linux-kernel - Re: [PATCH 05/18] writeback: per task dirty rate limit

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Message-ID: <1315380716.11101.5.camel@twins>
Date:	Wed, 07 Sep 2011 09:31:56 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.cz>, Christoph Hellwig <hch@....de>,
	Dave Chinner <david@...morbit.com>,
	Greg Thelen <gthelen@...gle.com>,
	Minchan Kim <minchan.kim@...il.com>,
	Vivek Goyal <vgoyal@...hat.com>,
	Andrea Righi <arighi@...eler.com>,
	linux-mm <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/18] writeback: per task dirty rate limit

On Wed, 2011-09-07 at 09:04 +0800, Wu Fengguang wrote:

> So the sqrt naturally leads to less overheads and more N tolerance for
> large memory servers, which have large (thresh-freerun) gaps.

Thanks, and as you say its an initial guess, later refined using patch
14.
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