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

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Message-ID: <alpine.DEB.1.10.0905081022490.23875@qirst.com>
Date:	Fri, 8 May 2009 10:25:26 -0400 (EDT)
From:	Christoph Lameter <cl@...ux.com>
To:	Minchan Kim <minchan.kim@...il.com>
cc:	Wu Fengguang <fengguang.wu@...el.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Rik van Riel <riel@...hat.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tytso@....edu" <tytso@....edu>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	Elladan <elladan@...imo.com>, Nick Piggin <npiggin@...e.de>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>
Subject: Re: [PATCH -mm] vmscan: make mapped executable pages the first class
 citizen

On Fri, 8 May 2009, Minchan Kim wrote:

> > > Why did you said that "The page_referenced() path will only cover the ""_text_"" section" ?
> > > Could you elaborate please ?
> >
> > I was under the wild assumption that only the _text_ section will be
> > PROT_EXEC mapped.  No?
>
> Yes. I support your idea.

Why do PROT_EXEC mapped segments deserve special treatment? What about the
other memory segments of the process? Essentials like stack, heap and
data segments of the libraries?

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