File mkfs-default-4k-nodes.diff of Package btrfsprogs.4684
Upstream change, reverted to original value for the time being.
--- a/mkfs.c.orig 2013-11-26 18:14:57.603783743 +0100
+++ b/mkfs.c 2013-11-26 18:15:24.650014406 +0100
@@ -48,7 +48,7 @@ static u64 index_cnt = 2;
#define DEFAULT_MKFS_FEATURES (BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
-#define DEFAULT_MKFS_LEAF_SIZE 16384
+#define DEFAULT_MKFS_LEAF_SIZE 4096
struct directory_name_entry {
char *dir_name;