cfq-iosched: Convert to use highres timers
Reviewed-by: Jeff Moyer <jmoyer@redhat.com> Signed-off-by: Jan Kara <jack@suse.com> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -362,7 +362,7 @@ struct cfq_data {
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/*
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* idle window management
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*/
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struct timer_list idle_slice_timer;
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struct hrtimer idle_slice_timer;
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struct work_struct unplug_work;
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struct cfq_queue *active_queue;
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@ -2627,7 +2627,7 @@ static int cfq_allow_merge(struct request_queue *q, struct request *rq,
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static inline void cfq_del_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
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{
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del_timer(&cfqd->idle_slice_timer);
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hrtimer_try_to_cancel(&cfqd->idle_slice_timer);
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cfqg_stats_update_idle_time(cfqq->cfqg);
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}
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@ -2989,7 +2989,8 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
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else
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sl = cfqd->cfq_slice_idle;
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mod_timer(&cfqd->idle_slice_timer, now + sl);
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hrtimer_start(&cfqd->idle_slice_timer, ns_to_ktime(sl),
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HRTIMER_MODE_REL);
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cfqg_stats_set_start_idle_time(cfqq->cfqg);
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cfq_log_cfqq(cfqd, cfqq, "arm_idle: %llu group_idle: %d", sl,
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group_idle ? 1 : 0);
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@ -3308,7 +3309,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
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* flight or is idling for a new request, allow either of these
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* conditions to happen (or time out) before selecting a new queue.
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*/
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if (timer_pending(&cfqd->idle_slice_timer)) {
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if (hrtimer_active(&cfqd->idle_slice_timer)) {
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cfqq = NULL;
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goto keep_queue;
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}
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@ -4454,9 +4455,10 @@ static void cfq_kick_queue(struct work_struct *work)
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/*
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* Timer running if the active_queue is currently idling inside its time slice
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*/
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static void cfq_idle_slice_timer(unsigned long data)
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static enum hrtimer_restart cfq_idle_slice_timer(struct hrtimer *timer)
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{
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struct cfq_data *cfqd = (struct cfq_data *) data;
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struct cfq_data *cfqd = container_of(timer, struct cfq_data,
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idle_slice_timer);
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struct cfq_queue *cfqq;
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unsigned long flags;
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int timed_out = 1;
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@ -4505,11 +4507,12 @@ static void cfq_idle_slice_timer(unsigned long data)
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cfq_schedule_dispatch(cfqd);
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out_cont:
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spin_unlock_irqrestore(cfqd->queue->queue_lock, flags);
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return HRTIMER_NORESTART;
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}
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static void cfq_shutdown_timer_wq(struct cfq_data *cfqd)
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{
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del_timer_sync(&cfqd->idle_slice_timer);
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hrtimer_cancel(&cfqd->idle_slice_timer);
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cancel_work_sync(&cfqd->unplug_work);
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}
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@ -4605,9 +4608,9 @@ static int cfq_init_queue(struct request_queue *q, struct elevator_type *e)
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cfqg_put(cfqd->root_group);
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spin_unlock_irq(q->queue_lock);
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init_timer(&cfqd->idle_slice_timer);
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hrtimer_init(&cfqd->idle_slice_timer, CLOCK_MONOTONIC,
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HRTIMER_MODE_REL);
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cfqd->idle_slice_timer.function = cfq_idle_slice_timer;
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cfqd->idle_slice_timer.data = (unsigned long) cfqd;
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INIT_WORK(&cfqd->unplug_work, cfq_kick_queue);
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