diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-07-01 10:59:46 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2020-07-01 15:27:24 +0200 |
| commit | ff93ea0ce7636345df1bf77a2be09dbb59f4517e (patch) | |
| tree | 07d57c6c7d93ec6e58f0479af6a3169d0617b347 | |
| parent | block: refator submit_bio_noacct (diff) | |
| download | linux-ff93ea0ce7636345df1bf77a2be09dbb59f4517e.tar.xz linux-ff93ea0ce7636345df1bf77a2be09dbb59f4517e.zip | |
block: shortcut __submit_bio_noacct for blk-mq drivers
For blk-mq drivers bios can only be inserted for the same queue. So
bypass the complicated sorting logic in __submit_bio_noacct with
a blk-mq simpler submission helper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | block/blk-core.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 57b5dc00d44c..2ff166f0d24e 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -1152,6 +1152,34 @@ static blk_qc_t __submit_bio_noacct(struct bio *bio) return ret; } +static blk_qc_t __submit_bio_noacct_mq(struct bio *bio) +{ + struct gendisk *disk = bio->bi_disk; + struct bio_list bio_list; + blk_qc_t ret = BLK_QC_T_NONE; + + bio_list_init(&bio_list); + current->bio_list = &bio_list; + + do { + WARN_ON_ONCE(bio->bi_disk != disk); + + if (unlikely(bio_queue_enter(bio) != 0)) + continue; + + if (!blk_crypto_bio_prep(&bio)) { + blk_queue_exit(disk->queue); + ret = BLK_QC_T_NONE; + continue; + } + + ret = blk_mq_submit_bio(bio); + } while ((bio = bio_list_pop(&bio_list))); + + current->bio_list = NULL; + return ret; +} + /** * submit_bio_noacct - re-submit a bio to the block device layer for I/O * @bio: The bio describing the location in memory and on the device. @@ -1177,6 +1205,8 @@ blk_qc_t submit_bio_noacct(struct bio *bio) return BLK_QC_T_NONE; } + if (!bio->bi_disk->fops->submit_bio) + return __submit_bio_noacct_mq(bio); return __submit_bio_noacct(bio); } EXPORT_SYMBOL(submit_bio_noacct); |