I've just installed a new system with latest PVE 5.1 with all updates on a Supermicro board with the Intel vulnerability patches in BIOS and a Xeon E5-2620v4. I experience high load on idle kvm VMs, about 6-7%. On the guest, CPU utilisation is 0-0.1%, all fine. I've tried multiple CPU types, virtio or virtio scsi storage, with or without guest agent. Without guest agent it's a bit better at 3-4% but still too much. All hosts are either Debian 8 or 9. Stock or latest backports kernel, doesn't make a difference. Storage is zfs.
What else could I try? Does anyone have suggestions? Is it a known or accepted fault?
What else could I try? Does anyone have suggestions? Is it a known or accepted fault?