linux-kernel - Re: [PATCH] mm: evict streaming IO cache first

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Message-Id: <20081117172202.343e1b35.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Mon, 17 Nov 2008 17:22:02 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com>
Cc:	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Rik van Riel" <riel@...hat.com>,
	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-mm <linux-mm@...ck.org>,
	"Gene Heskett" <gene.heskett@...il.com>
Subject: Re: [PATCH] mm: evict streaming IO cache first

On Mon, 17 Nov 2008 16:03:48 +0900
"KOSAKI Motohiro" <kosaki.motohiro@...fujitsu.com> wrote:
> > How about resetting zone->recent_scanned/rotated to be some value calculated from
> > INACTIVE_ANON/INACTIVE_FILE at some time (when the system is enough idle) ?
> 
> in get_scan_ratio()
> 
But active/inactive ratio (and mapped_ratio) is not handled there.

Follwoing 2 will return the same scan ratio.
==case 1==
  active_anon = 480M
  inactive_anon = 32M
  active_file = 2M
  inactive_file = 510M

==case 2==
  active_anon = 480M
  inactive_anon = 32M
  active_file = 480M
  inactive_file = 32M
==



-Kame


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