diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bb29aeefcbd0ff528507a4b7e3e3c0e32c02bad4..a409ab6f30bc33375561d4cebc20c5e20f9435ba 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -819,6 +819,7 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 		else
 			generic_make_request(bio);
 		bio = next;
+		cond_resched();
 	}
 }