From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx1.redhat.com ([209.132.183.28]) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SLuU6-0005Zw-Ep for kexec@lists.infradead.org; Sun, 22 Apr 2012 10:57:39 +0000 Message-ID: <4F93E411.7070809@redhat.com> Date: Sun, 22 Apr 2012 13:57:21 +0300 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump References: <4F8FF7AC.1060309@redhat.com> <20120419.210119.246504497.d.hatayama@jp.fujitsu.com> <4F900020.5010702@redhat.com> <20120420.191133.488341439.d.hatayama@jp.fujitsu.com> <4F93D64B.50803@redhat.com> <20120422103340.GE12768@redhat.com> In-Reply-To: <20120422103340.GE12768@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Gleb Natapov Cc: dzickus@redhat.com, luto@mit.edu, mtosatti@redhat.com, kvm@vger.kernel.org, joerg.roedel@amd.com, gregkh@suse.de, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, paul.gortmaker@windriver.com, HATAYAMA Daisuke , zhangyanfei@cn.fujitsu.com, ebiederm@xmission.com, ludwig.nussel@suse.de On 04/22/2012 01:33 PM, Gleb Natapov wrote: > > > > What I don't understand is why you are interested in the guest machine > > at all, if it was qemu that crashed. > > > It would be interesting to extract enough information from the core to be > able to restart the guest from the point where qemu crashed, but > decoding VMCS is not enough for that. Interesting idea. It should be possible if you attach all kvm state to the core (and do quite a lot of digging to recover device model state). -- error compiling committee.c: too many arguments to function _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump Date: Sun, 22 Apr 2012 13:57:21 +0300 Message-ID: <4F93E411.7070809@redhat.com> References: <4F8FF7AC.1060309@redhat.com> <20120419.210119.246504497.d.hatayama@jp.fujitsu.com> <4F900020.5010702@redhat.com> <20120420.191133.488341439.d.hatayama@jp.fujitsu.com> <4F93D64B.50803@redhat.com> <20120422103340.GE12768@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: dzickus-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, luto-3s7WtUTddSA@public.gmane.org, mtosatti-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, joerg.roedel-5C7GfCeVMHo@public.gmane.org, gregkh-l3A5Bk7waGM@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org, HATAYAMA Daisuke , zhangyanfei-BthXqXjhjHXQFUHtdCDX3A@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, ludwig.nussel-l3A5Bk7waGM@public.gmane.org To: Gleb Natapov Return-path: In-Reply-To: <20120422103340.GE12768-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kexec-bounces-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org Errors-To: kexec-bounces+glkk-kexec=m.gmane.org-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: kvm.vger.kernel.org On 04/22/2012 01:33 PM, Gleb Natapov wrote: > > > > What I don't understand is why you are interested in the guest machine > > at all, if it was qemu that crashed. > > > It would be interesting to extract enough information from the core to be > able to restart the guest from the point where qemu crashed, but > decoding VMCS is not enough for that. Interesting idea. It should be possible if you attach all kvm state to the core (and do quite a lot of digging to recover device model state). -- error compiling committee.c: too many arguments to function From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751657Ab2DVK5o (ORCPT ); Sun, 22 Apr 2012 06:57:44 -0400 Received: from mx1.redhat.com ([209.132.183.28]:63790 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751017Ab2DVK5n (ORCPT ); Sun, 22 Apr 2012 06:57:43 -0400 Message-ID: <4F93E411.7070809@redhat.com> Date: Sun, 22 Apr 2012 13:57:21 +0300 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:11.0) Gecko/20120329 Thunderbird/11.0.1 MIME-Version: 1.0 To: Gleb Natapov CC: HATAYAMA Daisuke , dzickus@redhat.com, luto@mit.edu, gregkh@suse.de, kvm@vger.kernel.org, joerg.roedel@amd.com, mtosatti@redhat.com, kexec@lists.infradead.org, linux-kernel@vger.kernel.org, paul.gortmaker@windriver.com, zhangyanfei@cn.fujitsu.com, ebiederm@xmission.com, ludwig.nussel@suse.de Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump References: <4F8FF7AC.1060309@redhat.com> <20120419.210119.246504497.d.hatayama@jp.fujitsu.com> <4F900020.5010702@redhat.com> <20120420.191133.488341439.d.hatayama@jp.fujitsu.com> <4F93D64B.50803@redhat.com> <20120422103340.GE12768@redhat.com> In-Reply-To: <20120422103340.GE12768@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/22/2012 01:33 PM, Gleb Natapov wrote: > > > > What I don't understand is why you are interested in the guest machine > > at all, if it was qemu that crashed. > > > It would be interesting to extract enough information from the core to be > able to restart the guest from the point where qemu crashed, but > decoding VMCS is not enough for that. Interesting idea. It should be possible if you attach all kvm state to the core (and do quite a lot of digging to recover device model state). -- error compiling committee.c: too many arguments to function