CentOS virt - Mar 2017 - Xen C6 kernel 4.9.13 and testing 4.9.15 only reboots.

As a follow up I was able to test fresh install on Dell R710 and a Dell
R620 with success on CentOS 7.3 without issue on the new kernel.  My new
plan will be to just move this C6 to one of the C7 I just created.

On Wed, Mar 22, 2017, 6:27 AM PJ Welsh <pjwelsh at gmail.com> wrote:
> 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.
>
> Thanks
> PJ
>
>
>
>
> On Tue, Mar 21, 2017 at 1:39 PM, Kevin Stange <kevin at
steadfast.net> wrote:
>
> On 03/21/2017 07:48 AM, PJ Welsh wrote:
> > On Mon, Mar 20, 2017 at 5:21 PM, Ricardo J. Barberis
> > <ricardo at palmtx.com.ar <mailto:ricardo at
palmtx.com.ar>> wrote:
> >
> >     El Lunes 20/03/2017, PJ Welsh escribi?:
> >     > Still just starts the kernel and wihtin 4 seconds reboots
with
> 4.9.16-24.
> >     > Thanks
> >     > PJ
> >
> >     Edit grub's entry and add "noreboot" to your xen
parameters, maybe
> >     when the
> >     kernel panicks xen detects it and automatically reboots it.
> >
> >
> >
> > "noreboot" grub.conf option still produced nothing other
than a flashing
> > cursor on the top left. Also, neither num-lock nor caps-lock respond
at
> > this time... I seem no closer with helpful information other than,
"it's
> > broken" :(
> > Here is the grub.conf stanza for the kernel:
> > title CentOS (4.9.16-24.el6.centos.plus.x86_64)
> > root (hd0,1)
> > kernel /boot/xen.gz dom0_mem=3G,max:3G cpuinfo com1=115200,8n1
> > console=com1,tty loglvl=all gue
> > st_loglvl=all noreboot
> > module /boot/vmlinuz-4.9.16-24.el6.centos.plus.x86_64 ro
> > root=UUID=bc0727e1-882c-4fbc-a4d9-e4c
> > f754d72b7 rd_NO_LUKS rd_NO_LVM LANG=en_US.UTF-8 rd_NO_MD
> > SYSFONT=latarcyrheb-sun16 crashkernel=auto  K
> > EYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet reboot=pci max_loop=64
> > module /boot/initramfs-4.9.16-24.el6.centos.plus.x86_64.img
>
> Try removing "rhgb" and "quiet" from your boot options
as well.
>
> --
> Kevin Stange
> Chief Technology Officer
> Steadfast | Managed Infrastructure, Datacenter and Cloud Services
> 800 S Wells, Suite 190 | Chicago, IL 60607
> 312.602.2689 X203 | Fax: 312.602.2688
> kevin at steadfast.net | www.steadfast.net
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
>
>
>
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On 03/24/2017 11:35 AM, PJ Welsh wrote:
> As a follow up I was able to test fresh install on Dell R710 and a Dell
> R620 with success on CentOS 7.3 without issue on the new kernel.  My new
> plan will be to just move this C6 to one of the C7 I just created.
That sounds like a compiler problem, since I think the C6 and C7 kernels are
built from the same source.

--Sarah

The mystery gets more interesting... I now have a CentOS 7.3 Dell R710
server doing the exact same thing of rebooting immediately after the Xen
kernel load. Just to note this is a second system and not just the first
system with an update. I hope I'm not introducing something odd. They only
"interesting" thing I have done for historical reasons is to change
the
following /etc/sysconfig/grub line:
GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=6G,max:8G cpuinfo com1=115200,8n1
console=com1,tty loglvl=all guest_loglvl=all"
But I've done that on other servers without issue. In fact I have a Dell
R710 that DOES work with CentOS 7 and the new kernel... so confused.

On Fri, Mar 24, 2017 at 1:44 PM, Sarah Newman <srn at prgmr.com> wrote:
> On 03/24/2017 11:35 AM, PJ Welsh wrote:
> > As a follow up I was able to test fresh install on Dell R710 and a
Dell
> > R620 with success on CentOS 7.3 without issue on the new kernel.  My
new
> > plan will be to just move this C6 to one of the C7 I just created.
>
> That sounds like a compiler problem, since I think the C6 and C7 kernels
> are built from the same source.
>
> --Sarah
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
> https://lists.centos.org/mailman/listinfo/centos-virt
>
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