6 files changed, 46 insertions, 30 deletions

diff --git a/drivers/md/md.c b/drivers/md/md.c
index 177d2a7d7cea..fa608a1a5c20 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -3241,12 +3241,13 @@ static void md_do_sync(mddev_t *mddev)
         mddev_t *mddev2;
         unsigned int currspeed = 0,
                  window;
-        sector_t max_sectors,j;
+        sector_t max_sectors,j, io_sectors;
         unsigned long mark[SYNC_MARKS];
         sector_t mark_cnt[SYNC_MARKS];
         int last_mark,m;
         struct list_head *tmp;
         sector_t last_check;
+        int skipped = 0;
 
         /* just incase thread restarts... */
         if (test_bit(MD_RECOVERY_DONE, &mddev->recovery))
@@ -3312,7 +3313,7 @@ static void md_do_sync(mddev_t *mddev)
 
         if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery))
                 /* resync follows the size requested by the personality,
-                 * which default to physical size, but can be virtual size
+                 * which defaults to physical size, but can be virtual size
                  */
                 max_sectors = mddev->resync_max_sectors;
         else
@@ -3331,9 +3332,10 @@ static void md_do_sync(mddev_t *mddev)
                 j = mddev->recovery_cp;
         else
                 j = 0;
+        io_sectors = 0;
         for (m = 0; m < SYNC_MARKS; m++) {
                 mark[m] = jiffies;
-                mark_cnt[m] = j;
+                mark_cnt[m] = io_sectors;
         }
         last_mark = 0;
         mddev->resync_mark = mark[last_mark];
@@ -3358,21 +3360,29 @@ static void md_do_sync(mddev_t *mddev)
         }
 
         while (j < max_sectors) {
-                int sectors;
+                sector_t sectors;
 
-                sectors = mddev->pers->sync_request(mddev, j, currspeed < sysctl_speed_limit_min);
-                if (sectors < 0) {
+                skipped = 0;
+                sectors = mddev->pers->sync_request(mddev, j, &skipped,
+                                            currspeed < sysctl_speed_limit_min);
+                if (sectors == 0) {
                         set_bit(MD_RECOVERY_ERR, &mddev->recovery);
                         goto out;
                 }
-                atomic_add(sectors, &mddev->recovery_active);
+
+                if (!skipped) { /* actual IO requested */
+                        io_sectors += sectors;
+                        atomic_add(sectors, &mddev->recovery_active);
+                }
+
                 j += sectors;
                 if (j>1) mddev->curr_resync = j;
 
-                if (last_check + window > j || j == max_sectors)
+
+                if (last_check + window > io_sectors || j == max_sectors)
                         continue;
 
-                last_check = j;
+                last_check = io_sectors;
 
                 if (test_bit(MD_RECOVERY_INTR, &mddev->recovery) ||
                     test_bit(MD_RECOVERY_ERR, &mddev->recovery))
@@ -3386,7 +3396,7 @@ static void md_do_sync(mddev_t *mddev)
                         mddev->resync_mark = mark[next];
                         mddev->resync_mark_cnt = mark_cnt[next];
                         mark[next] = jiffies;
-                        mark_cnt[next] = j - atomic_read(&mddev->recovery_active);
+                        mark_cnt[next] = io_sectors - atomic_read(&mddev->recovery_active);
                         last_mark = next;
                 }
 
@@ -3413,7 +3423,8 @@ static void md_do_sync(mddev_t *mddev)
                 mddev->queue->unplug_fn(mddev->queue);
                 cond_resched();
 
-                currspeed = ((unsigned long)(j-mddev->resync_mark_cnt))/2/((jiffies-mddev->resync_mark)/HZ +1) +1;
+                currspeed = ((unsigned long)(io_sectors-mddev->resync_mark_cnt))/2
+                        /((jiffies-mddev->resync_mark)/HZ +1) +1;
 
                 if (currspeed > sysctl_speed_limit_min) {
                         if ((currspeed > sysctl_speed_limit_max) ||
@@ -3433,7 +3444,7 @@ static void md_do_sync(mddev_t *mddev)
         wait_event(mddev->recovery_wait, !atomic_read(&mddev->recovery_active));
 
         /* tell personality that we are finished */
-        mddev->pers->sync_request(mddev, max_sectors, 1);
+        mddev->pers->sync_request(mddev, max_sectors, &skipped, 1);
 
         if (!test_bit(MD_RECOVERY_ERR, &mddev->recovery) &&
             mddev->curr_resync > 2 &&
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 3f1280bbaf39..3c5c916cb09e 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1010,7 +1010,7 @@ static int init_resync(conf_t *conf)
  * that can be installed to exclude normal IO requests.
  */
 
-static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
+static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster)
 {
         conf_t *conf = mddev_to_conf(mddev);
         mirror_info_t *mirror;
@@ -1023,7 +1023,7 @@ static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
 
         if (!conf->r1buf_pool)
                 if (init_resync(conf))
-                        return -ENOMEM;
+                        return 0;
 
         max_sector = mddev->size << 1;
         if (sector_nr >= max_sector) {
@@ -1107,8 +1107,8 @@ static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
                 /* There is nowhere to write, so all non-sync
                  * drives must be failed - so we are finished
                  */
-                int rv = max_sector - sector_nr;
-                md_done_sync(mddev, rv, 1);
+                sector_t rv = max_sector - sector_nr;
+                *skipped = 1;
                 put_buf(r1_bio);
                 rdev_dec_pending(conf->mirrors[disk].rdev, mddev);
                 return rv;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index bfc9f52f0ecf..8476515bfdc7 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1321,7 +1321,7 @@ static int init_resync(conf_t *conf)
  *
  */
 
