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| author | Christoph Hellwig <hch@lst.de> | 2021-01-24 11:02:36 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-01-24 18:17:20 -0700 |
| commit | 30c5d3456c272f0de0d7e7eb9fc355fa64a5f649 (patch) | |
| tree | 8901f97019c05ddd88c2efa9994c7943519107d1 /block/blk-core.c | |
| parent | 2f9f6221b9b9944e96c80455b469a6f0269c558b (diff) | |
| download | lwn-30c5d3456c272f0de0d7e7eb9fc355fa64a5f649.tar.gz lwn-30c5d3456c272f0de0d7e7eb9fc355fa64a5f649.zip | |
block: do not reassig ->bi_bdev when partition remapping
There is no good reason to reassign ->bi_bdev when remapping the
partition-relative block number to the device wide one, as all the
information required by the drivers comes from the gendisk anyway.
Keeping the original ->bi_bdev alive will allow to greatly simplify
the partition-away I/O accounting.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-core.c')
| -rw-r--r-- | block/blk-core.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-core.c b/block/blk-core.c index 64f69022de96..1c1b97a82caa 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -752,7 +752,7 @@ static int blk_partition_remap(struct bio *bio) bio->bi_iter.bi_sector - p->bd_start_sect); } - bio->bi_bdev = bdev_whole(p); + bio_set_flag(bio, BIO_REMAPPED); return 0; } @@ -817,7 +817,8 @@ static noinline_for_stack bool submit_bio_checks(struct bio *bio) goto end_io; if (unlikely(bio_check_eod(bio))) goto end_io; - if (bio->bi_bdev->bd_partno && unlikely(blk_partition_remap(bio))) + if (bio->bi_bdev->bd_partno && !bio_flagged(bio, BIO_REMAPPED) && + unlikely(blk_partition_remap(bio))) goto end_io; /* |