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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-core.c | |
| parent | c98cb5bbdab10d187aff9b4e386210eb2332af96 (diff) | |
| download | linux-900e080752025f0016128f07c9ed4c50eba3654b.tar.bz2 | |
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-core.c')
| -rw-r--r-- | block/blk-core.c | 25 |
1 files changed, 13 insertions, 12 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 9ca3ddd154d4..4366056e14c4 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -744,7 +744,7 @@ static inline blk_status_t blk_check_zone_append(struct request_queue *q, return BLK_STS_OK; } -static noinline_for_stack bool submit_bio_checks(struct bio *bio) +noinline_for_stack bool submit_bio_checks(struct bio *bio) { struct block_device *bdev = bio->bi_bdev; struct request_queue *q = bdev_get_queue(bdev); @@ -862,22 +862,23 @@ end_io: return false; } -static void __submit_bio(struct bio *bio) +static void __submit_bio_fops(struct gendisk *disk, struct bio *bio) { - struct gendisk *disk = bio->bi_bdev->bd_disk; - if (unlikely(bio_queue_enter(bio) != 0)) return; + if (submit_bio_checks(bio) && blk_crypto_bio_prep(&bio)) + disk->fops->submit_bio(bio); + blk_queue_exit(disk->queue); +} - if (!submit_bio_checks(bio) || !blk_crypto_bio_prep(&bio)) - goto queue_exit; - if (!disk->fops->submit_bio) { +static void __submit_bio(struct bio *bio) +{ + struct gendisk *disk = bio->bi_bdev->bd_disk; + + if (!disk->fops->submit_bio) blk_mq_submit_bio(bio); - return; - } - disk->fops->submit_bio(bio); -queue_exit: - blk_queue_exit(disk->queue); + else + __submit_bio_fops(disk, bio); } /* |