File default-mkfs-features.patch of Package btrfsprogs

Index: btrfs-progs-v3.12/mkfs.c
===================================================================
--- btrfs-progs-v3.12.orig/mkfs.c
+++ btrfs-progs-v3.12/mkfs.c
@@ -46,7 +46,9 @@
 
 static u64 index_cnt = 2;
 
-#define DEFAULT_MKFS_FEATURES	(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
+#define DEFAULT_MKFS_FEATURES	(BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF		\
+				| BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA	\
+		)
 
 #define DEFAULT_MKFS_LEAF_SIZE 16384