From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Wed, 15 May 2002 08:57:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 15 May 2002 08:57:14 -0400 Received: from tomcat.admin.navo.hpc.mil ([204.222.179.33]:42359 "EHLO tomcat.admin.navo.hpc.mil") by vger.kernel.org with ESMTP id ; Wed, 15 May 2002 08:57:13 -0400 Date: Wed, 15 May 2002 07:57:13 -0500 (CDT) From: Jesse Pollard Message-Id: <200205151257.HAA75582@tomcat.admin.navo.hpc.mil> To: ashokr2@attbi.com, Subject: Re: Address space limits in IA32 linux X-Mailer: [XMailTool v3.1.2b] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org "Ashok Raj" : > > Hello > > what is the maximum addressible virtual address in a IA32 Linux system (4G?) > > typically since Database requires a larger address space, does linux kernel > has any config to limit this space for kernel, so that the user process has > more address to play with? > > thanks > ashok Of course - use IA64, Sparc, or PPC. IA32 is by definition limited to 4G. Just because the Kernel may, under extreem duress, access more by memory management shenanigans access more, user processes are ALWAYS limited to a 32 bit virtual address. Even this is more restricted, since shared libraries and other access limits it even more. Usually you can stretch it to 3G, but not over that. search the archives - the details are available. ------------------------------------------------------------------------- Jesse I Pollard, II Email: pollard@navo.hpc.mil Any opinions expressed are solely my own.