Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751118AbWIXH0N (ORCPT ); Sun, 24 Sep 2006 03:26:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752183AbWIXH0N (ORCPT ); Sun, 24 Sep 2006 03:26:13 -0400 Received: from cantor2.suse.de ([195.135.220.15]:10893 "EHLO mx2.suse.de") by vger.kernel.org with ESMTP id S1751118AbWIXH0M (ORCPT ); Sun, 24 Sep 2006 03:26:12 -0400 From: Andi Kleen To: "Martin J. Bligh" Subject: Re: More thoughts on getting rid of ZONE_DMA Date: Sun, 24 Sep 2006 09:26:40 +0200 User-Agent: KMail/1.9.1 Cc: Christoph Lameter , Alan Cox , akpm@google.com, linux-kernel@vger.kernel.org, Christoph Hellwig , James Bottomley , linux-mm@kvack.org References: <4515EF28.9000805@mbligh.org> In-Reply-To: <4515EF28.9000805@mbligh.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200609240926.41208.ak@suse.de> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 664 Lines: 17 > If it's the 16MB DMA window for ia32 we're talking about, wouldn't > it be easier just to remove it from the fallback lists? (assuming > you have at least 128MB of memory or something, blah, blah). Saves > doing migration later. That is essentially already the case because the mm has special heuristics to preserve lower zones. Usually those tend to keep the 16MB mostly free unless you really use GFP_DMA. -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/