linux-kernel - Re: [RFC][PATCH] avoid swapping out with swappiness==0

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Message-ID: <alpine.DEB.2.00.1204260948520.16059@router.home>
Date:	Thu, 26 Apr 2012 09:50:19 -0500 (CDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Richard Davies <richard@...chsys.com>
cc:	Satoru Moriya <satoru.moriya@....com>,
	KOSAKI Motohiro <kosaki.motohiro@...il.com>,
	Jerome Marchand <jmarchan@...hat.com>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	"jweiner@...hat.com" <jweiner@...hat.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"riel@...hat.com" <riel@...hat.com>,
	"lwoodman@...hat.com" <lwoodman@...hat.com>,
	"shaohua.li@...el.com" <shaohua.li@...el.com>,
	"dle-develop@...ts.sourceforge.net" 
	<dle-develop@...ts.sourceforge.net>,
	Seiji Aguchi <seiji.aguchi@....com>,
	Minchan Kim <minchan.kim@...il.com>
Subject: Re: [RFC][PATCH] avoid swapping out with swappiness==0

On Tue, 24 Apr 2012, Richard Davies wrote:

> I strongly believe that Linux should have a way to turn off swapping unless
> absolutely necessary. This means that users like us can run with swap
> present for emergency use, rather than having to disable it because of the
> side effects.

Agree. And this ooperation mode should be the default behavior given that
swapping is a very slow and tedious process these days.

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