From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 3 May 2002 15:24:58 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 3 May 2002 15:24:57 -0400 Received: from imladris.infradead.org ([194.205.184.45]:22281 "EHLO phoenix.infradead.org") by vger.kernel.org with ESMTP id ; Fri, 3 May 2002 15:24:56 -0400 Date: Fri, 3 May 2002 20:24:52 +0100 From: Christoph Hellwig To: "Richard B. Johnson" Cc: Tony Luck , linux-kernel@vger.kernel.org Subject: Re: Virtual address space exhaustion (was Discontigmem virt_to_page() ) Message-ID: <20020503202452.A31648@infradead.org> Mail-Followup-To: Christoph Hellwig , "Richard B. Johnson" , Tony Luck , linux-kernel@vger.kernel.org In-Reply-To: <20020503200958.A30548@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, May 03, 2002 at 03:17:35PM -0400, Richard B. Johnson wrote: > On Fri, 3 May 2002, Christoph Hellwig wrote: > > > On Fri, May 03, 2002 at 03:01:48PM -0400, Richard B. Johnson wrote: > > > The other Unix's I've become familiar are Sun-OS, the > > > > SunOS 5 uses separate address spaces on sparcv9 (32 and 64bit). > > The same is true for many Linux ports, e.g. sparc64 or s390. > > > > No no! I'm not talking about the physical address spaces. Many > CPUs have separate address spaces for separate functions. I'm > taking about the virtual address space that the process sees. > There are no holes in this virtual address space of SunOS, and > no "separate stuff" (I/O space) seen by a user-mode task. This thread was about separate user/kernel VIRTUAL address spaces. Not about holes, I/O spaces or other crap.