From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from fgwmail5.fujitsu.co.jp ([192.51.44.35]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VBLYD-0008Gr-I1 for kexec@lists.infradead.org; Mon, 19 Aug 2013 09:15:02 +0000 Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id 6CC6C3EE1DA for ; Mon, 19 Aug 2013 18:14:33 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 5CFE245DE53 for ; Mon, 19 Aug 2013 18:14:33 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 40A3E45DE4E for ; Mon, 19 Aug 2013 18:14:33 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 2D0CC1DB803F for ; Mon, 19 Aug 2013 18:14:33 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.240.81.134]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id D7D251DB8037 for ; Mon, 19 Aug 2013 18:14:32 +0900 (JST) Message-ID: <5211E1C3.7090009@jp.fujitsu.com> Date: Mon, 19 Aug 2013 18:13:39 +0900 From: HATAYAMA Daisuke MIME-Version: 1.0 Subject: Re: [Help Test] kdump, x86, acpi: Reproduce CPU0 SMI corruption issue after unsetting BSP flag References: <5200BFB3.2050202@jp.fujitsu.com> <520A10A3.5080303@hp.com> <520B4A22.2030800@hp.com> <87ob90839p.fsf@xmission.com> <5211831B.6090704@jp.fujitsu.com> In-Reply-To: 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" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: "Eric W. Biederman" Cc: Fenghua Yu , "kexec@lists.infradead.org" , Linux Kernel Mailing List , "Mitchell, Lisa (MCLinux in Fort Collins)" , Vivek Goyal , "H. Peter Anvin" , bhelgaas@google.com, Jingbai Ma (2013/08/19 11:59), Eric W. Biederman wrote: > > > >> >> Sorry Eric, I'm not clear to what you mean by ``short one core''... >> Which are you suggesting? Disabling BSP if crash happens on AP is >> reasonable? >> Or restricting cpus to a single one only just as the current kdump >> configuration is reasonable? > > I am suggesting we start every cpu except the BSP from the AP we started on. > > N-1 cpus seems like a good tradeoff between performance and reliability for those who need it. > > Eric > Thanks. I'm now clear. Well, I'll post a version 2 patch after upgrading it for current upstream kernel. But it would be next week or later. -- Thanks. HATAYAMA, Daisuke _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751175Ab3HSJOg (ORCPT ); Mon, 19 Aug 2013 05:14:36 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:56941 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750958Ab3HSJOe (ORCPT ); Mon, 19 Aug 2013 05:14:34 -0400 X-SecurityPolicyCheck: OK by SHieldMailChecker v1.8.9 X-SHieldMailCheckerPolicyVersion: FJ-ISEC-20120718-2 Message-ID: <5211E1C3.7090009@jp.fujitsu.com> Date: Mon, 19 Aug 2013 18:13:39 +0900 From: HATAYAMA Daisuke User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130801 Thunderbird/17.0.8 MIME-Version: 1.0 To: "Eric W. Biederman" CC: Jingbai Ma , Fenghua Yu , "kexec@lists.infradead.org" , Linux Kernel Mailing List , "Mitchell, Lisa (MCLinux in Fort Collins)" , "H. Peter Anvin" , bhelgaas@google.com, Vivek Goyal Subject: Re: [Help Test] kdump, x86, acpi: Reproduce CPU0 SMI corruption issue after unsetting BSP flag References: <5200BFB3.2050202@jp.fujitsu.com> <520A10A3.5080303@hp.com> <520B4A22.2030800@hp.com> <87ob90839p.fsf@xmission.com> <5211831B.6090704@jp.fujitsu.com> In-Reply-To: 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 (2013/08/19 11:59), Eric W. Biederman wrote: > > > >> >> Sorry Eric, I'm not clear to what you mean by ``short one core''... >> Which are you suggesting? Disabling BSP if crash happens on AP is >> reasonable? >> Or restricting cpus to a single one only just as the current kdump >> configuration is reasonable? > > I am suggesting we start every cpu except the BSP from the AP we started on. > > N-1 cpus seems like a good tradeoff between performance and reliability for those who need it. > > Eric > Thanks. I'm now clear. Well, I'll post a version 2 patch after upgrading it for current upstream kernel. But it would be next week or later. -- Thanks. HATAYAMA, Daisuke