diff options
| -rw-r--r-- | include/linux/sched.h | 8 | ||||
| -rw-r--r-- | kernel/sched.c | 91 |
2 files changed, 2 insertions, 97 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 4dcc61cca00a..be2460e6f55b 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -788,13 +788,6 @@ struct mempolicy; struct pipe_inode_info; struct uts_namespace; -enum sleep_type { - SLEEP_NORMAL, - SLEEP_NONINTERACTIVE, - SLEEP_INTERACTIVE, - SLEEP_INTERRUPTED, -}; - struct prio_array; struct rq; struct sched_domain; @@ -905,7 +898,6 @@ struct task_struct { unsigned long sleep_avg; unsigned long long timestamp, last_ran; unsigned long long sched_time; /* sched_clock time spent running */ - enum sleep_type sleep_type; unsigned int policy; cpumask_t cpus_allowed; diff --git a/kernel/sched.c b/kernel/sched.c index 6e5a89ba4f76..26795adab3ad 100644 --- a/kernel/sched.c +++ b/kernel/sched.c @@ -990,33 +990,8 @@ static int recalc_task_prio(struct task_struct *p, unsigned long long now) * with one single large enough sleep. */ p->sleep_avg = ceiling; - /* - * Using INTERACTIVE_SLEEP() as a ceiling places a - * nice(0) task 1ms sleep away from promotion, and - * gives it 700ms to round-robin with no chance of - * being demoted. This is more than generous, so - * mark this sleep as non-interactive to prevent the - * on-runqueue bonus logic from intervening should - * this task not receive cpu immediately. - */ - p->sleep_type = SLEEP_NONINTERACTIVE; } else { /* - * Tasks waking from uninterruptible sleep are - * limited in their sleep_avg rise as they - * are likely to be waiting on I/O - */ - if (p->sleep_type == SLEEP_NONINTERACTIVE && p->mm) { - if (p->sleep_avg >= ceiling) - sleep_time = 0; - else if (p->sleep_avg + sleep_time >= - ceiling) { - p->sleep_avg = ceiling; - sleep_time = 0; - } - } - - /* * This code gives a bonus to interactive tasks. * * The boost works by updating the 'average sleep time' @@ -1069,29 +1044,6 @@ static void activate_task(struct task_struct *p, struct rq *rq, int local) } p->prio = recalc_task_prio(p, now); - - /* - * This checks to make sure it's not an uninterruptible task - * that is now waking up. - */ - if (p->sleep_type == SLEEP_NORMAL) { - /* - * Tasks which were woken up by interrupts (ie. hw events) - * are most likely of interactive nature. So we give them - * the credit of extending their sleep time to the period - * of time they spend on the runqueue, waiting for execution - * on a CPU, first time around: - */ - if (in_interrupt()) - p->sleep_type = SLEEP_INTERRUPTED; - else { - /* - * Normal first-time wakeups get a credit too for - * on-runqueue time, but it will be weighted down: - */ - p->sleep_type = SLEEP_INTERACTIVE; - } - } p->timestamp = now; out: __activate_task(p, rq); @@ -1641,23 +1593,8 @@ out_set_cpu: out_activate: #endif /* CONFIG_SMP */ - if (old_state == TASK_UNINTERRUPTIBLE) { + if (old_state == TASK_UNINTERRUPTIBLE) rq->nr_uninterruptible--; - /* - * Tasks on involuntary sleep don't earn - * sleep_avg beyond just interactive state. - */ - p->sleep_type = SLEEP_NONINTERACTIVE; - } else - - /* - * Tasks that have marked their sleep as noninteractive get - * woken up with their sleep average not weighted in an - * interactive way. - */ - if (old_state & TASK_NONINTERACTIVE) - p->sleep_type = SLEEP_NONINTERACTIVE; - activate_task(p, rq, cpu == this_cpu); /* @@ -3533,12 +3470,6 @@ EXPORT_SYMBOL(sub_preempt_count); #endif -static inline int interactive_sleep(enum sleep_type sleep_type) -{ - return (sleep_type == SLEEP_INTERACTIVE || - sleep_type == SLEEP_INTERRUPTED); -} - /* * schedule() is the main scheduler function. */ @@ -3549,7 +3480,7 @@ asmlinkage void __sched schedule(void) struct list_head *queue; unsigned long long now; unsigned long run_time; - int cpu, idx, new_prio; + int cpu, idx; long *switch_count; struct rq *rq; @@ -3642,24 +3573,6 @@ need_resched_nonpreemptible: queue = array->queue + idx; next = list_entry(queue->next, struct task_struct, run_list); - if (!rt_task(next) && interactive_sleep(next->sleep_type)) { - unsigned long long delta = now - next->timestamp; - if (unlikely((long long)(now - next->timestamp) < 0)) - delta = 0; - - if (next->sleep_type == SLEEP_INTERACTIVE) - delta = delta * (ON_RUNQUEUE_WEIGHT * 128 / 100) / 128; - - array = next->array; - new_prio = recalc_task_prio(next, next->timestamp + delta); - - if (unlikely(next->prio != new_prio)) { - dequeue_task(next, array); - next->prio = new_prio; - enqueue_task(next, array); - } - } - next->sleep_type = SLEEP_NORMAL; switch_tasks: if (next == rq->idle) schedstat_inc(rq, sched_goidle); |