From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753874Ab2CHHzV (ORCPT ); Thu, 8 Mar 2012 02:55:21 -0500 Received: from cn.fujitsu.com ([222.73.24.84]:15841 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752876Ab2CHHzU (ORCPT ); Thu, 8 Mar 2012 02:55:20 -0500 X-IronPort-AV: E=Sophos;i="4.73,551,1325433600"; d="scan'208";a="4488932" Message-ID: <4F58664D.1070800@cn.fujitsu.com> Date: Thu, 08 Mar 2012 15:57:01 +0800 From: Wen Congyang 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: kvm list , qemu-devel , "linux-kernel@vger.kernel.org" , Avi Kivity , "Daniel P. Berrange" , KAMEZAWA Hiroyuki , Jan Kiszka , Gleb Natapov Subject: [PATCH 0/2 v3] kvm: notify host when guest panicked X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-08 15:53:19, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-08 15:53:21, Serialize complete at 2012-03-08 15:53:21 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We can know the guest is paniced when the guest runs on xen. But we do not have such feature on kvm. Another purpose of this feature is: management app(for example: libvirt) can do auto dump when the guest is crashed. If management app does not do auto dump, the guest's user can do dump by hand if he sees the guest is paniced. I touch the hypervisor instead of using virtio-serial, because 1. it is simple 2. the virtio-serial is an optional device, and the guest may not have such device. Changes from v2 to v3: 1. correct spelling Changes from v1 to v2: 1. split up host and guest-side changes 2. introduce new request flag to avoid changing return values.