From bce4eae9864e6b6ebde5d7f05576ff0a6c3724d0 Mon Sep 17 00:00:00 2001
From: Chris Mason <chris.mason@oracle.com>
Date: Thu, 24 Apr 2008 14:42:46 -0400
Subject: [PATCH] Btrfs: Fix balance_level to free the middle block if there is
 room in the left one

balance level starts by trying to empty the middle block, and then
pushes from the right to the middle.  This might empty the right block
and leave a small number of pointers in the middle.

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