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 Content-Length: 922 Lines: 32 (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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/