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authorMike Snitzer <snitzer@redhat.com>2017-12-11 16:08:54 -0500
committerMike Snitzer <snitzer@redhat.com>2017-12-20 10:51:13 -0500
commitd07a241d4f9aaab61b4a2ce7ec8053ad429c4232 (patch)
tree43eb0150223b90f83e18ffbc68e926e0fdca9a5b /drivers/md
parentd0442f8039ee54716dd3f3100cfd8e11d9a2486c (diff)
downloadlinux-d07a241d4f9aaab61b4a2ce7ec8053ad429c4232.tar.bz2
dm mpath: optimize retrieval of bio_details from per-bio-data
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-mpath.c8
1 files changed, 3 insertions, 5 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index a3acbfb638be..40d721df11d3 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -264,19 +264,17 @@ static struct dm_mpath_io *get_mpio_from_bio(struct bio *bio)
return dm_per_bio_data(bio, multipath_per_bio_data_size());
}
-static struct dm_bio_details *get_bio_details_from_bio(struct bio *bio)
+static struct dm_bio_details *get_bio_details_from_mpio(struct dm_mpath_io *mpio)
{
/* dm_bio_details is immediately after the dm_mpath_io in bio's per-bio-data */
- struct dm_mpath_io *mpio = get_mpio_from_bio(bio);
void *bio_details = mpio + 1;
-
return bio_details;
}
static void multipath_init_per_bio_data(struct bio *bio, struct dm_mpath_io **mpio_p)
{
struct dm_mpath_io *mpio = get_mpio_from_bio(bio);
- struct dm_bio_details *bio_details = get_bio_details_from_bio(bio);
+ struct dm_bio_details *bio_details = get_bio_details_from_mpio(mpio);
mpio->nr_bytes = bio->bi_iter.bi_size;
mpio->pgpath = NULL;
@@ -1554,7 +1552,7 @@ static int multipath_end_io_bio(struct dm_target *ti, struct bio *clone,
}
/* Queue for the daemon to resubmit */
- dm_bio_restore(get_bio_details_from_bio(clone), clone);
+ dm_bio_restore(get_bio_details_from_mpio(mpio), clone);
spin_lock_irqsave(&m->lock, flags);
bio_list_add(&m->queued_bios, clone);