Btrfs: Default to 8k max packed tails

Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 1af2b65..4aacf99 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -289,7 +289,7 @@
 	 */
 	inline_size = end_pos;
 	if (isize >= BTRFS_MAX_INLINE_DATA_SIZE(root) ||
-	    inline_size > 16384 ||
+	    inline_size > 8192 ||
 	    inline_size >= BTRFS_MAX_INLINE_DATA_SIZE(root)) {
 		u64 last_end;