From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from [222.73.24.84] (helo=song.cn.fujitsu.com) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1SKRWj-0005I7-QR for kexec@lists.infradead.org; Wed, 18 Apr 2012 09:50:18 +0000 Message-ID: <4F8E8E3D.8040707@cn.fujitsu.com> Date: Wed, 18 Apr 2012 17:49:49 +0800 From: zhangyanfei MIME-Version: 1.0 Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump References: <4F84E0DF.8040206@cn.fujitsu.com> <4F8D1F46.3090901@redhat.com> <4F8D4B4C.8070705@cn.fujitsu.com> <4F8D4D1C.4010400@redhat.com> <4F8E6DA5.8030503@cn.fujitsu.com> <4F8E7A5B.5030904@redhat.com> In-Reply-To: <4F8E7A5B.5030904@redhat.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: kexec-bounces@lists.infradead.org Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: Avi Kivity Cc: 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, ludwig.nussel@suse.de, ebiederm@xmission.com 5LqOIDIwMTLlubQwNOaciDE45pelIDE2OjI0LCBBdmkgS2l2aXR5IOWGmemBkzoKPiBPbiAwNC8x OC8yMDEyIDEwOjMwIEFNLCB6aGFuZ3lhbmZlaSB3cm90ZToKPj4+Cj4+PiBPa2F5LiAgRG8geW91 IGV4cGVjdCBpdCB0byBoZWxwIGluIGRlYnVnZ2luZyB0aGUgY3Jhc2g/ICBEaWQgeW91IGhhdmUK Pj4+IGNhc2VzIHdoZXJlIGl0IHdvdWxkIGhlbHA/Cj4+Pgo+Pgo+PiBZZXMsIEkgZG8gZXhwZWN0 IGl0IHRvIGhlbHAgaW4gZGVidWdnaW5nIHRoZSBjcmFzaC4KPj4gTG9va2luZyBpbnRvIGhvc3Qg bWFjaGluZSdzIGNyYXNoIGR1bXAsIGlmIHdlIGZpZ3VyZSBvdXQgdGhlIGZhY3QgdGhhdCB0aGUg Y3Jhc2gKPj4gaGFkIGhhcHBlbmQgd2hlbiBzb21lIGhvc3QncyByZXNvdXJjZSB3YXMgcmVxdWVz dGVkIGFuZCB1c2VkIGJ5IHNvbWUgZ3VzZXQgbWFjaGluZS4KPj4gVGhlbiwgd2Ugc3VyZWx5IHdh bnQgdG8gbG9vayBpbnRvIHRoZSBzaXR1YXRpb24gZnJvbSBndWVzdCBtYWNoaW5lJ3Mgdmlldy4K Pj4KPj4KPiAKPiBXaGF0IHR5cGUgb2YgcmVzb3VyY2U/ICBDYW4geW91IGdpdmUgYW4gZXhhbXBs ZT8KPiAKU29ycnkuIE5vIGNvbmNyZXRlIGV4YW1wbGUgZm9yIG5vdy4KCldlIGFyZSBkZXZlbG9w aW5nIHRoaXMgb24gYSBjb25zZXJ2YXRpdmUgcG9saWN5IGFuZCBJIGhhdmUgcHV0IHRoZSB2bWNz IHByb2Nlc3NpbmcKaW4gYSBuZXcgbW9kdWxlIGluIHBhdGNoIHNldCB2MiBhcyB5b3UgcmVxdWly ZWQuIFRoZSBuZXcgbW9kdWxlIGlzIGF1dG8tbG9hZGVkIHdoZW4KdGhlIHZteCBjcHVmZWF0dXJl IGlzIGRldGVjdGVkIGFuZCBpdCBkZXBlbmRzIG9uIG1vZHVsZSBrdm0taW50ZWwuIExvYWRpbmcg YW5kIHVubG9hZGluZwp0aGlzIG1vZHVsZSB3aWxsIGhhdmUgbm8gc2lkZSBlZmZlY3Qgb24gdGhl IHJ1bm5pbmcgZ3Vlc3RzLgoKQW5kIG9uZSB0aGluZyBJIGhhdmUgdG8gc3RyZXNzIGlzIHRoYXQs IHdlIGNhbiBzZWUgZ3Vlc3QgaW1hZ2UgYXMgY3Jhc2ggZHVtcCBmcm9tCmd1ZXN0IG1hY2hpbmUn cyB2aWV3IGlmIHdlIGhhdmUgdGhlIHZtY3NpbmZvLCB0aGlzIGl0c2VsZiBpcyB1c2VmdWwuCgpU aGFua3MKWmhhbmcgWWFuZmVpCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3RzLmluZnJhZGVhZC5vcmcK aHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9rZXhlYwo= From