Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756021Ab0GATmL (ORCPT ); Thu, 1 Jul 2010 15:42:11 -0400 Received: from wolverine02.qualcomm.com ([199.106.114.251]:43108 "EHLO wolverine02.qualcomm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754497Ab0GATmJ (ORCPT ); Thu, 1 Jul 2010 15:42:09 -0400 X-IronPort-AV: E=McAfee;i="5400,1158,6030"; a="46057051" Subject: Re: [RFC 3/3] mm: iommu: The Virtual Contiguous Memory Manager From: Daniel Walker To: Andi Kleen Cc: Randy Dunlap , Zach Pfeffer , mel@csn.ul.ie, linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org In-Reply-To: <20100701193850.GB3594@basil.fritz.box> References: <1277877350-2147-1-git-send-email-zpfeffer@codeaurora.org> <1277877350-2147-3-git-send-email-zpfeffer@codeaurora.org> <20100701101746.3810cc3b.randy.dunlap@oracle.com> <20100701180241.GA3594@basil.fritz.box> <1278012503.7738.17.camel@c-dwalke-linux.qualcomm.com> <20100701193850.GB3594@basil.fritz.box> Content-Type: text/plain; charset="UTF-8" Date: Thu, 01 Jul 2010 12:42:00 -0700 Message-ID: <1278013320.7738.19.camel@c-dwalke-linux.qualcomm.com> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1147 Lines: 27 On Thu, 2010-07-01 at 21:38 +0200, Andi Kleen wrote: > > > > > Also for me it's still quite unclear why we would want this code at all... > > > It doesn't seem to do anything you couldn't do with the existing interfaces. > > > > I don't know all that much about what Zach's done here, but from what > > he's said so far it looks like this help to manage lots of IOMMUs on a > > single system.. On x86 it seems like there's not all that many IOMMUs in > > comparison .. Zach mentioned 10 to 100 IOMMUs .. > > The current code can manage multiple IOMMUs fine. He demonstrated the usage of his code in one of the emails he sent out initially. Did you go over that, and what (or how many) step would you use with the current code to do the same thing? Daniel -- Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum. -- 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/