1 Index: linux-3.10.0-957.el7.x86_64/drivers/md/raid5.c
2 ===================================================================
3 --- linux-3.10.0-957.el7.x86_64.orig/drivers/md/raid5.c
4 +++ linux-3.10.0-957.el7.x86_64/drivers/md/raid5.c
5 @@ -3266,6 +3266,8 @@ static int add_stripe_bio(struct stripe_
8 md_write_inc(conf->mddev, bi);
9 + if ((bi->bi_rw & REQ_SYNC) && !forwrite)
10 + clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); /* force to read from disk. */
13 /* check if page is covered */
14 @@ -5753,6 +5755,10 @@ static bool raid5_make_request(struct md
19 + if (bi->bi_rw & REQ_SYNC)
20 + md_wakeup_thread(mddev->thread);