md: Recovery speed is wrong

When we calculate the speed of recovery, the numerator that contains
the recovery done sectors.  It's need to subtract the sectors which
don't finish recovery.

Signed-off-by: Xiao Ni <xni@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.de>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 1379b1a3b9ff..eb8c93dff7c6 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -7376,7 +7376,7 @@ void md_do_sync(struct md_thread *thread)
         struct mddev *mddev2;
         unsigned int currspeed = 0,
                  window;
-        sector_t max_sectors,j, io_sectors;
+        sector_t max_sectors,j, io_sectors, recovery_done;
         unsigned long mark[SYNC_MARKS];
         unsigned long update_time;
         sector_t mark_cnt[SYNC_MARKS];
@@ -7652,7 +7652,8 @@ void md_do_sync(struct md_thread *thread)
                  */
                 cond_resched();
 
-                currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
+                recovery_done = io_sectors - atomic_read(&mddev->recovery_active);
+                currspeed = ((unsigned long)(recovery_done - mddev->resync_mark_cnt))/2
                         /((jiffies-mddev->resync_mark)/HZ +1) +1;
 
                 if (currspeed > speed_min(mddev)) {