Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 23 Sep 2002 17:34:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 23 Sep 2002 17:34:16 -0400 Received: from pizda.ninka.net ([216.101.162.242]:53691 "EHLO pizda.ninka.net") by vger.kernel.org with ESMTP id ; Mon, 23 Sep 2002 17:34:15 -0400 Date: Mon, 23 Sep 2002 14:28:21 -0700 (PDT) Message-Id: <20020923.142821.50184745.davem@redhat.com> To: davidm@hpl.hp.com, davidm@napali.hpl.hp.com Cc: phillips@arcor.de, dmo@osdl.org, axboe@suse.de, _deepfire@mail.ru, linux-kernel@vger.kernel.org Subject: Re: DAC960 in 2.5.38, with new changes From: "David S. Miller" In-Reply-To: <15759.35002.179075.973994@napali.hpl.hp.com> References: <15759.34428.608321.969391@napali.hpl.hp.com> <15759.35002.179075.973994@napali.hpl.hp.com> X-Mailer: Mew version 2.1 on Emacs 21.1 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 824 Lines: 18 From: David Mosberger Date: Mon, 23 Sep 2002 14:33:46 -0700 >>>>> On Mon, 23 Sep 2002 23:31:13 +0200, Daniel Phillips said: Daniel> Why attempt to write 8 bytes on ia32 when only 4 are needed? Even on ia32 you'll need 8 bytes if the controller is operated in DAC mode (which is what you want for a machine with >4GB of memory), no? Right. But if we know the top 32-bits will always be zero (f.e. if CONFIG_HIGHMEM is disabled on x86) one might want to optimize this to avoid the first 32-bit store. - 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/