From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 18 Dec 2001 14:09:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 18 Dec 2001 14:08:19 -0500 Received: from neon-gw-l3.transmeta.com ([63.209.4.196]:1029 "EHLO neon-gw.transmeta.com") by vger.kernel.org with ESMTP id ; Tue, 18 Dec 2001 14:07:37 -0500 To: linux-kernel@vger.kernel.org From: "H. Peter Anvin" Subject: Re: How to use >3G memory per process Date: 18 Dec 2001 11:07:27 -0800 Organization: Transmeta Corporation, Santa Clara CA Message-ID: <9vo45f$idr$1@cesium.transmeta.com> In-Reply-To: <200112181837.fBIIbUF02685@adsl-209-76-109-63.dsl.snfc21.pacbell.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Disclaimer: Not speaking for Transmeta in any way, shape, or form. Copyright: Copyright 2001 H. Peter Anvin - All Rights Reserved Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Followup to: <200112181837.fBIIbUF02685@adsl-209-76-109-63.dsl.snfc21.pacbell.net> By author: Wayne Whitney In newsgroup: linux.dev.kernel > > In mailing-lists.linux-kernel, you wrote: > > > [1] What need to be done for the kernel to support 3.5G or more user > > address space per process? > > On ia32, change the value of __PAGE_OFFSET (where kernel space starts) > in include/asm-i386/page.h. The size of kernel space must be a power > of 2, so you can change __PAGE_OFFSET from its default of 0xC0000000 > to either 0xE0000000 (reasonable) or 0xF0000000 (overboard ?). > You must also change the unlabeled value near the top of > arch/i386/vmlinux.lds to match the value of __PAGE_OFFSET. > Note that this does break the (old) initrd protocol. Compile your kernel monolithic. -hpa -- at work, in private! "Unix gives you enough rope to shoot yourself in the foot." http://www.zytor.com/~hpa/puzzle.txt