From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756350Ab2JWAga (ORCPT ); Mon, 22 Oct 2012 20:36:30 -0400 Received: from terminus.zytor.com ([198.137.202.10]:38043 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752848Ab2JWAg3 (ORCPT ); Mon, 22 Oct 2012 20:36:29 -0400 Message-ID: <5085E663.6040307@zytor.com> Date: Mon, 22 Oct 2012 17:35:47 -0700 From: "H. Peter Anvin" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:16.0) Gecko/20121016 Thunderbird/16.0.1 MIME-Version: 1.0 To: "Eric W. Biederman" CC: HATAYAMA Daisuke , linux-kernel@vger.kernel.org, kexec@lists.infradead.org, x86@kernel.org, mingo@elte.hu, tglx@linutronix.de, len.brown@intel.com, fenghua.yu@intel.com, vgoyal@redhat.com, grant.likely@secretlab.ca, rob.herring@calxeda.com Subject: Re: [PATCH v1 2/2] x86, apic: Disable BSP if boot cpu is AP References: <20121016043357.20003.5885.stgit@localhost6.localdomain6> <20121016043528.20003.601.stgit@localhost6.localdomain6> <873916i88t.fsf@xmission.com> <5085A9A8.5020004@zytor.com> <87fw56fduo.fsf@xmission.com> <5085AD7D.106@zytor.com> <87a9vedyqe.fsf@xmission.com> <5085B0D0.9020508@zytor.com> <87mwze8abu.fsf@xmission.com> In-Reply-To: <87mwze8abu.fsf@xmission.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 10/22/2012 02:29 PM, Eric W. Biederman wrote: >> >> As I said, I thought Fenghua tried that but it didn't work, experimentally. > > Fair enough. You described the problem with clearing bit 8 in a weird > way. > > If the best we can muster are fuzzy memories it may be worth revisiting. > Perhaps it works on enough cpu models to be interesting. > It isn't fuzzy memories... this was done as late as 1-2 months ago. I just don't know the details. Fenghua, could you help fill us in? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from terminus.zytor.com ([2001:1868:205::10] helo=mail.zytor.com) by casper.infradead.org with esmtps (Exim 4.76 #1 (Red Hat Linux)) id 1TQSTo-0006mh-C2 for kexec@lists.infradead.org; Tue, 23 Oct 2012 00:36:25 +0000 Message-ID: <5085E663.6040307@zytor.com> Date: Mon, 22 Oct 2012 17:35:47 -0700 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [PATCH v1 2/2] x86, apic: Disable BSP if boot cpu is AP References: <20121016043357.20003.5885.stgit@localhost6.localdomain6> <20121016043528.20003.601.stgit@localhost6.localdomain6> <873916i88t.fsf@xmission.com> <5085A9A8.5020004@zytor.com> <87fw56fduo.fsf@xmission.com> <5085AD7D.106@zytor.com> <87a9vedyqe.fsf@xmission.com> <5085B0D0.9020508@zytor.com> <87mwze8abu.fsf@xmission.com> In-Reply-To: <87mwze8abu.fsf@xmission.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: "Eric W. Biederman" Cc: len.brown@intel.com, fenghua.yu@intel.com, x86@kernel.org, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, rob.herring@calxeda.com, grant.likely@secretlab.ca, HATAYAMA Daisuke , tglx@linutronix.de, mingo@elte.hu, vgoyal@redhat.com On 10/22/2012 02:29 PM, Eric W. Biederman wrote: >> >> As I said, I thought Fenghua tried that but it didn't work, experimentally. > > Fair enough. You described the problem with clearing bit 8 in a weird > way. > > If the best we can muster are fuzzy memories it may be worth revisiting. > Perhaps it works on enough cpu models to be interesting. > It isn't fuzzy memories... this was done as late as 1-2 months ago. I just don't know the details. Fenghua, could you help fill us in? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf. _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec