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Date: Tue, 19 May 2009 09:24:29 -0400
From: Rik van Riel <riel@redhat.com>
Organization: Red Hat, Inc
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To: Wu Fengguang <fengguang.wu@intel.com>
CC: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
       Christoph Lameter <cl@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>,
       LKML <linux-kernel@vger.kernel.org>, Elladan <elladan@eskimo.com>,
       Nick Piggin <npiggin@suse.de>, Johannes Weiner <hannes@cmpxchg.org>,
       Peter Zijlstra <peterz@infradead.org>, "tytso@mit.edu" <tytso@mit.edu>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
       "minchan.kim@gmail.com" <minchan.kim@gmail.com>
Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first	class
 citizen
References: <20090519161756.4EE4.A69D9226@jp.fujitsu.com> <20090519074925.GA690@localhost> <20090519170208.742C.A69D9226@jp.fujitsu.com> <20090519085354.GB2121@localhost>
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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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