diff options
Diffstat (limited to 'kernel/sched/core.c')
| -rw-r--r-- | kernel/sched/core.c | 64 |
1 files changed, 42 insertions, 22 deletions
diff --git a/kernel/sched/core.c b/kernel/sched/core.c index dd05a378631a..90e4b00ace89 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -16,6 +16,7 @@ #include <asm/tlb.h> #include "../workqueue_internal.h" +#include "../../fs/io-wq.h" #include "../smpboot.h" #include "pelt.h" @@ -810,7 +811,7 @@ static inline unsigned int uclamp_bucket_base_value(unsigned int clamp_value) return UCLAMP_BUCKET_DELTA * uclamp_bucket_id(clamp_value); } -static inline enum uclamp_id uclamp_none(enum uclamp_id clamp_id) +static inline unsigned int uclamp_none(enum uclamp_id clamp_id) { if (clamp_id == UCLAMP_MIN) return 0; @@ -853,7 +854,7 @@ static inline void uclamp_idle_reset(struct rq *rq, enum uclamp_id clamp_id, } static inline -enum uclamp_id uclamp_rq_max_value(struct rq *rq, enum uclamp_id clamp_id, +unsigned int uclamp_rq_max_value(struct rq *rq, enum uclamp_id clamp_id, unsigned int clamp_value) { struct uclamp_bucket *bucket = rq->uclamp[clamp_id].bucket; @@ -918,7 +919,7 @@ uclamp_eff_get(struct task_struct *p, enum uclamp_id clamp_id) return uc_req; } -enum uclamp_id uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id) +unsigned int uclamp_eff_value(struct task_struct *p, enum uclamp_id clamp_id) { struct uclamp_se uc_eff; @@ -1065,7 +1066,7 @@ uclamp_update_active(struct task_struct *p, enum uclamp_id clamp_id) * affecting a valid clamp bucket, the next time it's enqueued, * it will already see the updated clamp bucket value. */ - if (!p->uclamp[clamp_id].active) { + if (p->uclamp[clamp_id].active) { uclamp_rq_dec_id(rq, p, clamp_id); uclamp_rq_inc_id(rq, p, clamp_id); } @@ -1073,6 +1074,7 @@ uclamp_update_active(struct task_struct *p, enum uclamp_id clamp_id) task_rq_unlock(rq, p, &rf); } +#ifdef CONFIG_UCLAMP_TASK_GROUP static inline void uclamp_update_active_tasks(struct cgroup_subsys_state *css, unsigned int clamps) @@ -1091,7 +1093,6 @@ uclamp_update_active_tasks(struct cgroup_subsys_state *css, css_task_iter_end(&it); } -#ifdef CONFIG_UCLAMP_TASK_GROUP static void cpu_util_update_eff(struct cgroup_subsys_state *css); static void uclamp_update_root_tg(void) { @@ -3105,7 +3106,7 @@ prepare_lock_switch(struct rq *rq, struct task_struct *next, struct rq_flags *rf * do an early lockdep release here: */ rq_unpin_lock(rq, rf); - spin_release(&rq->lock.dep_map, 1, _THIS_IP_); + spin_release(&rq->lock.dep_map, _THIS_IP_); #ifdef CONFIG_DEBUG_SPINLOCK /* this is a valid case when another task releases the spinlock */ rq->lock.owner = next; @@ -3917,28 +3918,39 @@ pick_next_task(struct rq *rq, struct task_struct *prev, struct rq_flags *rf) prev->sched_class == &fair_sched_class) && rq->nr_running == rq->cfs.h_nr_running)) { - p = fair_sched_class.pick_next_task(rq, prev, rf); + p = pick_next_task_fair(rq, prev, rf); if (unlikely(p == RETRY_TASK)) goto restart; /* Assumes fair_sched_class->next == idle_sched_class */ - if (unlikely(!p)) - p = idle_sched_class.pick_next_task(rq, prev, rf); + if (!p) { + put_prev_task(rq, prev); + p = pick_next_task_idle(rq); + } return p; } restart: +#ifdef CONFIG_SMP /* - * Ensure that we put DL/RT tasks before the pick loop, such that they - * can PULL higher prio tasks when we lower the RQ 'priority'. + * We must do the balancing pass before put_next_task(), such + * that when we release the rq->lock the task is in the same + * state as before we took rq->lock. + * + * We can terminate the balance pass as soon as we know there is + * a runnable task of @class priority or higher. */ - prev->sched_class->put_prev_task(rq, prev, rf); - if (!rq->nr_running) - newidle_balance(rq, rf); + for_class_range(class, prev->sched_class, &idle_sched_class) { + if (class->balance(rq, prev, rf)) + break; + } +#endif + + put_prev_task(rq, prev); for_each_class(class) { - p = class->pick_next_task(rq, NULL, NULL); + p = class->pick_next_task(rq); if (p) return p; } @@ -4103,9 +4115,12 @@ static inline void sched_submit_work(struct task_struct *tsk) * we disable preemption to avoid it calling schedule() again * in the possible wakeup of a kworker. */ - if (tsk->flags & PF_WQ_WORKER) { + if (tsk->flags & (PF_WQ_WORKER | PF_IO_WORKER)) { preempt_disable(); - wq_worker_sleeping(tsk); + if (tsk->flags & PF_WQ_WORKER) + wq_worker_sleeping(tsk); + else + io_wq_worker_sleeping(tsk); preempt_enable_no_resched(); } @@ -4122,8 +4137,12 @@ static inline void sched_submit_work(struct task_struct *tsk) static void sched_update_worker(struct task_struct *tsk) { - if (tsk->flags & PF_WQ_WORKER) - wq_worker_running(tsk); + if (tsk->flags & (PF_WQ_WORKER | PF_IO_WORKER)) { + if (tsk->flags & PF_WQ_WORKER) + wq_worker_running(tsk); + else + io_wq_worker_running(tsk); + } } asmlinkage __visible void __sched schedule(void) @@ -6010,10 +6029,11 @@ void init_idle(struct task_struct *idle, int cpu) struct rq *rq = cpu_rq(cpu); unsigned long flags; + __sched_fork(0, idle); + raw_spin_lock_irqsave(&idle->pi_lock, flags); raw_spin_lock(&rq->lock); - __sched_fork(0, idle); idle->state = TASK_RUNNING; idle->se.exec_start = sched_clock(); idle->flags |= PF_IDLE; @@ -6199,9 +6219,9 @@ static struct task_struct *__pick_migrate_task(struct rq *rq) struct task_struct *next; for_each_class(class) { - next = class->pick_next_task(rq, NULL, NULL); + next = class->pick_next_task(rq); if (next) { - next->sched_class->put_prev_task(rq, next, NULL); + next->sched_class->put_prev_task(rq, next); return next; } } |