From: Christoph Hellwig <hch@lst.de>
Date: Fri, 30 Oct 2009 07:03:27 +0000 (+0100)
Subject: GFS2: add barrier/nobarrier mount options
X-Git-Tag: v2.6.33-rc1~410^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f25934c5f88655a8d5c3c40a540daed1f0e6dedc;p=pandora-kernel.git

GFS2: add barrier/nobarrier mount options

Currently gfs2 issues barrier unconditionally.  There are various reasons
to disable them, be that just for testing or for stupid devices flushing
large battert backed caches.  Add a nobarrier option that matches xfs and
btrfs for this.  Also add a symmetric barrier option to turn it back on
at remount time.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
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