From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1765883AbXGSVJu (ORCPT ); Thu, 19 Jul 2007 17:09:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757485AbXGSVJm (ORCPT ); Thu, 19 Jul 2007 17:09:42 -0400 Received: from gw.goop.org ([64.81.55.164]:56784 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760729AbXGSVJm (ORCPT ); Thu, 19 Jul 2007 17:09:42 -0400 Message-ID: <469FD2D7.1010808@goop.org> Date: Thu, 19 Jul 2007 14:08:39 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 2.0.0.4 (X11/20070615) MIME-Version: 1.0 To: Andi Kleen CC: patches@x86-64.org, Zachary Amsden , Mathieu Desnoyers , Rusty Russell , linux-kernel@vger.kernel.org, "S. P. Prasanna" , Chris Wright Subject: Re: [patches] new text patching for review References: <200707191105.44056.ak@suse.de> <200707192246.58047.ak@suse.de> <469FCEE7.8060900@goop.org> <200707192306.20625.ak@suse.de> In-Reply-To: <200707192306.20625.ak@suse.de> X-Enigmail-Version: 0.95.2 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Andi Kleen wrote: > Either not use any pvops or make sure all the pvops patching is atomic > on the local CPU. > Erk, not really keen on that. Sounds complicated, unless there's a nice general algorithm. > Ok you can avoid MCEs by not enabling them until after you patch (which I think > is the case currently), but it's more difficult with NMIs. > > The plain NMI handler is probably auditable. > Or set a flag that makes the NMI handler just return during patching? > I think that's probably the simplest, if nobody will miss it. J