Hello,
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.
Please stand by while rebooting the system... INFO: task reboot:19800 blocked for more than 120 seconds "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message Call trace ...
Picture of the call trace: http://i59.tinypic.com/169olt1.png
CentOS: 6.5 Kernel: 3.10.23-11.el6.centos.alt.x86_64 Xen: 4.2.3 Server: Supermicro 6017R-WRF
Any idea how to troubleshoot or fix this issue? We can't reboot the dom0 during the week because domUs (2) are in production and this server is in a datacenter.
Kind regards,
Karl
On 05/03/14 15:09, Karl Johnson wrote:
Hello,
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?
David
On Wed, Mar 5, 2014 at 10:17 AM, David Vrabel david.vrabel@citrix.comwrote:
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
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David Vrabel -
Karl Johnson