Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 4 Dec 2001 13:37:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 4 Dec 2001 13:35:38 -0500 Received: from zeus.kernel.org ([204.152.189.113]:30201 "EHLO zeus.kernel.org") by vger.kernel.org with ESMTP id ; Tue, 4 Dec 2001 13:15:40 -0500 From: David Mosberger MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15373.4756.967721.930336@napali.hpl.hp.com> Date: Tue, 4 Dec 2001 10:14:44 -0800 To: Alan Cox Cc: davidm@hpl.hp.com, tony.luck@intel.com, arjanv@redhat.com (Arjan van de Ven), linux-kernel@vger.kernel.org, linux-ia64@linuxia64.org, marcelo@conectiva.com.br, davem@redhat.com Subject: Re: [Linux-ia64] patch to no longer use ia64's software mmu In-Reply-To: In-Reply-To: <15373.4236.462183.167170@napali.hpl.hp.com> X-Mailer: VM 6.76 under Emacs 20.4.1 Reply-To: davidm@hpl.hp.com X-URL: http://www.hpl.hp.com/personal/David_Mosberger/ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org >>>>> On Tue, 4 Dec 2001 18:19:55 +0000 (GMT), Alan Cox said: Alan> I don't see the need: GFP_DMA is the ISA DMA zone. pci_* API Alan> is used by everyone else [for 2.5]. >> Without a 4GB zone, you may end up creating bounce buffers >> needlessly for 32-bit capable DMA devices, no? Alan> Yes - but it becomes an implementation detail. Drivers don't Alan> go around asking for kmalloc in 4Gb zone anymore they ask for Alan> PCI memory that a 32bit pci address can hit. I'm sure a 4Gb Alan> zone is what will be there internally but you don't need Alan> GFP_4GBZONE as a visible driver detail. Oh, OK, we're in agreement then. When I looked at the zone stuff the last time, I didn't think you could have an internal 4GB zone without abusing an existing zone making some changes to the header files in linux/*.h, but perhaps I missed something. --david - 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/