diff options
Diffstat (limited to 'drivers/md/raid1-10.c')
| -rw-r--r-- | drivers/md/raid1-10.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/md/raid1-10.c b/drivers/md/raid1-10.c index 21b0ff3ca4f0..52469e460dab 100644 --- a/drivers/md/raid1-10.c +++ b/drivers/md/raid1-10.c @@ -132,9 +132,18 @@ static inline bool raid1_add_bio_to_plug(struct mddev *mddev, struct bio *bio, blk_plug_cb_fn unplug) { struct raid1_plug_cb *plug = NULL; - struct blk_plug_cb *cb = blk_check_plugged(unplug, mddev, - sizeof(*plug)); + struct blk_plug_cb *cb; + + /* + * If bitmap is not enabled, it's safe to submit the io directly, and + * this can get optimal performance. + */ + if (!md_bitmap_enabled(mddev->bitmap)) { + raid1_submit_write(bio); + return true; + } + cb = blk_check_plugged(unplug, mddev, sizeof(*plug)); if (!cb) return false; |