diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5930915..cfdc51e 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -2835,6 +2835,9 @@
 				err = -EIO;
 				break;
 			}
+			/* Yield here to deal with large extent trees.
+			 * Should be a no-op if we did IO above. */
+			cond_resched();
 			if (WARN_ON(i + 1 > depth)) {
 				err = -EIO;
 				break;