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 1Vbk93-0006hS-Fh for kexec@lists.infradead.org; Thu, 31 Oct 2013 04:46:10 +0000 Received: from m3.gw.fujitsu.co.jp (unknown [10.0.50.73]) by fgwmail5.fujitsu.co.jp (Postfix) with ESMTP id B45A33EE1DD for ; Thu, 31 Oct 2013 13:45:42 +0900 (JST) Received: from smail (m3 [127.0.0.1]) by outgoing.m3.gw.fujitsu.co.jp (Postfix) with ESMTP id 671F045DEBA for ; Thu, 31 Oct 2013 13:45:42 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (s3.gw.fujitsu.co.jp [10.0.50.93]) by m3.gw.fujitsu.co.jp (Postfix) with ESMTP id 4DBB445DEB7 for ; Thu, 31 Oct 2013 13:45:42 +0900 (JST) Received: from s3.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id 353711DB8044 for ; Thu, 31 Oct 2013 13:45:42 +0900 (JST) Received: from ml14.s.css.fujitsu.com (ml14.s.css.fujitsu.com [10.240.81.134]) by s3.gw.fujitsu.co.jp (Postfix) with ESMTP id DC3981DB803F for ; Thu, 31 Oct 2013 13:45:41 +0900 (JST) Message-ID: <5271DFEC.7070802@jp.fujitsu.com> Date: Thu, 31 Oct 2013 13:43:24 +0900 From: HATAYAMA Daisuke MIME-Version: 1.0 Subject: Re: [PATCH v4 0/3] x86, apic, kexec: Add disable_cpu_apic kernel parameter References: <20131022150015.24240.39686.stgit@localhost6.localdomain6> <20131022220803.GA32387@anatevka.fc.hp.com> <526712B2.7070108@jp.fujitsu.com> <20131031005812.GA15459@anatevka.fc.hp.com> In-Reply-To: <20131031005812.GA15459@anatevka.fc.hp.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" Errors-To: kexec-bounces+dwmw2=twosheds.infradead.org@lists.infradead.org To: jerry.hoemann@hp.com Cc: fengguang.wu@intel.com, jingbai.ma@hp.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, bp@alien8.de, ebiederm@xmission.com, akpm@linux-foundation.org, hpa@linux.intel.com, vgoyal@redhat.com (2013/10/31 9:58), jerry.hoemann@hp.com wrote: > On Wed, Oct 23, 2013 at 09:05:06AM +0900, HATAYAMA Daisuke wrote: >>>> >>>> - Rebased on top of v3.12-rc6 >>>> >>>> - Basic design has been changed. Now users need to figure out initial >>>> APIC ID of BSP in the 1st kernel and configures kernel parameter for >>>> the 2nd kernel manually using disable_cpu_apic kernel parameter to >>>> be newly introduced in this patch set. This design is more flexible >>>> than the previous version in that we no longer have to rely on >>>> ACPI/MP table to get initial APIC ID of BSP. >>> >>> >>> Do you literally mean a human at each boot will have to configure >>> the kdump configuration files for passing disable_cpu_apic? >>> Or do you envision the setting of disable_cpu_apic being put into >>> the kdump initialization scripts? >>> >>> thanks >>> >>> Jerry >> >> Nearer to the former case, but this is not what a human should do. It's >> a cumbersome task. I think, on fedora/RHEL system for example, kdump >> service should check at each boot automatically. >> >> HATAYAMA, Daisuke > > > Daisuke, > > Are you planning on making changes to the kexec tools to automate > the setting of disable_cpu_apic to the capture kernel? Or do you > know someone who is planning this? > > I back ported the kernel side changes to a 4.2.32 based kernel. > I tested the patch on a prototype system which exhibits a stable > initial_apic_id for CPU 0. While not something that would be suitable > for customers, it does allow me to test the kernel portion of the patch. > > I will report the results of the testing later this week. > I'll do that after this patch is merged in kernel. But it is still under reviewing. -- Thanks. HATAYAMA, Daisuke _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec