linux-kernel - Re: [RFC PATCH 0/3] Do not wait the full timeout on congestion

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Date:	Fri, 27 Aug 2010 10:38:25 +0100
From:	Mel Gorman <mel@....ul.ie>
To:	Wu Fengguang <fengguang.wu@...el.com>
Cc:	Minchan Kim <minchan.kim@...il.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Christian Ehrhardt <ehrhardt@...ux.vnet.ibm.com>,
	Johannes Weiner <hannes@...xchg.org>, Jan Kara <jack@...e.cz>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Rik van Riel <riel@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Li Shaohua <shaohua.li@...el.com>
Subject: Re: [RFC PATCH 0/3] Do not wait the full timeout on
	congestion_wait when there is no congestion

On Fri, Aug 27, 2010 at 09:21:47AM +0800, Wu Fengguang wrote:
> Minchan,
> 
> It's much cleaner to keep the unchanged congestion_wait() and add a
> congestion_wait_check() for converting problematic wait sites. The
> too_many_isolated() wait is merely a protective mechanism, I won't
> bother to improve it at the cost of more code.
> 

This is what I've done. I dropped the patch again and am using
wait_iff_congested(). I left the too_many_isolated() callers as
congestion_wait().

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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