From: Christoph Hellwig <hch@lst.de>
Date: Fri, 8 Jul 2011 12:36:36 +0000 (+0200)
Subject: xfs: avoid a few disk cache flushes
X-Git-Tag: v3.1-rc1~322^2~21
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e163cbde981c5988c3e80ca29589132336f18a72;p=pandora-kernel.git

xfs: avoid a few disk cache flushes

There is no need for a pre-flush when doing writing the second part of a
split log buffer, and if we are using an external log there is no need
to do a full cache flush of the log device at all given that all writes
to it use the FUA flag.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Alex Elder <aelder@sgi.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
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