From mboxrd@z Thu Jan 1 00:00:00 1970 From: Phil Daws Subject: KVM Guest Lock up (100%) again! Date: Thu, 4 Apr 2013 15:36:11 +0100 (BST) Message-ID: <764654559.1031795.1365086171933.JavaMail.root@innovot.com> References: <2122448695.1031741.1365086071426.JavaMail.root@innovot.com> Reply-To: Phil Daws Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org Return-path: Received: from mx1.dc1.innovot.com ([77.73.4.109]:52801 "EHLO mx1.dc1.innovot.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1761594Ab3DDOhb (ORCPT ); Thu, 4 Apr 2013 10:37:31 -0400 Received: from sm1.dc3.innovot.com (sm1.dc3.innovot.com [192.168.1.208]) by mx1.dc3.innovot.com (Postfix) with ESMTP id 291DD4000E for ; Thu, 4 Apr 2013 15:36:20 +0100 (BST) Received: from localhost ([127.0.0.1]) by sm1.dc3.innovot.com with SMTP ID 494 for ; Thu, 4 Apr 2013 15:36:19 +0100 (BST) Received: from mx1.dc3.innovot.com (localhost [127.0.0.1]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.dc3.innovot.com (Postfix) with ESMTPS id E8BFF4000E for ; Thu, 4 Apr 2013 15:36:18 +0100 (BST) Received: from wm1.dc3.innovot.com (unknown [192.168.1.221]) by mx1.dc3.innovot.com (Postfix) with ESMTP id 1A9054000E for ; Thu, 4 Apr 2013 15:36:14 +0100 (BST) Received: from wm1.dc3.innovot.com (localhost.localdomain [127.0.0.1]) by wm1.dc3.innovot.com (Postfix) with ESMTP id 997FDCCB1C for ; Thu, 4 Apr 2013 15:36:13 +0100 (BST) Received: from wm1.dc3.innovot.com (wm1.dc3.innovot.com [192.168.1.221]) by wm1.dc3.innovot.com (Postfix) with ESMTP id 329FDCCB15 for ; Thu, 4 Apr 2013 15:36:13 +0100 (BST) In-Reply-To: <2122448695.1031741.1365086071426.JavaMail.root@innovot.com> Sender: kvm-owner@vger.kernel.org List-ID: One of my KVM guests locked up again at 100% CPU! Any thoughts on how I can diagnose it ? We would love to put into production but am very concerned about the current stability. I have tried to re-direct the console, through screen, to see whether there is a spin lock that is causing the problem; though all I got in the log file was a login prompt. What is the correct way of redirecting the console in KVM on a CentOS 6.4 system please ? Thanks.