mboxrd@z Thu Jan 1 00:00:00 1970 From: zhangyanfei Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump Date: Wed, 18 Apr 2012 17:49:49 +0800 Message-ID: <4F8E8E3D.8040707@cn.fujitsu.com> References: <4F84E0DF.8040206@cn.fujitsu.com> <4F8D1F46.3090901@redhat.com> <4F8D4B4C.8070705@cn.fujitsu.com> <4F8D4D1C.4010400@redhat.com> <4F8E6DA5.8030503@cn.fujitsu.com> <4F8E7A5B.5030904@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: dzickus-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, luto-3s7WtUTddSA@public.gmane.org, gregkh-l3A5Bk7waGM@public.gmane.org, kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, joerg.roedel-5C7GfCeVMHo@public.gmane.org, mtosatti-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, paul.gortmaker-CWA4WttNNZF54TAoqtyWWQ@public.gmane.org, ludwig.nussel-l3A5Bk7waGM@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org To: Avi Kivity Return-path: In-Reply-To: <4F8E7A5B.5030904-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 5LqOIDIwMTLlubQwNOaciDE45pelIDE2OjI0LCBBdmkgS2l2aXR5IOWGmemBkzoKPiBPbiAwNC8x OC8yMDEyIDEwOjMwIEFNLCB6aGFuZ3lhbmZlaSB3cm90ZToKPj4+Cj4+PiBPa2F5LiAgRG8geW91 IGV4cGVjdCBpdCB0byBoZWxwIGluIGRlYnVnZ2luZyB0aGUgY3Jhc2g/ICBEaWQgeW91IGhhdmUK Pj4+IGNhc2VzIHdoZXJlIGl0IHdvdWxkIGhlbHA/Cj4+Pgo+Pgo+PiBZZXMsIEkgZG8gZXhwZWN0 IGl0IHRvIGhlbHAgaW4gZGVidWdnaW5nIHRoZSBjcmFzaC4KPj4gTG9va2luZyBpbnRvIGhvc3Qg bWFjaGluZSdzIGNyYXNoIGR1bXAsIGlmIHdlIGZpZ3VyZSBvdXQgdGhlIGZhY3QgdGhhdCB0aGUg Y3Jhc2gKPj4gaGFkIGhhcHBlbmQgd2hlbiBzb21lIGhvc3QncyByZXNvdXJjZSB3YXMgcmVxdWVz dGVkIGFuZCB1c2VkIGJ5IHNvbWUgZ3VzZXQgbWFjaGluZS4KPj4gVGhlbiwgd2Ugc3VyZWx5IHdh bnQgdG8gbG9vayBpbnRvIHRoZSBzaXR1YXRpb24gZnJvbSBndWVzdCBtYWNoaW5lJ3Mgdmlldy4K Pj4KPj4KPiAKPiBXaGF0IHR5cGUgb2YgcmVzb3VyY2U/ICBDYW4geW91IGdpdmUgYW4gZXhhbXBs ZT8KPiAKU29ycnkuIE5vIGNvbmNyZXRlIGV4YW1wbGUgZm9yIG5vdy4KCldlIGFyZSBkZXZlbG9w aW5nIHRoaXMgb24gYSBjb25zZXJ2YXRpdmUgcG9saWN5IGFuZCBJIGhhdmUgcHV0IHRoZSB2bWNz IHByb2Nlc3NpbmcKaW4gYSBuZXcgbW9kdWxlIGluIHBhdGNoIHNldCB2MiBhcyB5b3UgcmVxdWly ZWQuIFRoZSBuZXcgbW9kdWxlIGlzIGF1dG8tbG9hZGVkIHdoZW4KdGhlIHZteCBjcHVmZWF0dXJl IGlzIGRldGVjdGVkIGFuZCBpdCBkZXBlbmRzIG9uIG1vZHVsZSBrdm0taW50ZWwuIExvYWRpbmcg YW5kIHVubG9hZGluZwp0aGlzIG1vZHVsZSB3aWxsIGhhdmUgbm8gc2lkZSBlZmZlY3Qgb24gdGhl IHJ1bm5pbmcgZ3Vlc3RzLgoKQW5kIG9uZSB0aGluZyBJIGhhdmUgdG8gc3RyZXNzIGlzIHRoYXQs IHdlIGNhbiBzZWUgZ3Vlc3QgaW1hZ2UgYXMgY3Jhc2ggZHVtcCBmcm9tCmd1ZXN0IG1hY2hpbmUn cyB2aWV3IGlmIHdlIGhhdmUgdGhlIHZtY3NpbmZvLCB0aGlzIGl0c2VsZiBpcyB1c2VmdWwuCgpU aGFua3MKWmhhbmcgWWFuZmVpCgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX18Ka2V4ZWMgbWFpbGluZyBsaXN0CmtleGVjQGxpc3RzLmluZnJhZGVhZC5vcmcK aHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0aW5mby9rZXhlYwo= From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752788Ab2DRJuW (ORCPT ); Wed, 18 Apr 2012 05:50:22 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:35769 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752506Ab2DRJuQ convert rfc822-to-8bit (ORCPT ); Wed, 18 Apr 2012 05:50:16 -0400 X-IronPort-AV: E=Sophos;i="4.75,441,1330876800"; d="scan'208";a="4782477" Message-ID: <4F8E8E3D.8040707@cn.fujitsu.com> Date: Wed, 18 Apr 2012 17:49:49 +0800 From: zhangyanfei User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: Avi Kivity CC: mtosatti@redhat.com, ebiederm@xmission.com, luto@mit.edu, joerg.roedel@amd.com, dzickus@redhat.com, paul.gortmaker@windriver.com, gregkh@suse.de, ludwig.nussel@suse.de, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, kexec@lists.infradead.org Subject: Re: [PATCH 0/4] Export offsets of VMCS fields as note information for kdump References: <4F84E0DF.8040206@cn.fujitsu.com> <4F8D1F46.3090901@redhat.com> <4F8D4B4C.8070705@cn.fujitsu.com> <4F8D4D1C.4010400@redhat.com> <4F8E6DA5.8030503@cn.fujitsu.com> <4F8E7A5B.5030904@redhat.com> In-Reply-To: <4F8E7A5B.5030904@redhat.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/04/18 17:49:14, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/04/18 17:49:20 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 于 2012年04月18日 16:24, Avi Kivity 写道: > On 04/18/2012 10:30 AM, zhangyanfei wrote: >>> >>> Okay. Do you expect it to help in debugging the crash? Did you have >>> cases where it would help? >>> >> >> Yes, I do expect it to help in debugging the crash. >> Looking into host machine's crash dump, if we figure out the fact that the crash >> had happend when some host's resource was requested and used by some guset machine. >> Then, we surely want to look into the situation from guest machine's view. >> >> > > What type of resource? Can you give an example? > Sorry. No concrete example for now. We are developing this on a conservative policy and I have put the vmcs processing in a new module in patch set v2 as you required. The new module is auto-loaded when the vmx cpufeature is detected and it depends on module kvm-intel. Loading and unloading this module will have no side effect on the running guests. And one thing I have to stress is that, we can see guest image as crash dump from guest machine's view if we have the vmcsinfo, this itself is useful. Thanks Zhang Yanfei