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, 8 Jan 2003 16:56:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Wed, 8 Jan 2003 16:56:58 -0500 Received: from holomorphy.com ([66.224.33.161]:7565 "EHLO holomorphy") by vger.kernel.org with ESMTP id ; Wed, 8 Jan 2003 16:56:58 -0500 Date: Wed, 8 Jan 2003 14:05:33 -0800 From: William Lee Irwin III To: Dave Hansen Cc: Linux Kernel Mailing List , linux-mm@kvack.org Subject: Re: [RFC][PATCH] allow bigger PAGE_OFFSET with PAE Message-ID: <20030108220533.GD23814@holomorphy.com> Mail-Followup-To: William Lee Irwin III , Dave Hansen , Linux Kernel Mailing List , linux-mm@kvack.org References: <3E1B334E.8030807@us.ibm.com> <20030107233713.GB23814@holomorphy.com> <3E1C9257.2040907@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3E1C9257.2040907@us.ibm.com> User-Agent: Mutt/1.3.25i Organization: The Domain of Holomorphy Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Jan 07, 2003 at 12:06:38PM -0800, Dave Hansen wrote: >>> Also, this gets the kernel's pagetables right, but neglects >>> userspace's for now. pgd_alloc() needs to be fixed to allocate >>> another PMD, if the split isn't PMD-alighed. William Lee Irwin III wrote: >> Um, that should be automatic when USER_PTRS_PER_PGD is increased. On Wed, Jan 08, 2003 at 01:04:23PM -0800, Dave Hansen wrote: > Nope, you need a little bit more. pgd_alloc() relies on its memcpy() > to provide the kernel mappings. After the last user PMD is allocated, > you still need to copy the kernel-shared part of it in. See the bit about rounding up. Then again, the pmd entries don't get filled in by any of that... Bill