From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gleb Natapov Subject: Re: 3.9 / 3.10: Reliable host crashes Date: Wed, 10 Jul 2013 19:16:38 +0300 Message-ID: <20130710161638.GB24941@redhat.com> References: <20130710160218.GA24941@redhat.com> <51DD8683.9010007@itwm.fraunhofer.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: kvm@vger.kernel.org To: Bernd Schubert Return-path: Received: from mx1.redhat.com ([209.132.183.28]:63092 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753948Ab3GJQQp (ORCPT ); Wed, 10 Jul 2013 12:16:45 -0400 Content-Disposition: inline In-Reply-To: <51DD8683.9010007@itwm.fraunhofer.de> Sender: kvm-owner@vger.kernel.org List-ID: On Wed, Jul 10, 2013 at 06:06:27PM +0200, Bernd Schubert wrote: > On 07/10/2013 06:02 PM, Gleb Natapov wrote: > >On Wed, Jul 10, 2013 at 04:16:46PM +0200, Bernd Schubert wrote: > >>Hi all, > >> > >>I found a way to reliably crash my host system: > >> > >>1) Boot guest VM with init=/bin/bash > >> > >>2) In guest VM: echo b >/proc/sysrq-trigger > >> > >>3) Try to reboot the guest -> crashes the host during kernel initialization > >> > >What 3 means? 2 already reboots it. > > Sorry, not a good wording. The guest reboots, goes through grub, > starts the kernel and the host then crashes during early > initialization of the guest kernel. And if you boot it without init= first and just reboot it with "reboot" does the same happens? Can your attach your .config here? Also can you compile KSM out and retry? -- Gleb.