linux-kernel - Re: [RFC][PATCH 1/2] Add explanation about min_free

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Message-ID: <alpine.DEB.2.00.1101071426010.23818@chino.kir.corp.google.com>
Date:	Fri, 7 Jan 2011 14:27:51 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Satoru Moriya <satoru.moriya@....com>
cc:	linux-mm@...ck.org, linux-kernel@...r.kernel.org,
	linux-doc@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Randy Dunlap <rdunlap@...otime.net>,
	dle-develop@...ts.sourceforge.net,
	Seiji Aguchi <seiji.aguchi@....com>
Subject: Re: [RFC][PATCH 1/2] Add explanation about min_free_kbytes to clarify
 its effect

On Fri, 7 Jan 2011, Satoru Moriya wrote:

> diff --git a/Documentation/sysctl/vm.txt b/Documentation/sysctl/vm.txt
> index 30289fa..e10b279 100644
> --- a/Documentation/sysctl/vm.txt
> +++ b/Documentation/sysctl/vm.txt
> @@ -349,7 +349,8 @@ min_free_kbytes:
>  
>  This is used to force the Linux VM to keep a minimum number
>  of kilobytes free.  The VM uses this number to compute a
> -watermark[WMARK_MIN] value for each lowmem zone in the system.
> +watermark[WMARK_MIN] for each lowmem zone and
> +watermark[WMARK_LOW/WMARK_HIGH] for each zone in the system.
>  Each lowmem zone gets a number of reserved free pages based
>  proportionally on its size.
>  

WMARK_MIN is changed for all zones.
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