5 files changed, 39 insertions, 5 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 1b1ef3130e6..9231cd700fe 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1348,14 +1348,38 @@ void bitmap_close_sync(struct bitmap *bitmap)
 	 */
 	sector_t sector = 0;
 	int blocks;
-	if (!bitmap) return;
+	if (!bitmap)
+		return;
 	while (sector < bitmap->mddev->resync_max_sectors) {
 		bitmap_end_sync(bitmap, sector, &blocks, 0);
-/*
-		if (sector < 500) printk("bitmap_close_sync: sec %llu blks %d\n",
-					 (unsigned long long)sector, blocks);
-*/		sector += blocks;
+		sector += blocks;
+	}
+}
+
+void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector)
+{
+	sector_t s = 0;
+	int blocks;
+
+	if (!bitmap)
+		return;
+	if (sector == 0) {
+		bitmap->last_end_sync = jiffies;
+		return;
+	}
+	if (time_before(jiffies, (bitmap->last_end_sync
+				  + bitmap->daemon_sleep * HZ)))
+		return;
+	wait_event(bitmap->mddev->recovery_wait,
+		   atomic_read(&bitmap->mddev->recovery_active) == 0);
+
+	sector &= ~((1ULL << CHUNK_BLOCK_SHIFT(bitmap)) - 1);
+	s = 0;
+	while (s < sector && s < bitmap->mddev->resync_max_sectors) {
+		bitmap_end_sync(bitmap, s, &blocks, 0);
+		s += blocks;
 	}
+	bitmap->last_end_sync = jiffies;
 }
 
 static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int needed)
@@ -1565,3 +1589,4 @@ EXPORT_SYMBOL(bitmap_start_sync);
 EXPORT_SYMBOL(bitmap_end_sync);
 EXPORT_SYMBOL(bitmap_unplug);
 EXPORT_SYMBOL(bitmap_close_sync);
+EXPORT_SYMBOL(bitmap_cond_end_sync);
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 4a69c416e04..e0b8d0dd7a8 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1684,6 +1684,7 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 	if (!go_faster && conf->nr_waiting)
 		msleep_interruptible(1000);
 
+	bitmap_cond_end_sync(mddev->bitmap, sector_nr);
 	raise_barrier(conf);
 
 	conf->next_resync = sector_nr;
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 5cdcc938620..ba125277c6c 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1670,6 +1670,8 @@ static sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *skipped, i
 	if (!go_faster && conf->nr_waiting)
 		msleep_interruptible(1000);
 
+	bitmap_cond_end_sync(mddev->bitmap, sector_nr);
+
 	/* Again, very different code for resync and recovery.
 	 * Both must result in an r10bio with a list of bios that
 	 * have bi_end_io, bi_sector, bi_bdev set,
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index e8c8157b02f..388a974d63e 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -3753,6 +3753,9 @@ static inline sector_t sync_request(mddev_t *mddev, sector_t sector_nr, int *ski
 		return sync_blocks * STRIPE_SECTORS; /* keep things rounded to whole stripes */
 	}
 
+
+	bitmap_cond_end_sync(mddev->bitmap, sector_nr);
+
 	pd_idx = stripe_to_pdidx(sector_nr, conf, raid_disks);
 	sh = get_active_stripe(conf, sector_nr, raid_disks, pd_idx, 1);
 	if (sh == NULL) {
diff --git a/include/linux/raid/bitmap.h b/include/linux/raid/bitmap.h
index 306a1d1a5af..e51b531cd0b 100644
--- a/include/linux/raid/bitmap.h
+++ b/include/linux/raid/bitmap.h
@@ -244,6 +244,8 @@ struct bitmap {
 	 */
 	unsigned long daemon_lastrun; /* jiffies of last run */
 	unsigned long daemon_sleep; /* how many seconds between updates? */
+	unsigned long last_end_sync; /* when we lasted called end_sync to
+				      * update bitmap with resync progress */
 
 	atomic_t pending_writes; /* pending writes to the bitmap file */
 	wait_queue_head_t write_wait;
@@ -275,6 +277,7 @@ void bitmap_endwrite(struct bitmap *bitmap, sector_t offset,
 int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, int *blocks, int degraded);
 void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, int *blocks, int aborted);
 void bitmap_close_sync(struct bitmap *bitmap);
+void bitmap_cond_end_sync(struct bitmap *bitmap, sector_t sector);
 
 void bitmap_unplug(struct bitmap *bitmap);
 void bitmap_daemon_work(struct bitmap *bitmap);