No, I have not followed those instructions yet. These were production servers that I had scheduled firmware updates late Sunday evening. The first time I though the error was a fluke and only began to research it after the second failure (and still no firmware updates due to the power-cycle). I may try to sneak in a restart of one of the systems late Sunday night US CT. Still not sure why the running vm's would stop the reboot... The server shows that it was suppose to be restarting. I have had a similar stuck on restarting message (minus all the umount errors) on some Dell T105's running CentOS 6.5 and the "reboot=pci" grub.conf kernel option is what ended up working for them. I have not tested that possible option yet, either since that would take 2 reboots to put into place. On Fri, Mar 7, 2014 at 10:43 PM, Pasi Kärkkäinen <pasik at iki.fi> wrote: > On Thu, Mar 06, 2014 at 01:54:22PM -0600, Phillippe Welsh wrote: > > > > Subject: Re: [CentOS-virt] Xen4CentOS kernel panic on dom0 reboot > > > > On Wed, Mar 5, 2014 at 10:17 AM, David Vrabel <david.vrabel at > citrix.com>wrote: > > > > > > On 05/03/14 15:09, Karl Johnson wrote: > > > > > I've been using Xen4CentOS for the last 3 months. It's working > fine and > > > > > dom0/domUs are stable but the server does a kernel panic when > doing a > > > > > reboot and the server has to be hard reset manually. It has kernel > panic > > > > on the 3 last reboot. > > > > > > > > There is a xenbus device still present and during shutdown it is > trying > > > > to set it to CLOSED but at this point xenstored isn't running and the > > > > xenbus write stalls. > > > > > > > > Do you have VMs that are still running when you attempt a reboot? > If so > > > > shutting them down will likely avoid this. > > > > > > > > Can you provide the output of xenstore-ls prior to attempting a > reboot? > > > > > > > > > > > > > > > I though Xen init.d scripts would stop all of them before rebooting? > Here's > > > the output of chkconfig and xenstore-ls: > > > > > > http://pastebin.centos.org/8186/ > > > > > > Thanks, > > > > > > Karl > > > > I've got the "me-too" on the reboot hang issue for 2 different Dell > R710's with xen-4.2.4-29.el6 and at least the kernels kernel-3.10.25-11.el6.centos.alt.x86_64 > and kernel-3.10.23-11.el6.centos.alt.x86_64. I have not tried to reboot > with the latest kernel-3.10.32-11.el6.centos.alt.x86_64 (if kernel even > makes a difference). I *have* had dom0_mem=1024M,max:1024M option in place > for all of them with only 6 VM's. > > > > Any new suggestions? > > > > So did you make sure all the VMs are shut down before trying to reboot > dom0? > > -- Pasi > > _______________________________________________ > CentOS-virt mailing list > CentOS-virt at centos.org > http://lists.centos.org/mailman/listinfo/centos-virt > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.centos.org/pipermail/centos-virt/attachments/20140308/b9a670cc/attachment-0004.html>