From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: VT-d support for device assignment Date: Sun, 24 Aug 2008 13:02:09 +0300 Message-ID: <48B131A1.1000900@qumranet.com> References: <1219389054-15332-1-git-send-email-amit.shah@qumranet.com> <48AF039B.7040805@qumranet.com> <200808231442.09332.amit.shah@qumranet.com> <48AFD97A.30309@qumranet.com> <20080823095025.GA6942@il.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Amit Shah , kvm@vger.kernel.org, anthony@codemonkey.ws, jesse.barnes@intel.com, david.woodhouse@intel.com, mark.gross@intel.com, Ben-Ami Yassour1 , weidong.han@intel.com To: Muli Ben-Yehuda Return-path: Received: from il.qumranet.com ([212.179.150.194]:29075 "EHLO il.qumranet.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752634AbYHXKCK (ORCPT ); Sun, 24 Aug 2008 06:02:10 -0400 In-Reply-To: <20080823095025.GA6942@il.ibm.com> Sender: kvm-owner@vger.kernel.org List-ID: Muli Ben-Yehuda wrote: > On Sat, Aug 23, 2008 at 12:33:46PM +0300, Avi Kivity wrote: > > >> So long as there is no potential for performance or security impact, >> having pvdma turned on automatically is better. We could still have >> dma=noparavirt to disable it. >> > > pvdma has advantages and disadvantages. It has a significant > performance impact (compared to direct map) That needs to be fixed. -- error compiling committee.c: too many arguments to function