Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261223AbVEPORY (ORCPT ); Mon, 16 May 2005 10:17:24 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261663AbVEPORY (ORCPT ); Mon, 16 May 2005 10:17:24 -0400 Received: from gw1.cosmosbay.com ([62.23.185.226]:18644 "EHLO gw1.cosmosbay.com") by vger.kernel.org with ESMTP id S261223AbVEPORV (ORCPT ); Mon, 16 May 2005 10:17:21 -0400 Message-ID: <4288AB6A.3060106@cosmosbay.com> Date: Mon, 16 May 2005 16:17:14 +0200 From: Eric Dumazet User-Agent: Mozilla Thunderbird 1.0 (Windows/20041206) X-Accept-Language: fr, en MIME-Version: 1.0 To: Roberto Fichera CC: linux-kernel@vger.kernel.org Subject: Re: How to use memory over 4GB References: <6.2.1.2.2.20050516142516.0313e860@mail.tekno-soft.it> <428898CF.5060908@cosmosbay.com> <6.2.1.2.2.20050516151659.077cceb0@mail.tekno-soft.it> In-Reply-To: <6.2.1.2.2.20050516151659.077cceb0@mail.tekno-soft.it> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-1.6 (gw1.cosmosbay.com [172.16.8.80]); Mon, 16 May 2005 16:17:15 +0200 (CEST) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 684 Lines: 23 Roberto Fichera a ?crit : > >> But still you need a 4GB/4GB user/kernel split, because the standard >> is 3GB/1GB. > > > Why I need 4GB/4GB split? What are the beneficts? Well... 4GB for your process is better than 3GB, that's 33% more space... If your process is cpu bounded (and not issuing too many system calls), then 4GB/4GB split let it address more ram, reducing the need to shift windows in mmaped files for example. Eric - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/