Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764194AbYCGPdY (ORCPT ); Fri, 7 Mar 2008 10:33:24 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755566AbYCGPdR (ORCPT ); Fri, 7 Mar 2008 10:33:17 -0500 Received: from one.firstfloor.org ([213.235.205.2]:33301 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755376AbYCGPdQ (ORCPT ); Fri, 7 Mar 2008 10:33:16 -0500 Date: Fri, 7 Mar 2008 16:34:50 +0100 From: Andi Kleen To: Rene Herman Cc: Andi Kleen , linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH] [0/13] General DMA zone rework Message-ID: <20080307153450.GH7365@one.firstfloor.org> References: <200803071007.493903088@firstfloor.org> <47D15CDF.5060501@keyaccess.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <47D15CDF.5060501@keyaccess.nl> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 985 Lines: 22 On Fri, Mar 07, 2008 at 04:18:55PM +0100, Rene Herman wrote: > On 07-03-08 10:07, Andi Kleen wrote: > > >it to any size needed (upto 2GB currently). The default sizing > >heuristics are for now the same as in the old code: by default > >all free memory below 16MB is put into the pool (in practice that > >is only ~8MB or so usable because the kernel is loaded there too) > > Just a side-comment -- not necessarily, given CONFIG_PHYSICAL_START. "In practice". People usually do not change that. Anyways the dma zone will be fully compatible. If you have moved your kernel outside the 16MB area and there is nothing else there (normally there is some other stuff there too) you'll get the full 16MB for the default compat pool. -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/