From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [PATCH] KVM: SVM: Pass through the host kernel's IO delay port Date: Tue, 23 Jun 2009 08:59:05 +0200 Message-ID: <4A407D39.5080509@redhat.com> References: <1245406553-22013-1-git-send-email-pbonzini@redhat.com> <20090622173528.GA4673@amt.cnet> <4A3FC602.8090308@redhat.com> <20090622183041.GB8500@amt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Marcelo Tosatti Return-path: Received: from mx2.redhat.com ([66.187.237.31]:38530 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750986AbZFWG7M (ORCPT ); Tue, 23 Jun 2009 02:59:12 -0400 Received: from int-mx2.corp.redhat.com (int-mx2.corp.redhat.com [172.16.27.26]) by mx2.redhat.com (8.13.8/8.13.8) with ESMTP id n5N6xFxR013058 for ; Tue, 23 Jun 2009 02:59:15 -0400 In-Reply-To: <20090622183041.GB8500@amt.cnet> Sender: kvm-owner@vger.kernel.org List-ID: Marcelo Tosatti wrote: > On Mon, Jun 22, 2009 at 07:57:22PM +0200, Paolo Bonzini wrote: >> Marcelo Tosatti wrote: >>> Paolo, >>> >>> As said in private email you can change the port 80 passthrough to >>> disabled only on those hosts that have broken port 80 (you can find the >>> blacklist at arch/x86/kernel/io_delay.c).c >> Actually I read the code more and, since pv_ops is actually disabling >> outs to port 80 if the guest is sufficiently new, it may even make more >> sense for easier maintenance to remove the port 80 passthrough on Intel >> processors as well... > > But what about Windows guests? I don't think they are using port 80 to delay ISA access, are they? Paolo