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 11:04:01.000000000 -0400
+++ linux-stage/fs/ext4/super.c	2013-05-13 11:05:23.000000000 -0400
@@ -1369,6 +1369,7 @@ 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 = {
@@ -1453,6 +1454,7 @@ 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},
 };
 
@@ -1871,6 +1873,13 @@ set_qf_format:
 		case Opt_nomblk_io_submit:
 			clear_opt(sb, MBLK_IO_SUBMIT);
 			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;