + int clear = TSK_RUNNING; if (static_branch_likely(&psi_disabled)) return; - if (!sleep) { - if (p->in_memstall) - clear |= TSK_MEMSTALL; - } else { - /* - * When a task sleeps, schedule() dequeues it before - * switching to the next one. Merge the clearing of - * TSK_RUNNING and TSK_ONCPU to save an unnecessary - * psi_task_change() call in psi_sched_switch(). - */ - clear |= TSK_ONCPU; + /* + * A voluntary sleep is a dequeue followed by a task switch. To + * avoid walking all ancestors twice, psi_task_switch() handles + * TSK_RUNNING and TSK_IOWAIT for us when it moves TSK_ONCPU. + * Do nothing here. + */ + if (sleep) + return; - if (p->in_iowait) - set |= TSK_IOWAIT; - } + if (p->in_memstall) + clear |= TSK_MEMSTALL; - psi_task_change(p, clear, set); + psi_task_change(p, clear, 0); } static inline void psi_ttwu_dequeue(struct task_struct *p) @@ -144,14 +140,6 @@ static inline void psi_sched_switch(struct task_struct *prev, psi_task_switch(prev, next, sleep); } -static inline void psi_task_tick(struct rq *rq) -{ - if (static_branch_likely(&psi_disabled)) - return; - - if (unlikely(rq->curr->in_memstall)) - psi_memstall_tick(rq->curr, cpu_of(rq)); -} #else /* CONFIG_PSI */ static inline void psi_enqueue(struct task_struct *p, bool wakeup) {} static inline void psi_dequeue(struct task_struct *p, bool sleep) {} @@ -159,7 +147,6 @@ static inline void psi_ttwu_dequeue(struct task_struct *p) {} static inline void psi_sched_switch(struct task_struct *prev, struct task_struct *next, bool sleep) {} -static inline void psi_task_tick(struct rq *rq) {} #endif /* CONFIG_PSI */ #ifdef CONFIG_SCHED_INFO |