I can confirm that this fixes the races I saw with cgroup-bin and works perfectly for me with libvirt, kvm and arkose.
I'd definitely +1 getting this uploaded and replace the current Recommends on the lxc package from "cgroup-bin" to "cgroup-lite | cgroup-bin" so that both are still allowed but cgroup-lite is preferred.
I can confirm that this fixes the races I saw with cgroup-bin and works perfectly for me with libvirt, kvm and arkose.
I'd definitely +1 getting this uploaded and replace the current Recommends on the lxc package from "cgroup-bin" to "cgroup-lite | cgroup-bin" so that both are still allowed but cgroup-lite is preferred.