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