From owner-freebsd-questions@FreeBSD.ORG  Mon Jul  2 01:39:51 2007
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52])
	by hub.freebsd.org (Postfix) with ESMTP id DFD1816A400
	for <freebsd-questions@freebsd.org>;
	Mon,  2 Jul 2007 01:39:51 +0000 (UTC) (envelope-from cswiger@mac.com)
Received: from pi.codefab.com (pi.codefab.com [199.103.21.227])
	by mx1.freebsd.org (Postfix) with ESMTP id B464413C447
	for <freebsd-questions@freebsd.org>;
	Mon,  2 Jul 2007 01:39:51 +0000 (UTC) (envelope-from cswiger@mac.com)
Received: from localhost (localhost [127.0.0.1])
	by pi.codefab.com (Postfix) with ESMTP id 30E6C5EAE;
	Sun,  1 Jul 2007 21:39:51 -0400 (EDT)
X-Virus-Scanned: amavisd-new at codefab.com
Received: from pi.codefab.com ([127.0.0.1])
	by localhost (pi.codefab.com [127.0.0.1]) (amavisd-new, port 10024)
	with ESMTP id RjYX+CbtBxN8; Sun,  1 Jul 2007 21:39:48 -0400 (EDT)
Received: from [192.168.1.130] (pool-96-224-41-41.nycmny.east.verizon.net
	[96.224.41.41])
	(using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits))
	(No client certificate requested)
	by pi.codefab.com (Postfix) with ESMTP id 1FB805CB7;
	Sun,  1 Jul 2007 21:39:48 -0400 (EDT)
Message-ID: <46885761.9050302@mac.com>
Date: Sun, 01 Jul 2007 21:39:45 -0400
From: Chuck Swiger <cswiger@mac.com>
User-Agent: Thunderbird 1.5.0.12 (Windows/20070509)
MIME-Version: 1.0
To: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
References: <20070701203720.X64116@wojtek.tensor.gdynia.pl>
In-Reply-To: <20070701203720.X64116@wojtek.tensor.gdynia.pl>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-questions@freebsd.org
Subject: Re: large pages
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Mon, 02 Jul 2007 01:39:52 -0000

Wojciech Puchar wrote:
> does FreeBSD {can,will,patch exist} supports using huge pages? i mean 2M 
> pages on AMD64 and 2/4M pages on i386

I believe so, yes-- isn't this what the PAE kernel option does?

> i need freebsd just for running one program needing about 1280 megs of 
> data space (+1-2 meg of code stacks etc. can be normally mapped). 
> everything else is just using less than 1% of power.
> 
> with 1536MB AMD64 machine it would be nice for FreeBSD to boot seeing 
> 256 megs for itself and allowing 1280 megs to be mapped&locked to just 
> one program.

Hmm.  Doesn't FreeBSD's default VM behavior do just fine dealing with one 
large active process without any unusual tuning?

-- 
-Chuck