From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760712Ab2CNKI2 (ORCPT ); Wed, 14 Mar 2012 06:08:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:33996 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760675Ab2CNKIT (ORCPT ); Wed, 14 Mar 2012 06:08:19 -0400 Message-ID: <4F606E06.8070302@redhat.com> Date: Wed, 14 Mar 2012 12:08:06 +0200 From: Avi Kivity User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 MIME-Version: 1.0 To: Wen Congyang CC: Amit Shah , "Daniel P. Berrange" , kvm list , qemu-devel , "linux-kernel@vger.kernel.org" , KAMEZAWA Hiroyuki , Jan Kiszka , Gleb Natapov Subject: Re: [PATCH 0/2 v3] kvm: notify host when guest panicked References: <4F58664D.1070800@cn.fujitsu.com> <4F58943E.1050402@redhat.com> <4F595B31.9090301@cn.fujitsu.com> <4F5DBC26.7060204@cn.fujitsu.com> <4F5DD0FD.9070904@redhat.com> <20120313091843.GB3800@redhat.com> <4F5F25BF.7060100@redhat.com> <4F6056FE.3020202@cn.fujitsu.com> <20120314095114.GA4136@amit.redhat.com> <4F606D38.2070107@cn.fujitsu.com> In-Reply-To: <4F606D38.2070107@cn.fujitsu.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 03/14/2012 12:04 PM, Wen Congyang wrote: > > > > This is sufficient. On the host, you can open /tmp/foo using a custom > > program or nc (nc -U /tmp/foo). On the guest, you can just open > > /dev/virtio-ports/port1 and read/write into it. > > I have two questions: > 1. does it OK to open this device when the guest is panicked? > On panic, I think it's best to reset the device and drive it directly from the panic handler. -- error compiling committee.c: too many arguments to function