From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [BUG] Spontaneous reboot loading dom0 for first time after cold boot Date: Tue, 12 Aug 2014 12:41:33 +0100 Message-ID: <53E9FD6D.8030604@citrix.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Peter Kay , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org On 12/08/14 12:12, Peter Kay wrote: > What's the procedure for diagnosing xen boot issues if it doesn't manage to load dom0? > > The first time xen loads following a cold boot the xen hypervisor boots but there is a spontaneous reboot immediately prior to dom0 loading. Subsequent reboots work fine. > > This used to be fine a few months back. Unstable code from at least a week back till a couple of nights ago exhibits the issue. > > Platform : SH3210SHLC 3210 chipset with a Q6700 running Debian Wheezy and kernel 3.16. Pretty certain I also exhibited the issue with 3.2.0.4 > > This issue does not occur with a non xen boot using the same kernel > > Any advice welcome > > PK Best would be to get serial set up, and use "com1=115200,8n1" on the Xen command line. Failing that, "console=vga noreboot" might show a stack trace on the screen. ~Andrew