Messages in this thread | | | Subject | Re: [PATCH v2 0/3] blk-mq: Optimise blk_mq_queue_tag_busy_iter() for shared tags | From | Jens Axboe <> | Date | Mon, 6 Dec 2021 12:07:00 -0700 |
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On 12/6/21 5:49 AM, 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. > > [0] https://lore.kernel.org/linux-block/e4e92abbe9d52bcba6b8cc6c91c442cc@mail.gmail.com/
The patch(es) are missing Fixes tags.
-- Jens Axboe
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