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-rw-r--r--block/cfq-iosched.c50
1 files changed, 32 insertions, 18 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 8e0b86a9111a..b6e095c7ef5e 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -886,7 +886,7 @@ static inline unsigned int cfq_cfqq_slice_usage(struct cfq_queue *cfqq)
}
static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
- struct cfq_queue *cfqq)
+ struct cfq_queue *cfqq, bool forced)
{
struct cfq_rb_root *st = &cfqd->grp_service_tree;
unsigned int used_sl, charge_sl;
@@ -916,6 +916,7 @@ static void cfq_group_served(struct cfq_data *cfqd, struct cfq_group *cfqg,
cfq_log_cfqg(cfqd, cfqg, "served: vt=%llu min_vt=%llu", cfqg->vdisktime,
st->min_vdisktime);
blkiocg_update_timeslice_used(&cfqg->blkg, used_sl);
+ blkiocg_set_start_empty_time(&cfqg->blkg, forced);
}
#ifdef CONFIG_CFQ_GROUP_IOSCHED
@@ -1528,6 +1529,12 @@ static int cfq_allow_merge(struct request_queue *q, struct request *rq,
return cfqq == RQ_CFQQ(rq);
}
+static inline void cfq_del_timer(struct cfq_data *cfqd, struct cfq_queue *cfqq)
+{
+ del_timer(&cfqd->idle_slice_timer);
+ blkiocg_update_idle_time_stats(&cfqq->cfqg->blkg);
+}
+
static void __cfq_set_active_queue(struct cfq_data *cfqd,
struct cfq_queue *cfqq)
{
@@ -1547,7 +1554,7 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
cfq_clear_cfqq_fifo_expire(cfqq);
cfq_mark_cfqq_slice_new(cfqq);
- del_timer(&cfqd->idle_slice_timer);
+ cfq_del_timer(cfqd, cfqq);
}
cfqd->active_queue = cfqq;
@@ -1558,12 +1565,12 @@ static void __cfq_set_active_queue(struct cfq_data *cfqd,
*/
static void
__cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
- bool timed_out)
+ bool timed_out, bool forced)
{
cfq_log_cfqq(cfqd, cfqq, "slice expired t=%d", timed_out);
if (cfq_cfqq_wait_request(cfqq))
- del_timer(&cfqd->idle_slice_timer);
+ cfq_del_timer(cfqd, cfqq);
cfq_clear_cfqq_wait_request(cfqq);
cfq_clear_cfqq_wait_busy(cfqq);
@@ -1585,7 +1592,7 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
cfq_log_cfqq(cfqd, cfqq, "resid=%ld", cfqq->slice_resid);
}
- cfq_group_served(cfqd, cfqq->cfqg, cfqq);
+ cfq_group_served(cfqd, cfqq->cfqg, cfqq, forced);
if (cfq_cfqq_on_rr(cfqq) && RB_EMPTY_ROOT(&cfqq->sort_list))
cfq_del_cfqq_rr(cfqd, cfqq);
@@ -1604,12 +1611,13 @@ __cfq_slice_expired(struct cfq_data *cfqd, struct cfq_queue *cfqq,
}
}
-static inline void cfq_slice_expired(struct cfq_data *cfqd, bool timed_out)
+static inline void cfq_slice_expired(struct cfq_data *cfqd, bool timed_out,
+ bool forced)
{
struct cfq_queue *cfqq = cfqd->active_queue;
if (cfqq)
- __cfq_slice_expired(cfqd, cfqq, timed_out);
+ __cfq_slice_expired(cfqd, cfqq, timed_out, forced);
}
/*
@@ -1865,6 +1873,7 @@ static void cfq_arm_slice_timer(struct cfq_data *cfqd)
sl = cfqd->cfq_slice_idle;
mod_timer(&cfqd->idle_slice_timer, jiffies + sl);
+ blkiocg_update_set_idle_time_stats(&cfqq->cfqg->blkg);
cfq_log_cfqq(cfqd, cfqq, "arm_idle: %lu", sl);
}
@@ -2176,7 +2185,7 @@ static struct cfq_queue *cfq_select_queue(struct cfq_data *cfqd)
}
expire:
- cfq_slice_expired(cfqd, 0);
+ cfq_slice_expired(cfqd, 0, false);
new_queue:
