From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261274AbULBIBM (ORCPT ); Thu, 2 Dec 2004 03:01:12 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261288AbULBIBL (ORCPT ); Thu, 2 Dec 2004 03:01:11 -0500 Received: from vanessarodrigues.com ([192.139.46.150]:53391 "EHLO jaguar.mkp.net") by vger.kernel.org with ESMTP id S261274AbULBIBF (ORCPT ); Thu, 2 Dec 2004 03:01:05 -0500 To: Andrew Morton Cc: Arjan van de Ven , 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> From: Jes Sorensen Date: 02 Dec 2004 03:01:02 -0500 In-Reply-To: <20041130102105.21750596.akpm@osdl.org> 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 >>>>> "Andrew" == Andrew Morton writes: Andrew> Arjan van de Ven wrote: >> >> On Tue, 2004-11-30 at 09:50 -0800, Andrew Morton wrote: >> > >> http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.10-rc2/2.6.10-rc2-mm4/ >> > >> > - Various fixes and cleanups >> > >> > - A decent-sized x86_64 update. >> > >> > - x86_64 supports a fourth VM zone: ZONE_DMA32. This may affect >> memory > reclaim, but shouldn't. >> >> >> what is the purpose of such a zone ?? Andrew> For pages which have a physical address <4G. I assume this Andrew> was motivated by the lack of an IOMMU on ia32e? If we really need such a special case, wouldn't it be about time we introduced a mask based allocation API instead? There's hardware out there with 31 bit and 40 bit restrictions. Doing this solely for the sake of nvidia is certainly questionable. Regards, Jes