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block/rq_qos: implement rq_qos_ops->queue_depth_changed()

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wbt already gets queue depth changed notification through
wbt_set_queue_depth().  Generalize it into
rq_qos_ops->queue_depth_changed() so that other rq_qos policies can
easily hook into the events too.

Signed-off-by: Tejun Heo <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
This commit is contained in:
Tejun Heo 2019-08-28 15:05:55 -07:00 • committed by Jens Axboe
commit 9677a3e01f
5 changed files with 26 additions and 15 deletions
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4
block/blk-wbt.h
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@ -95,7 +95,6 @@ void wbt_enable_default(struct request_queue *);
u64 wbt_get_min_lat(struct request_queue *q);
void wbt_set_min_lat(struct request_queue *q, u64 val);
void wbt_set_queue_depth(struct request_queue *, unsigned int);
void wbt_set_write_cache(struct request_queue *, bool);
u64 wbt_default_latency_nsec(struct request_queue *);
@ -118,9 +117,6 @@ static inline void wbt_disable_default(struct request_queue *q)
static inline void wbt_enable_default(struct request_queue *q)
{
}
static inline void wbt_set_queue_depth(struct request_queue *q, unsigned int depth)
{
}
static inline void wbt_set_write_cache(struct request_queue *q, bool wc)
{
}