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| author |   Jens Axboe <axboe@kernel.dk> | 2021-11-03 05:47:09 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-11-04 23:20:10 -0600 |
| commit | 900e080752025f0016128f07c9ed4c50eba3654b (patch) | |
| tree | 0429d43fed6fcb41ab394987d423bc08a042e730 /block/blk.h | |
| parent | block: make bio_queue_enter() fast-path available inline (diff) | |
| download | wireguard-linux-900e080752025f0016128f07c9ed4c50eba3654b.tar.xz wireguard-linux-900e080752025f0016128f07c9ed4c50eba3654b.zip | |
block: move queue enter logic into blk_mq_submit_bio()
Retain the old logic for the fops based submit, but for our internal
blk_mq_submit_bio(), move the queue entering logic into the core
function itself.
We need to be a bit careful if going into the scheduler, as a scheduler
or queue mappings can arbitrarily change before we have entered the queue.
Have the bio scheduler mapping do that separately, it's a very cheap
operation compared to actually doing merging locking and lookups.
Reviewed-by: Christoph Hellwig <hch@lst.de>
[axboe: update to check merge post submit_bio_checks() doing remap...]
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk.h')
| -rw-r--r-- | block/blk.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/block/blk.h b/block/blk.h index 814d9632d43e..b4fed2033e48 100644 --- a/block/blk.h +++ b/block/blk.h @@ -56,6 +56,7 @@ void blk_freeze_queue(struct request_queue *q); void __blk_mq_unfreeze_queue(struct request_queue *q, bool force_atomic); void blk_queue_start_drain(struct request_queue *q); int __bio_queue_enter(struct request_queue *q, struct bio *bio); +bool submit_bio_checks(struct bio *bio); static inline bool blk_try_enter_queue(struct request_queue *q, bool pm) { |