On Mon, 6 Dec 2021 20:49:47 +0800, John Garry wrote:
> In [0] Kashyap reports high CPU usage for blk_mq_queue_tag_busy_iter()
> and callees for shared tags.
>
> Indeed blk_mq_queue_tag_busy_iter() would be less optimum for moving to
> shared tags, but it was not optimum previously.
>
> This series optimises by having only a single iter (per regular and resv
> tags) for the shared tags, instead of an iter per HW queue.
>
> [...]
Applied, thanks!
[1/3] blk-mq: Drop busy_iter_fn blk_mq_hw_ctx argument
(no commit info)
[2/3] blk-mq: Delete busy_iter_fn
(no commit info)
[3/3] blk-mq: Optimise blk_mq_queue_tag_busy_iter() for shared tags
(no commit info)
Best regards,
--
Jens Axboe
