linux-kernel - Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen

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Message-ID: <4A12B30D.9040002@redhat.com>
Date:	Tue, 19 May 2009 09:24:29 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Wu Fengguang <fengguang.wu@...el.com>
CC:	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Elladan <elladan@...imo.com>, Nick Piggin <npiggin@...e.de>,
	Johannes Weiner <hannes@...xchg.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"minchan.kim@...il.com" <minchan.kim@...il.com>
Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first	class
 citizen

Wu Fengguang wrote:

> Another (amazing) finding of the test is, only around 1/10 mapped pages
> are actively referenced in the absence of user activities.
> 
> Shall we protect the remaining 9/10 inactive ones? This is a question ;-)

I believe we already do, due to the active list not being
scanned if none of the streaming IO pages get promoted to
the active list.

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