diff -urpN linux-stage.orig/fs/ext4/super.c linux-stage/fs/ext4/super.c
--- linux-stage.orig/fs/ext4/super.c	2013-05-13 09:35:17.628478645 -0400
+++ linux-stage/fs/ext4/super.c	2013-05-13 09:46:08.062358974 -0400
@@ -1268,6 +1268,7 @@ enum {
 	Opt_extents, Opt_noextents,
 	Opt_no_mbcache,
	Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable,
+	Opt_max_dir_size_kb,
 };
 
 static const match_table_t tokens = {
@@ -1350,6 +1350,7 @@ static const match_table_t tokens = {
 	{Opt_init_itable, "init_itable=%u"},
 	{Opt_init_itable, "init_itable"},
 	{Opt_noinit_itable, "noinit_itable"},
+	{Opt_max_dir_size_kb, "max_dir_size_kb=%u"},
 	{Opt_err, NULL},
 };
 
@@ -1736,6 +1737,13 @@ set_qf_format:
 		case Opt_nodelalloc:
 			clear_opt(sbi->s_mount_opt, DELALLOC);
 			break;
+		case Opt_max_dir_size_kb:
+			if (match_int(&args[0], &option))
+				return 0;
+			if (option < 0)
+				return 0;
+			sbi->s_max_dir_size = option * 1024;
+			break;
 		case Opt_stripe:
 			if (match_int(&args[0], &option))
 				return 0;