Re: [QEMU-KVM] Centos guest VM freezing

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On 1/9/19 11:50 AM, Akshar Kanak wrote:
Thanks for the reply 

We have seen the same guest VM freezing on vmware ESXi machine also ,

No wonder given that the guest remains 5 years out of date even when using a different hypervisor. Leaving aside that also the long-term kernel installed from ElRepo that you are using is also more then 4 years out of date.

Please update the OS(es) to the current supported OS versions ( that is, 7.6 / 6.10 ) and verify if the problems persist. But you've already been told that by several persons...

so we were interested in know in the internal condition of the guest vm when the freeze happened
How can we analyse the core file generated by "virsh dump " might help with that



Thanks and regards

On Wed, Jan 9, 2019 at 1:58 PM Manuel Wolfshant <wolfy@xxxxxxxxxxxxxxxxxx> wrote:
On 1/9/19 10:24 AM, Akshar Kanak wrote:
Dear team 
    I am running a centos guest VM  which freezes for every few days . The qemu-kvm on  shows 100% cpu utilization.
    Ping to the guest might work or may not work .Please can you tell me what approach can i take to debug it .
    using "virsh dump" I can dump the core of the  guest vm but I am not sure how to analyse it . 
    Guest Centos VM : "Linux GUESTCentOS70 3.10.0-123.4.4.el7.x86_64 #1 SMP Fri Jul 25 05:07:12 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux"
  "CentOS Linux release 7.0.1406 (Core)"
  1 vcpu and 2 GB ram 
Host machine : "Linux HOST 3.10.51-1.el6.elrepo.x86_64 #1 SMP Fri Aug 1 13:14:11 EDT 2014 x86_64 x86_64 x86_64 GNU/Linux"
"CentOS release 6.5 (Final)"
qemu-kvm package used : qemu-kvm-
Thanks and regards

I'd say that you should start by updating the OS on both host and guest. Both OSes are heavily outdated, you lack YEARS of updates.

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