A question about cpuset

On libvirt unprivileged container the lxc cgroup is active.

find /sys/ -name *cpuse* 2> /dev/null |wc -l
465

On classic (lxc-start) container (unprivileged) is not. Why?

find /sys/ -name *cpuse* 2> /dev/null |wc -l
0

This is the config file

# Distribution configuration
lxc.include = /usr/share/lxc/config/common.conf
lxc.include = /usr/share/lxc/config/userns.conf
lxc.arch = linux64

# Container specific configuration
lxc.include = /etc/lxc/default.conf
lxc.idmap = u 0 165536 65536
lxc.idmap = g 0 165536 65536
lxc.cgroup.devices.allow = a
lxc.mount.auto = proc:rw sys:rw cgroup:rw:force
lxc.apparmor.profile = unconfined
lxc.apparmor.allow_nesting = 1
lxc.rootfs.path = dir:/var/lxcunpriv/.local/share/lxc/node5/rootfs
lxc.uts.name = node5

What I miss? I need it to run a kubernetes cluster (for testing) on lxc container.