Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751471Ab0BYFPl (ORCPT ); Thu, 25 Feb 2010 00:15:41 -0500 Received: from hera.kernel.org ([140.211.167.34]:34641 "EHLO hera.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750747Ab0BYFPk (ORCPT ); Thu, 25 Feb 2010 00:15:40 -0500 Message-ID: <4B8609CE.5000705@kernel.org> Date: Thu, 25 Feb 2010 14:25:34 +0900 From: Tejun Heo User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.5) Gecko/20091130 SUSE/3.0.0-1.1.1 Thunderbird/3.0 MIME-Version: 1.0 To: Oliver Neukum CC: Yuhong Bao , hancockrwd@gmail.com, david-b@pacbell.net, greg@kroah.com, linux-kernel@vger.kernel.org, linux-usb@vger.kernel.org Subject: Re: [PATCH 2.6.34] ehci-hcd: add option to enable 64-bit DMA support References: <4B7CAF95.6020306@gmail.com> <4B85EE88.5050506@kernel.org> <201002250503.09327.oliver@neukum.org> In-Reply-To: <201002250503.09327.oliver@neukum.org> X-Enigmail-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.3 (hera.kernel.org [127.0.0.1]); Thu, 25 Feb 2010 05:15:33 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 761 Lines: 23 On 02/25/2010 01:03 PM, Oliver Neukum wrote: > Am Donnerstag, 25. Februar 2010 04:29:12 schrieb Tejun Heo: >> Arghhh.... I hate when intel pulls this type of 'product >> differentiation' stunts. At any rate, I'm doubtful swiotlb'ing for >> usb2.0 would be noticeable at all. > > That can and should be tested. Robert did already. Given that USB2.0 devices aren't usually used for high-perf storage subsystem, the benefit looks marginal to me but everyone is entitled to own opinion. Thanks. Thanks. -- tejun -- 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/