From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932229AbWGDMCr (ORCPT ); Tue, 4 Jul 2006 08:02:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932230AbWGDMCr (ORCPT ); Tue, 4 Jul 2006 08:02:47 -0400 Received: from pentafluge.infradead.org ([213.146.154.40]:41367 "EHLO pentafluge.infradead.org") by vger.kernel.org with ESMTP id S932229AbWGDMCr (ORCPT ); Tue, 4 Jul 2006 08:02:47 -0400 Date: Tue, 4 Jul 2006 13:02:42 +0100 From: Christoph Hellwig To: Christoph Lameter Cc: Christoph Hellwig , linux-kernel@vger.kernel.org, akpm@osdl.org, Hugh Dickins , Con Kolivas , Marcelo Tosatti , Nick Piggin , Andi Kleen Subject: Re: [RFC 0/8] Reduce MAX_NR_ZONES and remove useless zones. Message-ID: <20060704120242.GA3386@infradead.org> Mail-Followup-To: Christoph Hellwig , Christoph Lameter , linux-kernel@vger.kernel.org, akpm@osdl.org, Hugh Dickins , Con Kolivas , Marcelo Tosatti , Nick Piggin , Andi Kleen References: <20060703215534.7566.8168.sendpatchset@schroedinger.engr.sgi.com> <20060703221712.GB14273@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.1i X-SRS-Rewrite: SMTP reverse-path rewritten from by pentafluge.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jul 03, 2006 at 04:26:57PM -0700, Christoph Lameter wrote: > > Which btw is utterly wrong. It should have a 4GB ZONE_DMA32 and everything > > else in ZONE_NORMAL. > > So we want to change the definition of ZONE_DMA to refer to the first 16MB > only? ZONE_DMA32 is always a 4GB border? The definition of ZONE_DMA32 is to be te 32bit border. I think we should implement it wherever possible but at least on all architectures that maybe have non-iommu implementations. ZONE_DMA should be an arch-specific low memory zone.