lustre/kernel_patches/patches/raid5-mmp-unplug-dev-sles12sp3.patch

   1 Index: linux-4.4.59-1/drivers/md/raid5.c
   2 ===================================================================
   3 --- linux-4.4.59-1.orig/drivers/md/raid5.c
   4 +++ linux-4.4.59-1/drivers/md/raid5.c
   5 @@ -3041,6 +3041,8 @@ static int add_stripe_bio(struct stripe_
   6                 bi->bi_next = *bip;
   7         *bip = bi;
   8         raid5_inc_bi_active_stripes(bi);
   9 +       if ((bi->bi_opf & REQ_SYNC) && !forwrite)
  10 +               clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); /* force to read from disk. */
  11
  12         if (forwrite) {
  13                 /* check if page is covered */
  14 @@ -5192,6 +5194,9 @@ static void make_discard_request(struct
  15                 md_write_end(mddev);
  16                 bio_endio(bi);
  17         }
  18 +
  19 +       if (bi->bi_opf & REQ_SYNC)
  20 +               md_wakeup_thread(mddev->thread);
  21  }
  22
  23  static void raid5_make_request(struct mddev *mddev, struct bio * bi)