From owner-freebsd-questions@FreeBSD.ORG Thu Apr 9 09:40:56 2015 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id D8DC7531 for ; Thu, 9 Apr 2015 09:40:56 +0000 (UTC) Received: from nm28-vm10.bullet.mail.gq1.yahoo.com (nm28-vm10.bullet.mail.gq1.yahoo.com [98.136.216.169]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id A009C82A for ; Thu, 9 Apr 2015 09:40:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.es; s=s2048; t=1428572455; bh=aObGoKpSUsH1ae/ck0Xc5OBLg4hT4/PYXt+t3LTeSII=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From:Subject; b=O/eIcbQPly1L+srM6oZT1/HwcbLpXkjzYX/PuQ1lJAH7E/25qwJboJVSxhyQlG7QiiGrpsoQkrmqcl7bU5wyr1GplXZJjgXIewTASA77sj2V8ZA2fmyatNwC/fcmRnyF3galxvq69YZ0ErdosssPhfVqTQ0e2107kjFB8C+1d6xgL+2vv/gQvH3715gedT+RHG+oYEfym2IwbKhsJ53xQH3qG/AXLdVw7dS3SNOUDMXZDkBOFP9iFCbn5SwpkPQZuRUfocKNLT/iq/oo1dy8rUADFqq09c5YWrur5kHKtGpGx4+6VQzaIJDh22WYKOT6GGWTW/FL9ZF38bjXfkBOzg== Received: from [98.137.12.57] by nm28.bullet.mail.gq1.yahoo.com with NNFMP; 09 Apr 2015 09:40:55 -0000 Received: from [46.228.39.77] by tm2.bullet.mail.gq1.yahoo.com with NNFMP; 09 Apr 2015 09:40:55 -0000 Received: from [127.0.0.1] by smtp114.mail.ir2.yahoo.com with NNFMP; 09 Apr 2015 09:40:55 -0000 X-Yahoo-Newman-Id: 65426.99920.bm@smtp114.mail.ir2.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: qVBbT9YVM1mot8UFrRWOHFUS2a1I6WyfGuKtz43mforUsIF oxVxwL5eIg59qKxhX3NSG.vSBRrknhKjTKoPl8qRw8bWE6ACXwRxe.dEmf2K _Ow7XQav.4n8GrbMcd_sbJva4AmKFr0cHOsR1IALJly5WljKu4n.FJ5JMFTx vkNqpt0aS43bnRoTUNY3Erc7VF6tc4zR22Qnw1XL0mVYCC54UgDrXMlyuyjt yhZAdBk4uASg4eu03SFfxB3sQ89rWlviSmFcZGGUIPnGseDtsBBmM7cKFm7W RORDv5rqScEY793eqx9lHgtSgw..adiPmerkd2Oq7O95helJePCWNbdWfRah DAfn8FzP73l6J20EusLvH2b4o7a4WkFDIJxy_VxazgKnwgxJM4bj.2ioE9Q1 7myzmBu3iFjcpRGdBgR7TC1lzJg1.JokzH4GJpdexXuBFAWc1EFC6uikgrC9 YAwCTLfzJ06DSm4M8QTx1blLRgAHYipyArZtfJBEyBCL5WitcMJtWpuLhnw- - X-Yahoo-SMTP: mX392iiswBAeJNdO_s.EW62LZDJR Date: Thu, 9 Apr 2015 11:49:41 +0200 From: Eduardo Morras To: freebsd-questions@freebsd.org Subject: Re: How FreeBSD manage more than 4GB on 32 bits architecture Message-Id: <20150409114941.692910293a8120de4dafd400@yahoo.es> In-Reply-To: <5526408F.1090005@asim.lip6.fr> References: <5526408F.1090005@asim.lip6.fr> X-Mailer: Sylpheed 3.4.2 (GTK+ 2.24.27; amd64-portbld-freebsd9.3) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Pierre-Yves.Peneau@lip6.fr X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 09 Apr 2015 09:40:56 -0000 On Thu, 09 Apr 2015 11:04:15 +0200 Pierre-Yves P=E9neau wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA256 >=20 > Hi, >=20 > For my internship, I have to find a way to manage more than 4GB of > memory with 32 bits processors. It seems that the FreeBSD kernel is > the perfect candidate for that. According to the architecture handbook > (*), "FreeBSD could theoretically handle memory configurations up to > 8TB on a 32 bit platform." >=20 > For the last two days, I was looking for documentation, articles, > thesis, or e-mails on that topic, but I can't find relevant > informations. Is anybody have informations on that topic ? Where > should I start to read the source code to find my answers ? You are looking for PAE. Check https://www.freebsd.org/doc/faq/hardware.html#idp56343376 as starting= point. > Thank you in advance. >=20 >=20 > (*) https://www.freebsd.org/doc/en/books/arch-handbook/vm-kvm.html --- --- Eduardo Morras