[CentOS-virt] Machine freeze
timkom at gmail.com
Wed Apr 29 20:09:05 UTC 2009
I would say no. Our system has freezed completely, it did not reboot. Our
issue was caused by concurrent access to scheduler method that created a
deadlock.I can see some out of memory messages, do you still have enough
memory for Dom0?
2009/4/29 Mathew S. McCarrell <mccarrms at gmail.com>
> I'm wondering if it is possible that your problem is related to mine.
> Earlier today I had to restart one of our domUs on one of our systems. I
> used xm shutdown instead of xm destroy and then did xm list to determine if
> the domU had shutdown or not. Upon issuing xm list a second time, the
> entire server crashed and rebooted.
> I've checked the logs and have yet to find anything. I've attached a
> transcript of the commands as I executed them on the server. The system is
> running CentOS 5.3 x64 w/Xen (kernel 2.6.18-128.1.6.el5xen).
> Any thoughts?
> Mathew S. McCarrell
> Clarkson University '10
> mccarrms at gmail.com
> mccarrms at clarkson.edu
> 2009/4/7 Maros Timko <timkom at gmail.com>
> Hi all,
>> thanks to all for valuable replies.
>> It seems like we identified the issue. We assured that it is not HW
>> related as it was already reproduced on different machines and platforms,
>> with different BIOS versions.
>> We are running a system performance/statistics collector that executes
>> "xentop" command on Dom0 regularly. This is causing issues. If we execute:
>> xentop -b -d 0.1 > /dev/null
>> in multiple instances, it will freeze the system.
>> It was reproduced on CentOS 5.3 (kernel-xen-2.6.18-128.1.6.el5) system.
>> There is created a bug for this issue:
>> With regards,
>> 2009/4/3 Maros TIMKO <timko at pobox.sk>
>>> Hi all,
>>> we are running CentOS 5.2 Xen virtualization system with the latest
>>> CentOS packages with couple of VMs on DELL PowerEdge. "Sometimes" the whole
>>> machine freezes without anything in log files, anything on the console.
>>> "Sometimes" really means we cannot define why or when. Sometimes the machine
>>> was idle with just one VM, sometimes quite busy with couple of VMs.
>>> Has anybody had the same experience? If yes, any hints on how to resolve
>>> it or how to trace the cause?
>>> CentOS-virt mailing list
>>> CentOS-virt at centos.org
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