+++ /dev/null
---- linux-3.10.0-685.el7.x86_64/drivers/md/raid5.c.orig 2017-06-28 14:06:00.627299582 -0700
-+++ linux-3.10.0-685.el7.x86_64/drivers/md/raid5.c 2017-06-28 14:08:01.564618793 -0700
-@@ -3090,6 +3090,8 @@ static int add_stripe_bio(struct stripe_
- bi->bi_next = *bip;
- *bip = bi;
- raid5_inc_bi_active_stripes(bi);
-+ if ((bi->bi_rw & REQ_SYNC) && !forwrite)
-+ clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); /* force to read from disk. */
-
- if (forwrite) {
- /* check if page is covered */
-@@ -5538,6 +5540,9 @@ static bool raid5_make_request(struct md
- bi, 0);
- bio_endio(bi, 0);
- }
-+
-+ if (bi->bi_rw & REQ_SYNC)
-+ md_wakeup_thread(mddev->thread);
- return true;
- }
-