diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2023-03-21 17:18:10 +0300 |
|---|---|---|
| committer | Mike Snitzer <snitzer@kernel.org> | 2023-03-30 22:57:50 +0300 |
| commit | 56c5de4406f8234123ad08d4615865dbc13f743a (patch) | |
| tree | 0134a1c1f93e46f8ee4ff53698fce4241037ff1a /drivers/md | |
| parent | f5f93541202f2e619c1395f5d98868b70cf60f50 (diff) | |
| download | linux-56c5de4406f8234123ad08d4615865dbc13f743a.tar.xz | |
dm bufio: use multi-page bio vector
The kernel supports multi page bio vector entries, so we can use them
in dm-bufio as an optimization.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@kernel.org>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-bufio.c | 24 |
1 files changed, 4 insertions, 20 deletions
diff --git a/drivers/md/dm-bufio.c b/drivers/md/dm-bufio.c index cca43ed13fd1..ae552644a0b4 100644 --- a/drivers/md/dm-bufio.c +++ b/drivers/md/dm-bufio.c @@ -1312,19 +1312,14 @@ static void use_bio(struct dm_buffer *b, enum req_op op, sector_t sector, { struct bio *bio; char *ptr; - unsigned int vec_size, len; + unsigned int len; - vec_size = b->c->block_size >> PAGE_SHIFT; - if (unlikely(b->c->sectors_per_block_bits < PAGE_SHIFT - SECTOR_SHIFT)) - vec_size += 2; - - bio = bio_kmalloc(vec_size, GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN); + bio = bio_kmalloc(1, GFP_NOWAIT | __GFP_NORETRY | __GFP_NOWARN); if (!bio) { -dmio: use_dmio(b, op, sector, n_sectors, offset); return; } - bio_init(bio, b->c->bdev, bio->bi_inline_vecs, vec_size, op); + bio_init(bio, b->c->bdev, bio->bi_inline_vecs, 1, op); bio->bi_iter.bi_sector = sector; bio->bi_end_io = bio_complete; bio->bi_private = b; @@ -1332,18 +1327,7 @@ dmio: ptr = (char *)b->data + offset; len = n_sectors << SECTOR_SHIFT; - do { - unsigned int this_step = min((unsigned int)(PAGE_SIZE - offset_in_page(ptr)), len); - - if (!bio_add_page(bio, virt_to_page(ptr), this_step, - offset_in_page(ptr))) { - bio_put(bio); - goto dmio; - } - - len -= this_step; - ptr += this_step; - } while (len > 0); + __bio_add_page(bio, virt_to_page(ptr), len, offset_in_page(ptr)); submit_bio(bio); } |