LXC (github master branch) shows lots of problem when host Linux booted with systemd.unified_cgroup_hierarchy, and it seems very untested to me. I was able to find lots of problems as below.
https://github.com/lxc/lxc/issues/3211 https://github.com/lxc/lxc/issues/3208 https://github.com/lxc/lxc/issues/3206 https://github.com/lxc/lxc/issues/3201 (closed but the bug still exists) https://github.com/lxc/lxc/issues/3198 In addition, the upstream developer seems reluctant to admit a problem, see https://github.com/lxc/lxc/issues/3201 Ryutaroh
