From: Dave Chinner <david@fromorbit.com>
Date: Mon, 11 Jan 2010 11:49:59 +0000 (+0000)
Subject: xfs: Don't wake xfsbufd when idle
X-Git-Tag: v2.6.34-rc1~278^2~47
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c9c129714e71c890bed1bd5b61697a896c3c2d54;p=pandora-kernel.git

xfs: Don't wake xfsbufd when idle

The xfsbufd wakes every xfsbufd_centisecs (once per second by
default) for each filesystem even when the filesystem is idle.  If
the xfsbufd has nothing to do, put it into a long term sleep and
only wake it up when there is work pending (i.e. dirty buffers to
flush soon). This will make laptop power misers happy.

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

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