From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
Subject: Re: [PATCH 01/35] writeback: enabling gate limit for light dirtied
 bdi
Date: Thu, 13 Jan 2011 20:26:10 +0100
Message-ID: <1294946770.30950.19.camel@laptop>
References: <20101213144646.341970461@intel.com>
	 <20101213150326.480108782@intel.com> <20110112214303.GC14260@quack.suse.cz>
	 <20110113034401.GB7840@localhost>
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Cc: Jan Kara <jack@suse.cz>, Andrew Morton <akpm@linux-foundation.org>, Rik
 van Riel <riel@redhat.com>, Christoph Hellwig <hch@lst.de>, Trond Myklebust
 <Trond.Myklebust@netapp.com>, Dave Chinner <david@fromorbit.com>, Theodore
 Ts'o <tytso@mit.edu>, Chris Mason <chris.mason@oracle.com>, Mel Gorman
 <mel@csn.ul.ie>,  KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>, Greg
 Thelen <gthelen@google.com>, Minchan Kim <minchan.kim@gmail.com>, linux-mm
 <linux-mm@kvack.org>,  "linux-fsdevel@vger.kernel.org"
 <linux-fsdevel@vger.kernel.org>, LKML <linux-kernel@vger.kernel.org>
To: Wu Fengguang <fengguang.wu@intel.com>
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On Thu, 2011-01-13 at 11:44 +0800, Wu Fengguang wrote:
> When testing 10-disk JBOD setup, I
> find that bdi_dirty_limit fluctuations too much. So I'm considering
> use global_dirty_limit as control target.=20

Is this because the bandwidth is equal or larger than the dirty period?


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