From a6b6e75e096f436f0cc56edf5bca96301e194491 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Mon, 15 Oct 2007 16:22:39 -0400
Subject: [PATCH] Btrfs: Defrag only leaves, and only when the parent node has
 a single objectid

This allows us to defrag huge directories, but skip the expensive defrag
case in more common usage, where it does not help as much.

Signed-off-by: Chris Mason <chris.mason@oracle.com>
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