From mboxrd@z Thu Jan  1 00:00:00 1970
From: Peter Zijlstra <peterz@infradead.org>
Subject: Re: [PATCH 2/5] writeback: dirty position control
Date: Fri, 26 Aug 2011 15:18:21 +0200
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Cc: Vivek Goyal <vgoyal@redhat.com>,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Jan Kara <jack@suse.cz>, Christoph Hellwig <hch@lst.de>,
	Dave Chinner <david@fromorbit.com>,
	Greg Thelen <gthelen@google.com>,
	Minchan Kim <minchan.kim@gmail.com>,
	Andrea Righi <arighi@develer.com>,
	linux-mm <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>
To: Wu Fengguang <fengguang.wu@intel.com>
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On Fri, 2011-08-26 at 21:13 +0800, Wu Fengguang wrote:
> We got similar result as in the read disturber case, even though one
> disturbs N and the other impacts writeout bandwith.  The original
> patchset is consistently performing much better :) 

It does indeed, and I figure on these timescales it makes sense to
assumes N is a constant. Fair enough, thanks!