From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754348AbZEURiv (ORCPT ); Thu, 21 May 2009 13:38:51 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753518AbZEURio (ORCPT ); Thu, 21 May 2009 13:38:44 -0400 Received: from terminus.zytor.com ([198.137.202.10]:60581 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751407AbZEURin (ORCPT ); Thu, 21 May 2009 13:38:43 -0400 Message-ID: <4A159179.6070607@zytor.com> Date: Thu, 21 May 2009 10:38:01 -0700 From: "H. Peter Anvin" User-Agent: Thunderbird 2.0.0.14 (X11/20080501) MIME-Version: 1.0 To: Borislav Petkov CC: akpm@linux-foundation.org, greg@kroah.com, mingo@elte.hu, norsk5@yahoo.com, tglx@linutronix.de, mchehab@redhat.com, aris@redhat.com, edt@aei.ca, linux-kernel@vger.kernel.org, Andreas Herrmann Subject: Re: [PATCH 01/22] x86: add methods for writing of an MSR on several CPUs References: <1242390153-24493-1-git-send-email-borislav.petkov@amd.com> <1242390153-24493-2-git-send-email-borislav.petkov@amd.com> <20090519172449.GB18874@aftab> <4A1392A9.9010609@zytor.com> <20090520144905.GA27991@aftab> <4A147891.5000906@zytor.com> <20090521140800.GA3462@aftab> <4A156361.2040507@zytor.com> <20090521162638.GA10824@aftab> In-Reply-To: <20090521162638.GA10824@aftab> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Borislav Petkov wrote: > > Well, let's do the nonserializing thing and have it done right from the > beginning. We might not care now but who knows..? > If nothing else it might matter for boot time. Serializing *anything* across a large number of CPUs can be very expensive. -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.