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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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2
block/blk-settings.c
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@ -805,7 +805,7 @@ EXPORT_SYMBOL(blk_queue_update_dma_alignment);
void blk_set_queue_depth(struct request_queue *q, unsigned int depth)
{
q->queue_depth = depth;
wbt_set_queue_depth(q, depth);
rq_qos_queue_depth_changed(q);
}
EXPORT_SYMBOL(blk_set_queue_depth);