From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261288AbULBIDP (ORCPT ); Thu, 2 Dec 2004 03:03:15 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261307AbULBIDP (ORCPT ); Thu, 2 Dec 2004 03:03:15 -0500 Received: from vanessarodrigues.com ([192.139.46.150]:54671 "EHLO jaguar.mkp.net") by vger.kernel.org with ESMTP id S261288AbULBIDH (ORCPT ); Thu, 2 Dec 2004 03:03:07 -0500 To: William Lee Irwin III Cc: Arjan van de Ven , Andrew Morton , linux-kernel@vger.kernel.org Subject: Re: 2.6.10-rc2-mm4 References: <20041130095045.090de5ea.akpm@osdl.org> <1101837994.2640.67.camel@laptop.fenrus.org> <20041130102105.21750596.akpm@osdl.org> <1101839110.2640.69.camel@laptop.fenrus.org> <20041130184852.GI2714@holomorphy.com> From: Jes Sorensen Date: 02 Dec 2004 03:03:05 -0500 In-Reply-To: <20041130184852.GI2714@holomorphy.com> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >>>>> "William" == William Lee Irwin writes: William> On Tue, 2004-11-30 at 10:21 -0800, Andrew Morton wrote: >>> For pages which have a physical address <4G. I assume this was >>> motivated by the lack of an IOMMU on ia32e? William> On Tue, Nov 30, 2004 at 07:25:10PM +0100, Arjan van de Ven William> wrote: >> but there's the swiommu for those... so that can't be it >> realistically.... Is there code using the zone GFP mask yet ?? William> ZONE_NORMAL and ZONE_DMA are both too overloaded to handle William> the 4GB boundary. And it makes a lot of sense on more machine William> types than x86-64 (e.g. ia64, ia32 and others with 32-bit PCI William> but no zone representing it). Hardware that doesn't require the broken 24 bit ISA zone already uses ZONE_DMA for all 32 bit memory - ie. ia64 does this. It works even on the broken-beyond-repair Intel boxes without an IOMMU. Cheers, Jes