Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933428AbXHMWEs (ORCPT ); Mon, 13 Aug 2007 18:04:48 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756545AbXHMWEe (ORCPT ); Mon, 13 Aug 2007 18:04:34 -0400 Received: from cantor.suse.de ([195.135.220.2]:44806 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754796AbXHMWEd (ORCPT ); Mon, 13 Aug 2007 18:04:33 -0400 Date: Tue, 14 Aug 2007 00:58:41 +0200 From: Andi Kleen To: Christoph Lameter Cc: Andi Kleen , Mel Gorman , Lee.Schermerhorn@hp.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH 3/4] Embed zone_id information within the zonelist->zones pointer Message-ID: <20070813225841.GG3406@bingen.suse.de> References: <20070809210616.14702.73376.sendpatchset@skynet.skynet.ie> <200708102013.49170.ak@suse.de> <200708110304.55433.ak@suse.de> <20070813225020.GE3406@bingen.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1100 Lines: 38 On Mon, Aug 13, 2007 at 03:00:14PM -0700, Christoph Lameter wrote: > You said that ZONE_DMA will still be there right? So the zone will be There will be a (variable sized) dma zone, but not a ZONE_DMA entry in pgdat or in the the fallback lists. > > > There are still other architectures that use it. Biggest offender > > is s390. I'll leave them to their respective maintainers. > > IA64 also uses ZONE_DMA to support 32bit controllers. ZONE_DMA32 I thought? That one is not changed. > > So I think we can only get rid of ZONE_DMA in its 16MB incarnation for > i386 and x86_64. Correct. > > But you will be keeping ZONE_DMA32? Yes. > If so then it may be better to drop ZONE_DMA32 and make ZONE_DMA be below > 4GB like other 64bit arches. That might be possible as a followup, but would change the driver API. Is it worth it? -Andi - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/