From: Miao Xie <miaox@cn.fujitsu.com>
Date: Thu, 15 Dec 2011 01:12:02 +0000 (-0500)
Subject: Btrfs: fix inaccurate available space on raid0 profile
X-Git-Tag: v3.2-rc6~4^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39fb26c398ddf8d7794a85e896cfe1a42e55524b;p=pandora-kernel.git

Btrfs: fix inaccurate available space on raid0 profile

When we use raid0 as the data profile, df command may show us a very
inaccurate value of the available space, which may be much less than the
real one. It may make the users puzzled. Fix it by changing the calculation
of the available space, and making it be more similar to a fake chunk
allocation.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
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