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| author | Jan Kara <jack@suse.cz> | 2021-11-25 14:36:34 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-29 06:38:51 -0700 |
| commit | 790cf9c84837b232eb413b8b6b5d57817176cb23 (patch) | |
| tree | 42b0a8f5652c5e17e4faf6a61f750ffe157f10e1 /block/blk-mq-sched.h | |
| parent | 639d353143fa3bfa81bbe7af263260d93d23d822 (diff) | |
| download | lwn-790cf9c84837b232eb413b8b6b5d57817176cb23.tar.gz lwn-790cf9c84837b232eb413b8b6b5d57817176cb23.zip | |
block: Provide blk_mq_sched_get_icq()
Currently we lookup ICQ only after the request is allocated. However BFQ
will want to decide how many scheduler tags it allows a given bfq queue
(effectively a process) to consume based on cgroup weight. So provide a
function blk_mq_sched_get_icq() so that BFQ can lookup ICQ earlier.
Acked-by: Paolo Valente <paolo.valente@linaro.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20211125133645.27483-1-jack@suse.cz
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq-sched.h')
| -rw-r--r-- | block/blk-mq-sched.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk-mq-sched.h b/block/blk-mq-sched.h index 25d1034952b6..add651ec06da 100644 --- a/block/blk-mq-sched.h +++ b/block/blk-mq-sched.h @@ -8,6 +8,7 @@ #define MAX_SCHED_RQ (16 * BLKDEV_DEFAULT_RQ) +struct io_cq *blk_mq_sched_get_icq(struct request_queue *q); void blk_mq_sched_assign_ioc(struct request *rq); bool blk_mq_sched_try_merge(struct request_queue *q, struct bio *bio, |