/*
* Current queue expired. Check if we have to switch to a new
@@ -2202,7 +2211,7 @@ static int __cfq_forced_dispatch_cfqq(struct cfq_queue *cfqq)
BUG_ON(!list_empty(&cfqq->fifo));
/* By default cfqq is not expired if it is empty. Do it explicitly */
- __cfq_slice_expired(cfqq->cfqd, cfqq, 0);
+ __cfq_slice_expired(cfqq->cfqd, cfqq, 0, true);
return dispatched;
}
@@ -2218,7 +2227,7 @@ static int cfq_forced_dispatch(struct cfq_data *cfqd)
while ((cfqq = cfq_get_next_queue_forced(cfqd)) != NULL)
dispatched += __cfq_forced_dispatch_cfqq(cfqq);
- cfq_slice_expired(cfqd, 0);
+ cfq_slice_expired(cfqd, 0, true);
BUG_ON(cfqd->busy_queues);
cfq_log(cfqd, "forced_dispatch=%d", dispatched);
@@ -2382,10 +2391,15 @@ static int cfq_dispatch_requests(struct request_queue *q, int force)
cfqq->slice_dispatch >= 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, false);
}
cfq_log_cfqq(cfqd, cfqq, "dispatched a request");
+ /*
+ * This is needed since we don't exactly match the mod_timer() and
+ * del_timer() calls in CFQ.
+ */
+ blkiocg_update_idle_time_stats(&cfqq->cfqg->blkg);
return 1;
}
@@ -2413,7 +2427,7 @@ static void cfq_put_queue(struct cfq_queue *cfqq)
orig_cfqg = cfqq->orig_cfqg;
if (unlikely(cfqd->active_queue == cfqq)) {
- __cfq_slice_expired(cfqd, cfqq, 0);
+ __cfq_slice_expired(cfqd, cfqq, 0, false);
cfq_schedule_dispatch(cfqd);
}
@@ -2514,7 +2528,7 @@ static void cfq_exit_cfqq(struct cfq_data *cfqd, struct cfq_queue *cfqq)
struct cfq_queue *__cfqq, *next;
if (unlikely(cfqq == cfqd->active_queue)) {
- __cfq_slice_expired(cfqd, cfqq, 0);
+ __cfq_slice_expired(cfqd, cfqq, 0, false);
cfq_schedule_dispatch(cfqd);
}
@@ -3143,7 +3157,7 @@ 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_log_cfqq(cfqd, cfqq, "preempt");
- cfq_slice_expired(cfqd, 1);
+ cfq_slice_expired(cfqd, 1, false);
/*
* Put the new queue at the front of the of the current list,
@@ -3191,7 +3205,7 @@ cfq_rq_enqueued(struct cfq_data *cfqd, struct cfq_queue *cfqq,
if (cfq_cfqq_wait_request(cfqq)) {
if (blk_rq_bytes(rq) > PAGE_CACHE_SIZE ||
cfqd->busy_queues > 1) {
- del_timer(&cfqd->idle_slice_timer);
+ cfq_del_timer(cfqd, cfqq);
cfq_clear_cfqq_wait_request(cfqq);
__blk_run_queue(cfqd->queue);
} else
@@ -3352,7 +3366,7 @@ static void cfq_completed_request(struct request_queue *q, struct request *rq)
* - when there is a close cooperator
*/
if (cfq_slice_used(cfqq) || cfq_class_idle(cfqq))
- cfq_slice_expired(cfqd, 1);
+ cfq_slice_expired(cfqd, 1, false);
else if (sync && cfqq_empty &&
!cfq_close_cooperator(cfqd, cfqq)) {
cfqd->noidle_tree_requires_idle |= !rq_noidle(rq);
@@ -3612,7 +3626,7 @@ static void cfq_idle_slice_timer(unsigned long data)
cfq_clear_cfqq_deep(cfqq);
}
expire:
- cfq_slice_expired(cfqd, timed_out);
+ cfq_slice_expired(cfqd, timed_out, false);
out_kick:
cfq_schedule_dispatch(cfqd);
out_cont:
@@ -3655,7 +3669,7 @@ static void cfq_exit_queue(struct elevator_queue *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, false);
while (!list_empty(&cfqd->cic_list)) {
struct cfq_io_context *cic = list_entry(cfqd->cic_list.next,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.