From: Tao Ma <tao.ma@oracle.com>
Date: Thu, 22 Jul 2010 05:56:45 +0000 (+0800)
Subject: ocfs2: Count more refcount records in file system fragmentation.
X-Git-Tag: v2.6.36-rc1~40^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a2e70c40ff58f82dde67770e6623ca45f0cb0c8;p=pandora-kernel.git

ocfs2: Count more refcount records in file system fragmentation.

The refcount record calculation in ocfs2_calc_refcount_meta_credits
is too optimistic that we can always allocate contiguous clusters
and handle an already existed refcount rec as a whole. Actually
because of file system fragmentation, we may have the chance to split
a refcount record into 3 parts during the transaction. So consider
the worst case in record calculation.

Cc: stable@kernel.org
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Joel Becker <joel.becker@oracle.com>
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