From cb723e491955ac11a1591ae25cada7c3b1470609 Mon Sep 17 00:00:00 2001
From: Josef Bacik <jbacik@fb.com>
Date: Wed, 18 Feb 2015 08:06:57 -0800
Subject: [PATCH] Btrfs: reserve space for block groups

This changes our delayed refs calculations to include the space needed
to write back dirty block groups.

Signed-off-by: Chris Mason <clm@fb.com>
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Reading git-format-patch failed