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authorMing Lei <tom.leiming@gmail.com>2017-02-14 16:29:03 +0100
committerShaohua Li <shli@fb.com>2017-02-15 20:24:54 +0100
commitd7a1030839d35c04a620e841f406b9b2a8600041 (patch)
tree293b09d7b92528436daa8953c9202cf669702037 /drivers
parentmd: remove unnecessary check on mddev (diff)
downloadlinux-d7a1030839d35c04a620e841f406b9b2a8600041.tar.xz
linux-d7a1030839d35c04a620e841f406b9b2a8600041.zip
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')
-rw-r--r--drivers/md/faulty.c2
-rw-r--r--drivers/md/md.c7
-rw-r--r--drivers/md/md.h2
-rw-r--r--drivers/md/raid1.c10
-rw-r--r--drivers/md/raid10.c11
-rw-r--r--drivers/md/raid5.c4
6 files changed, 14 insertions, 22 deletions
diff --git a/drivers/md/faulty.c b/drivers/md/faulty.c
index 685aa2d77e25..b0536cfd8e17 100644
--- a/drivers/md/faulty.c
+++ b/drivers/md/faulty.c
@@ -214,7 +214,7 @@ static void faulty_make_request(struct mddev *mddev, struct bio *bio)
}
}
if (failit) {
- struct bio *b = bio_clone_mddev(bio, GFP_NOIO, mddev);
+ struct bio *b = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
b->bi_bdev = conf->rdev->bdev;
b->bi_private = bio;
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 0e408bc67904..55e7e7a8714e 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -190,13 +190,6 @@ struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs,
}
EXPORT_SYMBOL_GPL(bio_alloc_mddev);
-struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask,
- struct mddev *mddev)
-{
- return bio_clone_bioset(bio, gfp_mask, mddev->bio_set);
-}
-EXPORT_SYMBOL_GPL(bio_clone_mddev);
-
/*
* We have a system wide 'event count' that is incremented
* on any 'interesting' event, and readers of /proc/mdstat
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 42f8398181a8..b8859cbf84b6 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -673,8 +673,6 @@ extern void md_rdev_clear(struct md_rdev *rdev);
extern void mddev_suspend(struct mddev *mddev);
extern void mddev_resume(struct mddev *mddev);
-extern struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask,
- struct mddev *mddev);
extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs,
struct mddev *mddev);
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;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 1920756828df..ade7d69234d5 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1132,7 +1132,7 @@ read_again:
}
slot = r10_bio->read_slot;
- read_bio = bio_clone_mddev(bio, GFP_NOIO, mddev);
+ read_bio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
bio_trim(read_bio, r10_bio->sector - bio->bi_iter.bi_sector,
max_sectors);
@@ -1406,7 +1406,7 @@ retry_write:
int d = r10_bio->devs[i].devnum;
if (r10_bio->devs[i].bio) {
struct md_rdev *rdev = conf->mirrors[d].rdev;
- mbio = bio_clone_mddev(bio, GFP_NOIO, mddev);
+ mbio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
bio_trim(mbio, r10_bio->sector - bio->bi_iter.bi_sector,
max_sectors);
r10_bio->devs[i].bio = mbio;
@@ -1457,7 +1457,7 @@ retry_write:
smp_mb();
rdev = conf->mirrors[d].rdev;
}
- mbio = bio_clone_mddev(bio, GFP_NOIO, mddev);
+ mbio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
bio_trim(mbio, r10_bio->sector - bio->bi_iter.bi_sector,
max_sectors);
r10_bio->devs[i].repl_bio = mbio;
@@ -2565,7 +2565,7 @@ static int narrow_write_error(struct r10bio *r10_bio, int i)
if (sectors > sect_to_write)
sectors = sect_to_write;
/* Write at 'sector' for 'sectors' */
- wbio = bio_clone_mddev(bio, GFP_NOIO, mddev);
+ wbio = bio_clone_fast(bio, GFP_NOIO, mddev->bio_set);
bio_trim(wbio, sector - bio->bi_iter.bi_sector, sectors);
wsector = r10_bio->devs[i].addr + (sector - r10_bio->sector);
wbio->bi_iter.bi_sector = wsector +
@@ -2641,8 +2641,7 @@ read_more:
mdname(mddev),
bdevname(rdev->bdev, b),
(unsigned long long)r10_bio->sector);
- bio = bio_clone_mddev(r10_bio->master_bio,
- GFP_NOIO, mddev);
+ bio = bio_clone_fast(r10_bio->master_bio, GFP_NOIO, mddev->bio_set);
bio_trim(bio, r10_bio->sector - bio->bi_iter.bi_sector, max_sectors);
r10_bio->devs[slot].bio = bio;
r10_bio->devs[slot].rdev = rdev;
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index e2fa88fc6a1b..b193316804d4 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -5056,9 +5056,9 @@ static int raid5_read_one_chunk(struct mddev *mddev, struct bio *raid_bio)
return 0;
}
/*
- * use bio_clone_mddev to make a copy of the bio
+ * use bio_clone_fast to make a copy of the bio
*/
- align_bi = bio_clone_mddev(raid_bio, GFP_NOIO, mddev);
+ align_bi = bio_clone_fast(raid_bio, GFP_NOIO, mddev->bio_set);
if (!align_bi)
return 0;
/*