Regression in CPU utilization virtualization

[webdock-io]

LXD v 5.0.0
Ubuntu Jammy 5.15.0-27-generic

Create a Ubuntu container and stress all your CPUs on the host system, e.g. stress -c 72 enter the container and run htop and you will see the system reports CPUs utilization at 100% across all CPUs. Load avg. reporting is OK at ~0

This seems to be some regression as on Focal 5.13.0-35-generic systems running v4.19 CPU utilization is correctly reported as ~0% across all threads inside the container.

[webdock-io]

I realized this is probably an lxcfs issue so I am closing this and opening lxc/lxcfs#538