linux-kernel - Re: [RFC][PATCH] the proposal of improve page reclaim by throttle

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Message-ID: <2f11576a0802210255k1e3acad7n87814e916fd24509@mail.gmail.com>
Date:	Thu, 21 Feb 2008 19:55:39 +0900
From:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
To:	"minchan Kim" <barrioskmc@...il.com>
Cc:	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>,
	"Balbir Singh" <balbir@...ux.vnet.ibm.com>,
	"Rik van Riel" <riel@...hat.com>,
	"Lee Schermerhorn" <Lee.Schermerhorn@...com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] the proposal of improve page reclaim by throttle

Hi Kim-san,

Thank you very much.
btw, what different between <test 1> and <test 2>?

>  It was a very interesting result.
>  In embedded system, your patch improve performance a little in case
>  without noswap(normal case in embedded system).
>  But, more important thing is OOM occured when I made 240 process
>  without swap device and vanilla kernel.
>  Then, I applied your patch, it worked very well without OOM.

Wow, it is very interesting result!
I am very happy.

>  I think that's why zone's page_scanned was six times greater than
>  number of lru pages.
>  At result, OOM happened.

please repost question with change subject.
i don't know reason of vanilla kernel behavior, sorry.
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