Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit d07a241d authored by Mike Snitzer's avatar Mike Snitzer
Browse files

dm mpath: optimize retrieval of bio_details from per-bio-data 



Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent d0442f80

drivers/md/dm-mpath.c

+3 −5
Original line number Diff line number Diff line
@@ -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);