md/md-multipath: enable io accounting

use md_account_bio() to enable io accounting, also make sure
mddev_suspend() will wait for all io to be done.

Signed-off-by: Yu Kuai <yukuai3@huawei.com>
Reviewed-by: Xiao Ni <xni@redhat.com>
Signed-off-by: Song Liu <song@kernel.org>
Link: https://lore.kernel.org/r/20230621165110.1498313-7-yukuai1@huaweicloud.com

diff --git a/drivers/md/md-multipath.c b/drivers/md/md-multipath.c
index 92c45be..d222768 100644 (file)
--- a/drivers/md/md-multipath.c
+++ b/drivers/md/md-multipath.c
@@ -107,6 +107,7 @@ static bool multipath_make_request(struct mddev *mddev, struct bio * bio)
            && md_flush_request(mddev, bio))
                return true;
 
+       md_account_bio(mddev, &bio);
        mp_bh = mempool_alloc(&conf->pool, GFP_NOIO);
 
        mp_bh->master_bio = bio;