Re: [Xen-devel] Immediate reboot on Xen kernel 4.9.13 ->4.9.20 load, but non-Xen is OK

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 07.04.17 at 13:47, <pjwelsh@xxxxxxxxx> wrote:
> On Fri, Apr 7, 2017 at 4:11 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote:
> 
>> >>> On 06.04.17 at 19:12, <pjwelsh@xxxxxxxxx> wrote:
>> > I started off my attempt to figure out what's going on with the
>> centos-virt
>> > group as that is the Xen entry point I use for server. It was recommended
>> > to me to put my issue here. This is the beginging of the thread:
>> > https://lists.centos.org/pipermail/centos-virt/2017-March/005411.html 
>> > George suggested I seek help from xen-devel:
>> > https://lists.centos.org/pipermail/centos-virt/2017-March/005442.html 
>> >
>> > Summary:
>> > Within about 2 seconds of starting the servers with the Xen enabled
>> kernel,
>> > the server will reboot:
>> > The last few lines are
>> > NMI watchdog: disabled CPU0 hardware events not enabled
>> > NMI watchdog: shutting down hard lockup detector on all CPUS
>> > installing Xen timer for CPU1
>> > installing Xen timer for CPU2
>> > installing Xen timer for CPU3
>> > installing Xen timer for CPU4
>> > installing Xen timer for CPU5
>> > installing Xen timer for CPU6
>> >
>> > Here is the screen shot:
>> > https://goo.gl/photos/yNQqaQY9bJBWQ84X8 
>> > It stops at CPU6. This is a dual socket server with 2x 6core L5639 CPUs
>> (HT
>> > disabled). I'm surprised to see it stop at 6.
>>
>> It may indeed be unexpected, but without seeing hypervisor
>> messages we won't know enough details about your issue.
> 
> Thank you for the reply!
> These messages shown are the only ones I get. I removed the rhgb and quiet
> boot options to show the messages I did get. Is there a way to show more of
> what you want?

Please see
https://wiki.xenproject.org/wiki/Reporting_Bugs_against_Xen_Project
and
https://wiki.xenproject.org/wiki/Xen_Serial_Console
or alternatively at least add "vga=keep".

Jan


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