1 files changed, 20 insertions, 3 deletions

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 7aeceedcf7d4..c14dacdacfac 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1045,8 +1045,14 @@ void bitmap_daemon_work(struct bitmap *bitmap)
         if (bitmap == NULL)
                 return;
         if (time_before(jiffies, bitmap->daemon_lastrun + bitmap->daemon_sleep*HZ))
-                return;
+                goto done;
+
         bitmap->daemon_lastrun = jiffies;
+        if (bitmap->allclean) {
+                bitmap->mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;
+                return;
+        }
+        bitmap->allclean = 1;
 
         for (j = 0; j < bitmap->chunks; j++) {
                 bitmap_counter_t *bmc;
@@ -1068,8 +1074,10 @@ void bitmap_daemon_work(struct bitmap *bitmap)
                                         clear_page_attr(bitmap, page, BITMAP_PAGE_NEEDWRITE);
 
                                 spin_unlock_irqrestore(&bitmap->lock, flags);
-                                if (need_write)
+                                if (need_write) {
                                         write_page(bitmap, page, 0);
+                                        bitmap->allclean = 0;
+                                }
                                 continue;
                         }
 
@@ -1098,6 +1106,9 @@ void bitmap_daemon_work(struct bitmap *bitmap)
 /*
   if (j < 100) printk("bitmap: j=%lu, *bmc = 0x%x\n", j, *bmc);
 */
+                        if (*bmc)
+                                bitmap->allclean = 0;
+
                         if (*bmc == 2) {
                                 *bmc=1; /* maybe clear the bit next time */
                                 set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN);
@@ -1132,6 +1143,9 @@ void bitmap_daemon_work(struct bitmap *bitmap)
                 }
         }
 
+ done:
+        if (bitmap->allclean == 0)
+                bitmap->mddev->thread->timeout = bitmap->daemon_sleep * HZ;
 }
 
 static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap,
@@ -1226,6 +1240,7 @@ int bitmap_startwrite(struct bitmap *bitmap, sector_t offset, unsigned long sect
                         sectors -= blocks;
                 else sectors = 0;
         }
+        bitmap->allclean = 0;
         return 0;
 }
 
@@ -1296,6 +1311,7 @@ int bitmap_start_sync(struct bitmap *bitmap, sector_t offset, int *blocks,
                 }
         }
         spin_unlock_irq(&bitmap->lock);
+        bitmap->allclean = 0;
         return rv;
 }
 
@@ -1332,6 +1348,7 @@ void bitmap_end_sync(struct bitmap *bitmap, sector_t offset, int *blocks, int ab
         }
  unlock:
         spin_unlock_irqrestore(&bitmap->lock, flags);
+        bitmap->allclean = 0;
 }
 
 void bitmap_close_sync(struct bitmap *bitmap)
@@ -1399,7 +1416,7 @@ static void bitmap_set_memory_bits(struct bitmap *bitmap, sector_t offset, int n
                 set_page_attr(bitmap, page, BITMAP_PAGE_CLEAN);
         }
         spin_unlock_irq(&bitmap->lock);
-
+        bitmap->allclean = 0;
 }
 
 /* dirty the memory and file bits for bitmap chunks "s" to "e" */