lustre/kernel_patches/patches/raid5-mmp-unplug-dev-3.9.patch

   1 Index: linux-3.10.0-799.el7.x86_64/drivers/md/raid5.c
   2 ===================================================================
   3 --- linux-3.10.0-799.el7.x86_64.orig/drivers/md/raid5.c
   4 +++ linux-3.10.0-799.el7.x86_64/drivers/md/raid5.c
   5 @@ -3096,7 +3096,9 @@ static int add_stripe_bio(struct stripe_
   6                 bi->bi_next = *bip;
   7         *bip = bi;
   8         raid5_inc_bi_active_stripes(bi);
   9         md_write_inc(conf->mddev, bi);
  10 +       if ((bi->bi_rw & REQ_SYNC) && !forwrite)
  11 +               clear_bit(R5_UPTODATE, &sh->dev[dd_idx].flags); /* force to read from disk. */
  12
  13         if (forwrite) {
  14                 /* check if page is covered */
  15 @@ -5548,6 +5550,9 @@ static void raid5_make_request(struct md
  16                                          bi, 0);
  17                 bio_endio(bi, 0);
  18         }
  19 +
  20 +       if (bi->bi_rw & REQ_SYNC)
  21 +               md_wakeup_thread(mddev->thread);
  22  }
  23
  24  static sector_t raid5_size(struct mddev *mddev, sector_t sectors, int raid_disks);