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

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Message-ID: <4A12B0D1.1070803@redhat.com>
Date:	Tue, 19 May 2009 09:14:57 -0400
From:	Rik van Riel <riel@...hat.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Wu Fengguang <fengguang.wu@...el.com>,
	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>,
	Christoph Lameter <cl@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	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

Pekka Enberg wrote:

> Why do we need to skip JIT'd code? There are plenty of desktop
> applications that use Mono, for example, and it would be nice if we
> gave them the same treatment as native applications. Likewise, I am
> sure all browsers that use JIT for JavaScript need to be considered.

JIT'd code lives in anonymous pages, which are already
protected from streaming file IO because they live on
the anonymous LRUs.

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