diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/cfq-iosched.c | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 03b1e474b2b..bf571b2b7d7 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -688,7 +688,7 @@ __cfq_set_active_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq) */ static void __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq, - int preempted) + int preempted, int timed_out) { if (cfq_cfqq_wait_request(cfqq)) del_timer(&cfqd->idle_slice_timer); @@ -704,7 +704,7 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq, * store what was left of this slice, if the queue idled out * or was preempted */ - if (!cfq_cfqq_slice_new(cfqq)) + if (timed_out && !cfq_cfqq_slice_new(cfqq)) cfqq->slice_resid = cfqq->slice_end - jiffies; cfq_resort_rr_list(cfqq, preempted); @@ -720,12 +720,13 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq, cfqd->dispatch_slice = 0; } -static inline void cfq_slice_expired(struct cfq_data *cfqd, int preempted) +static inline void cfq_slice_expired(struct cfq_data *cfqd, int preempted, + int timed_out) { struct cfq_queue *cfqq = cfqd->active_queue; if (cfqq) - __cfq_slice_expired(cfqd, cfqq, preempted); + __cfq_slice_expired(cfqd, cfqq, preempted, timed_out); } /* @@ -942,7 +943,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd) } expire: - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, 0); new_queue: cfqq = cfq_set_active_queue(cfqd); keep_queue: @@ -992,7 +993,7 @@ __cfq_dispatch_requests(struct cfq_data *cfqd, struct cfq_queue *cfqq, cfqd->dispatch_slice >= cfq_prio_to_maxrq(cfqd, cfqq)) || cfq_class_idle(cfqq)) { cfqq->slice_end = jiffies + 1; - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, 0); } return dispatched; @@ -1028,7 +1029,7 @@ cfq_forced_dispatch(struct cfq_data *cfqd) dispatched += cfq_forced_dispatch_cfqqs(&cfqd->cur_rr); dispatched += cfq_forced_dispatch_cfqqs(&cfqd->idle_rr); - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, 0); BUG_ON(cfqd->busy_queues); @@ -1102,7 +1103,7 @@ static void cfq_put_queue(struct cfq_queue *cfqq) BUG_ON(cfq_cfqq_on_rr(cfqq)); if (unlikely(cfqd->active_queue == cfqq)) - __cfq_slice_expired(cfqd, cfqq, 0); + __cfq_slice_expired(cfqd, cfqq, 0, 0); /* * it's on the empty list and still hashed @@ -1158,7 +1159,7 @@ static void cfq_free_io_context(struct io_context *ioc) static void cfq_exit_cfqq(struct cfq_data *cfqd, struct cfq_queue *cfqq) { if (unlikely(cfqq == cfqd->active_queue)) - __cfq_slice_expired(cfqd, cfqq, 0); + __cfq_slice_expired(cfqd, cfqq, 0, 0); cfq_put_queue(cfqq); } @@ -1607,7 +1608,7 @@ cfq_should_preempt(struct cfq_data *cfqd, struct cfq_queue *new_cfqq, */ static void cfq_preempt_queue(struct cfq_data *cfqd, struct cfq_queue *cfqq) { - cfq_slice_expired(cfqd, 1); + cfq_slice_expired(cfqd, 1, 1); /* * Put the new queue at the front of the of the current list, @@ -1650,7 +1651,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq, */ if (cic == cfqd->active_cic && del_timer(&cfqd->idle_slice_timer)) { - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, 0); blk_start_queueing(cfqd->queue); } return; @@ -1732,7 +1733,7 @@ static void cfq_completed_request(request_queue_t *q, struct request *rq) cfq_clear_cfqq_slice_new(cfqq); } if (cfq_slice_used(cfqq)) - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, 1); else if (sync && RB_EMPTY_ROOT(&cfqq->sort_list)) { if (!cfq_arm_slice_timer(cfqd)) cfq_schedule_dispatch(cfqd); @@ -1906,10 +1907,13 @@ static void cfq_idle_slice_timer(unsigned long data) struct cfq_data *cfqd = (struct cfq_data *) data; struct cfq_queue *cfqq; unsigned long flags; + int timed_out = 1; spin_lock_irqsave(cfqd->queue->queue_lock, flags); if ((cfqq = cfqd->active_queue) != NULL) { + timed_out = 0; + /* * expired */ @@ -1932,7 +1936,7 @@ static void cfq_idle_slice_timer(unsigned long data) } } expire: - cfq_slice_expired(cfqd, 0); + cfq_slice_expired(cfqd, 0, timed_out); out_kick: cfq_schedule_dispatch(cfqd); out_cont: @@ -1978,7 +1982,7 @@ static void cfq_exit_queue(elevator_t *e) spin_lock_irq(q->queue_lock); if (cfqd->active_queue) - __cfq_slice_expired(cfqd, cfqd->active_queue, 0); + __cfq_slice_expired(cfqd, cfqd->active_queue, 0, 0); while (!list_empty(&cfqd->cic_list)) { struct cfq_io_context *cic = list_entry(cfqd->cic_list.next, |