VM freeze at 100% CPU (no windows)

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pos-sudo

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Jun 13, 2021
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Dear,

I really hope you guys could help me out. We have an Proxmox 8.0.3 installation with kernel 6.2.16-3. Lately we encouter issues the VM becoming unresponsive after it reached 100% CPU for a time, I have to stop and start again in order to get the VM back online. We have no Windows VMS only Ubuntu 20.04 LTS or Ubuntu 22.04 LTS. I never had this before on previous installations of PVE, is this something that is fixed in PVE 8.1 or something else I can do in order to prevent it from happening again.

I would like to hear from you.

Thanks regards,
 
I believe you need 6.2.16-4 or greater.
Upgrading your installation (and rebooting) should get you what you need.
 
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gzader said:
I believe you need 6.2.16-4 or greater.
Upgrading your installation (and rebooting) should get you what you need.
Click to expand...

Thanks for the quick reply. Is it true that this is completey random or is it an behaviour which I simple can reproduce?
 
pos-sudo said:
Just me thinking, could It be that it is the new cpu unit default which is 100 but this should be 1024 compared to other PVE installations?
Click to expand...
That's outside of my knowledge level. I've got enough knowledge to set up a cluster, ceph, ha, replication and import a drive image.
 
pos-sudo said:
Okay thank you! But you havent managed to mitigate the VM freeze problem?
Click to expand...
Not mine. But most of the people in that other thread seem to have fixed their issues. It's marked as solved.
My post is awaiting moderation before it shows up in the list. I may have a different issue entirely from the ones in that post.
In your case, I'd say run the upgrade. You're running a version with a known issue.

Also, let me know if it fixes it. I could use some good news today.
 
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gzader said:
Not mine. But most of the people in that other thread seem to have fixed their issues. It's marked as solved.
My post is awaiting moderation before it shows up in the list. I may have a different issue entirely from the ones in that post.
In your case, I'd say run the upgrade. You're running a version with a known issue.

Also, let me know if it fixes it. I could use some good news today.
Click to expand...

I would many many thanks!!
 
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gzader said:
Not mine. But most of the people in that other thread seem to have fixed their issues. It's marked as solved.
My post is awaiting moderation before it shows up in the list. I may have a different issue entirely from the ones in that post.
In your case, I'd say run the upgrade. You're running a version with a known issue.

Also, let me know if it fixes it. I could use some good news today.
Click to expand...

Hello,

I just updated and rebooted one of our "affected" servers to kernel 6.5 I will let you know if we encouter any further issues.
 
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Hello,

We just encountered another freeze but this time the freeze was 4000 above the integer previously noticed on "2147483648". The VM froze at 2147488074. I think we now could consider that the next update of the kernel (which already launched) fixed this random freeze issue. What do you think?
 
Does anyone know if kernel 6.2.16-20 has 'freeze bug fix' already?
VM Ubuntu Server 24.04.1 (up to date) randomly freeze - VM is not responding: hard stop and start helps. Host: Proxmox 8.0.2 - kernel 6.2.16-3-pve
 
mikon said:
Does anyone know if kernel 6.2.16-20 has 'freeze bug fix' already?
VM Ubuntu Server 24.04.1 (up to date) randomly freeze - VM is not responding: hard stop and start helps. Host: Proxmox 8.0.2 - kernel 6.2.16-3-pve
Click to expand...

Hello Mikon,

On all of our Proxmox Nodes is the bug fixed! We are running on Proxmox 8.1.4 - kernel Linux 6.5.13-1-pve
 
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Thank You but I'm worry about update from 8.0 to upper versions. I don't have cluster, just VMs. Should I upgrade to 8.1 or 8.3 ?
 
mikon said:
Thank You but I'm worry about update from 8.0 to upper versions. I don't have cluster, just VMs. Should I upgrade to 8.1 or 8.3 ?
Click to expand...

I understand. On the node we upgraded we did a restart after updating that node doesn't have a cluster either so we did the maintenance in the midnight because all the VMs will be offline during the restart of course. We also have Proxmox running om version 8.2.x but none of them on 8.3 so far. I don't think that there is any issue in 8.3 according to the problem as described above, but since we're not running that particular version we don't know for sure.
 
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