Actually I managed to make some experiments and - WITHOUT rolling back to 5.13 kernel, I changed machine type to i440...and had none of these VM's stops.
In windows event viewer there are still some kernel errors, but I am not sure if they are related.
Most important is that none...
Have some update on the situation... Unexpected VM stop happend 2 more times, on another host. Each time during Windows Srv 2022 update.
It was ONLY these two more times, and I haven't observed it since then.
@Stoiko Ivanov :
I cannot check KVM64 cpu as this is production VM and it slows very...
It's second morning when I find one of the nodes with pvestatd not started. Manual restart solves the problem.
I attach info from logs. No VM's on this machine, it's purpose is just to give vote in cluster.
Uname -a: Linux srv1 5.15.35-1-pve #1 SMP PVE 5.15.35-2 (Thu, 05 May 2022 13:54:35...
Sorry for late anwser - wasn't able to reproduce the problem so far \-("_")-/
VM is running Windows Server 2022 app for accounting (many small databases on mssql) and IIS for web services of this app.
The configuration worked great for 2 years and now this one separate case happened...
This night one of my backups didn't went well. QNAP was its destination. Second backup of this machine went well but it was destined to PBS.
Kernel 5.15.30-2, QNAP NFS version set to 4. I attach email from proxmox and short info from syslog, lscpu and vm confguration.
Thats the first...