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Commit a578183e authored by Guoqing Jiang's avatar Guoqing Jiang Committed by Shaohua Li
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md-cluster: wakeup thread if activated a spare disk 



When a device is re-added, it will ultimately need
to be activated and that happens in md_check_recovery,
so we need to set MD_RECOVERY_NEEDED right after
remove_and_add_spares.

A specifical issue without the change is that when
one node perform fail/remove/readd on a disk, but
slave nodes could not add the disk back to array as
expected (added as missed instead of in sync). So
give slave nodes a chance to do resync.

Reviewed-by: default avatarNeilBrown <neilb@suse.com>
Signed-off-by: default avatarGuoqing Jiang <gqjiang@suse.com>
Signed-off-by: default avatarShaohua Li <shli@fb.com>
parent ab5a98b1

drivers/md/md.c

+5 −0
Original line number Diff line number Diff line
@@ -8694,6 +8694,11 @@ static void check_sb_changes(struct mddev *mddev, struct md_rdev *rdev) 
				ret = remove_and_add_spares(mddev, rdev2);

				pr_info("Activated spare: %s\n",

						bdevname(rdev2->bdev,b));

				/* wakeup mddev->thread here, so array could

				 * perform resync with the new activated disk */

				set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);

				md_wakeup_thread(mddev->thread);



			}

			/* device faulty

			 * We just want to do the minimum to mark the disk