From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:57617) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QYw1b-0003IB-3a for qemu-devel@nongnu.org; Tue, 21 Jun 2011 04:09:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1QYw1Z-0007VT-DL for qemu-devel@nongnu.org; Tue, 21 Jun 2011 04:09:31 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36125) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1QYw1Y-0007VP-VF for qemu-devel@nongnu.org; Tue, 21 Jun 2011 04:09:29 -0400 Message-ID: <4E0051B1.8060801@redhat.com> Date: Tue, 21 Jun 2011 11:09:21 +0300 From: Avi Kivity MIME-Version: 1.0 References: <1308577094-17551-1-git-send-email-gollub@b1-systems.de> <20110620153825.GH13042@redhat.com> <4DFF6B20.7090107@redhat.com> <201106201826.32975.gollub@b1-systems.de> <4DFF76B1.8020509@redhat.com> <20110621060251.GB491@redhat.com> In-Reply-To: <20110621060251.GB491@redhat.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/2] Introduce panic hypercall List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gleb Natapov Cc: Daniel Gollub , qemu-devel , kvm@vger.kernel.org On 06/21/2011 09:02 AM, Gleb Natapov wrote: > On Mon, Jun 20, 2011 at 07:34:57PM +0300, Avi Kivity wrote: > > >The only two things which came to my mind are: > > > > > > * NMI (aka. ipmitool diag) - already available in qemu/kvm - but requires > > > in-guest kexec/kdump > > > * Hardware-Watchdog (also available in qemu/libvirt) > > > > A watchdog has the advantage that is also detects lockups. > > > And has disadvantage that all time base heuristics are bite us in the > end. The perf-based watchdog counts clocks-not-halted, not time, so it is safe from time issues. We could make the hardware watchdog cheat in the same way. -- error compiling committee.c: too many arguments to function