Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261292AbVEQHQq (ORCPT ); Tue, 17 May 2005 03:16:46 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261300AbVEQHQq (ORCPT ); Tue, 17 May 2005 03:16:46 -0400 Received: from [80.247.74.3] ([80.247.74.3]:24247 "EHLO tavolara.isolaweb.it") by vger.kernel.org with ESMTP id S261292AbVEQHQn (ORCPT ); Tue, 17 May 2005 03:16:43 -0400 Message-Id: <6.2.1.2.2.20050517091317.09915810@mail.tekno-soft.it> X-Mailer: QUALCOMM Windows Eudora Version 6.2.1.2 Date: Tue, 17 May 2005 09:15:46 +0200 To: Nix From: Roberto Fichera Subject: Re: How to use memory over 4GB Cc: Eric Dumazet , linux-kernel@vger.kernel.org In-Reply-To: <87hdh2am9j.fsf@amaterasu.srvr.nix> 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> <4288AB6A.3060106@cosmosbay.com> <6.2.1.2.2.20050516164236.05922a30@mail.tekno-soft.it> <87hdh2am9j.fsf@amaterasu.srvr.nix> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed X-IsolaWeb-MailScanner-Information: Please contact the ISP for more information X-IsolaWeb-MailScanner: Found to be clean X-MailScanner-From: kernel@tekno-soft.it Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1251 Lines: 32 At 23.34 16/05/2005, Nix wrote: >On 16 May 2005, Roberto Fichera whispered secretively: > > At 16.17 16/05/2005, Eric Dumazet wrote: > >>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. > > > > ... any source code that explain better what you say ;-)! > > perhaps? Yes! I already know this patch ... I was asking for some user space code, just to show up the thinks ;-)! >(In a nutshell: it gives processes an extra 1Gb of virtual memory, at >the cost of making system calls --- and everything else that must >transition to kernel space --- *much* slower.) >- >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/ Roberto Fichera. - 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/