-static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
+static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster)
 {
         conf_t *conf = mddev_to_conf(mddev);
         r10bio_t *r10_bio;
@@ -1335,7 +1335,7 @@ static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
 
         if (!conf->r10buf_pool)
                 if (init_resync(conf))
-                        return -ENOMEM;
+                        return 0;
 
  skipped:
         max_sector = mddev->size << 1;
@@ -1343,15 +1343,15 @@ static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
                 max_sector = mddev->resync_max_sectors;
         if (sector_nr >= max_sector) {
                 close_sync(conf);
+                *skipped = 1;
                 return sectors_skipped;
         }
         if (chunks_skipped >= conf->raid_disks) {
                 /* if there has been nothing to do on any drive,
                  * then there is nothing to do at all..
                  */
-                sector_t sec = max_sector - sector_nr;
-                md_done_sync(mddev, sec, 1);
-                return sec + sectors_skipped;
+                *skipped = 1;
+                return (max_sector - sector_nr) + sectors_skipped;
         }
 
         /* make sure whole request will fit in a chunk - if chunks
@@ -1565,17 +1565,22 @@ static int sync_request(mddev_t *mddev, sector_t sector_nr, int go_faster)
                 }
         }
 
+        if (sectors_skipped)
+                /* pretend they weren't skipped, it makes
+                 * no important difference in this case
+                 */
+                md_done_sync(mddev, sectors_skipped, 1);
+
         return sectors_skipped + nr_sectors;
  giveup:
         /* There is nowhere to write, so all non-sync
          * drives must be failed, so try the next chunk...
          */
         {
-        int sec = max_sector - sector_nr;
+        sector_t sec = max_sector - sector_nr;
         sectors_skipped += sec;
         chunks_skipped ++;
         sector_nr = max_sector;
-        md_done_sync(mddev, sec, 1);
         goto skipped;
         }
 }
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 677ce49078da..1ce3f5aaa984 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1477,7 +1477,7 @@ static int make_request (request_queue_t *q, struct bio * bi)
 }
 
 /* FIXME go_faster isn't used */
-static int sync_request (mddev_t *mddev, sector_t sector_nr, int go_faster)
+static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster)
 {
         raid5_conf_t *conf = (raid5_conf_t *) mddev->private;
         struct stripe_head *sh;
@@ -1500,8 +1500,8 @@ static int sync_request (mddev_t *mddev, sector_t sector_nr, int go_faster)
          * nothing we can do.
          */
         if (mddev->degraded >= 1 && test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
-                int rv = (mddev->size << 1) - sector_nr;
-                md_done_sync(mddev, rv, 1);
+                sector_t rv = (mddev->size << 1) - sector_nr;
+                *skipped = 1;
                 return rv;
         }
 
diff --git a/drivers/md/raid6main.c b/drivers/md/raid6main.c
index fede16c4e8f3..d9c385496dc5 100644
--- a/drivers/md/raid6main.c
+++ b/drivers/md/raid6main.c
@@ -1636,7 +1636,7 @@ static int make_request (request_queue_t *q, struct bio * bi)
 }
 
 /* FIXME go_faster isn't used */
-static int sync_request (mddev_t *mddev, sector_t sector_nr, int go_faster)
+static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster)
 {
         raid6_conf_t *conf = (raid6_conf_t *) mddev->private;
         struct stripe_head *sh;
@@ -1659,8 +1659,8 @@ static int sync_request (mddev_t *mddev, sector_t sector_nr, int go_faster)
          * nothing we can do.
          */
         if (mddev->degraded >= 2 && test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) {
-                int rv = (mddev->size << 1) - sector_nr;
-                md_done_sync(mddev, rv, 1);
+                sector_t rv = (mddev->size << 1) - sector_nr;
+                *skipped = 1;
                 return rv;
         }
 
diff --git a/include/linux/raid/md_k.h b/include/linux/raid/md_k.h
index d92db54255a3..bce0032decff 100644
--- a/include/linux/raid/md_k.h
+++ b/include/linux/raid/md_k.h
@@ -298,7 +298,7 @@ struct mdk_personality_s
         int (*hot_add_disk) (mddev_t *mddev, mdk_rdev_t *rdev);
         int (*hot_remove_disk) (mddev_t *mddev, int number);
         int (*spare_active) (mddev_t *mddev);
-        int (*sync_request)(mddev_t *mddev, sector_t sector_nr, int go_faster);
+        sector_t (*sync_request)(mddev_t *mddev, sector_t sector_nr, int *skipped, int go_faster);
         int (*resize) (mddev_t *mddev, sector_t sectors);
         int (*reshape) (mddev_t *mddev, int raid_disks);
         int (*reconfig) (mddev_t *mddev, int layout, int chunk_size);