From: Christoph Hellwig <hch@infradead.org>
Date: Fri, 5 Feb 2010 09:57:55 +0000 (+0000)
Subject: xfs: optimize log flushing in xfs_fsync
X-Git-Tag: v2.6.34-rc1~278^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=180040b89ee2aed88c0a0b1fcf7ada9a512b12e3;p=pandora-kernel.git

xfs: optimize log flushing in xfs_fsync

If we have a pinned inode it must have a log item attached to it.
Usually that log item will have ili_last_lsn already set, in which
case we only need to flush the log up to that LSN instead of doing a
full log force.  This gives speedups of about 5% in some fsync heavy
workloads.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Alex Elder <aelder@sgi.com>
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