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Diffstat (limited to 'block/blk-throttle.c')
-rw-r--r--block/blk-throttle.c29
1 files changed, 7 insertions, 22 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 507b1c608941..dbeef303f27b 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -166,11 +166,6 @@ THROTL_TG_FNS(on_rr);
#define throtl_log(td, fmt, args...) \
blk_add_trace_msg((td)->queue, "throtl " fmt, ##args)
-static inline unsigned int total_nr_queued(struct throtl_data *td)
-{
- return td->nr_queued[0] + td->nr_queued[1];
-}
-
/*
* Worker for allocating per cpu stat for tgs. This is scheduled on the
* system_wq once there are some groups on the alloc_list waiting for
@@ -402,25 +397,18 @@ static void throtl_schedule_delayed_work(struct throtl_data *td,
{
struct delayed_work *dwork = &td->dispatch_work;
- if (total_nr_queued(td)) {
- mod_delayed_work(kthrotld_workqueue, dwork, delay);
- throtl_log(td, "schedule work. delay=%lu jiffies=%lu",
- delay, jiffies);
- }
+ mod_delayed_work(kthrotld_workqueue, dwork, delay);
+ throtl_log(td, "schedule work. delay=%lu jiffies=%lu", delay, jiffies);
}
static void throtl_schedule_next_dispatch(struct throtl_data *td)
{
struct throtl_rb_root *st = &td->tg_service_tree;
- /*
- * If there are more bios pending, schedule more work.
- */
- if (!total_nr_queued(td))
+ /* any pending children left? */
+ if (!st->count)
return;
- BUG_ON(!st->count);
-
update_min_dispatch_time(st);
if (time_before_eq(st->min_disptime, jiffies))
@@ -844,14 +832,11 @@ void blk_throtl_dispatch_work_fn(struct work_struct *work)
spin_lock_irq(q->queue_lock);
- if (!total_nr_queued(td))
- goto out;
-
bio_list_init(&bio_list_on_stack);
throtl_log(td, "dispatch nr_queued=%u read=%u write=%u",
- total_nr_queued(td), td->nr_queued[READ],
- td->nr_queued[WRITE]);
+ td->nr_queued[READ] + td->nr_queued[WRITE],
+ td->nr_queued[READ], td->nr_queued[WRITE]);
nr_disp = throtl_select_dispatch(td, &bio_list_on_stack);
@@ -859,7 +844,7 @@ void blk_throtl_dispatch_work_fn(struct work_struct *work)
throtl_log(td, "bios disp=%u", nr_disp);
throtl_schedule_next_dispatch(td);
-out:
+
spin_unlock_irq(q->queue_lock);
/*