diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 986e238..7fa73a3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2241,7 +2241,7 @@
 	 * start pushing delalloc when 1/2 of free blocks are dirty.
 	 */
 	if (free_blocks < 2 * dirty_blocks)
-		writeback_inodes_sb_if_idle(sb);
+		writeback_inodes_sb_if_idle(sb, WB_REASON_FS_FREE_SPACE);
 
 	return 0;
 }