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| author | Ming Lei <tom.leiming@gmail.com> | 2017-02-14 18:29:03 +0300 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-02-15 22:24:54 +0300 |
| commit | d7a1030839d35c04a620e841f406b9b2a8600041 (patch) | |
| tree | 293b09d7b92528436daa8953c9202cf669702037 /drivers/md/raid1.c | |
| parent | ed7ef732ca9f7d6f42be8df6cc7bf4ace3534af3 (diff) | |
| download | linux-d7a1030839d35c04a620e841f406b9b2a8600041.tar.xz | |
md: fast clone bio in bio_clone_mddev()
Firstly bio_clone_mddev() is used in raid normal I/O and isn't
in resync I/O path.
Secondly all the direct access to bvec table in raid happens on
resync I/O except for write behind of raid1, in which we still
use bio_clone() for allocating new bvec table.
So this patch replaces bio_clone() with bio_clone_fast()
in bio_clone_mddev().
Also kill bio_clone_mddev() and call bio_clone_fast() directly, as
suggested by Christoph Hellwig.
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 691d6d9bf740..ad5c9483bd50 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1108,7 +1108,7 @@ read_again: r1_bio->read_disk = rdisk; r1_bio->start_next_window = 0; - read_bio = bio_clone_mddev(bio, GFP_NOIO, mddev); + read_bio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set); bio_trim(read_bio, r1_bio->sector - bio->bi_iter.bi_sector, max_sectors); @@ -1376,7 +1376,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio, } if (!mbio) { - mbio = bio_clone_mddev(bio, GFP_NOIO, mddev); + mbio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set); bio_trim(mbio, offset, max_sectors); } @@ -2286,7 +2286,8 @@ static int narrow_write_error(struct r1bio *r1_bio, int i) wbio->bi_vcnt = vcnt; } else { - wbio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev); + wbio = bio_clone_fast(r1_bio->master_bio, GFP_NOIO, + mddev->bio_set); } bio_set_op_attrs(wbio, REQ_OP_WRITE, 0); @@ -2424,7 +2425,8 @@ read_more: const unsigned long do_sync = r1_bio->master_bio->bi_opf & REQ_SYNC; r1_bio->read_disk = disk; - bio = bio_clone_mddev(r1_bio->master_bio, GFP_NOIO, mddev); + bio = bio_clone_fast(r1_bio->master_bio, GFP_NOIO, + mddev->bio_set); bio_trim(bio, r1_bio->sector - bio->bi_iter.bi_sector, max_sectors); r1_bio->bios[r1_bio->read_disk] = bio; |