diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index d1b9bd5fd4f6cad04f4037ece137f43904f50de6..71a01a2e19381b08050ed19c2ebb2e1210f653bd 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1683,6 +1683,7 @@ static void raid1d(mddev_t *mddev)
 				generic_make_request(bio);
 			}
 		}
+		cond_resched();
 	}
 	if (unplug)
 		unplug_slaves(mddev);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 51c4c5c4d87add417a297714f7873df95979001d..69fc76caa469a9424a218db4e1217310919b4b17 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1632,6 +1632,7 @@ static void raid10d(mddev_t *mddev)
 				generic_make_request(bio);
 			}
 		}
+		cond_resched();
 	}
 	if (unplug)
 		unplug_slaves(mddev);