Comment 0 for bug 1317179

When running a trusty userspace with a newer kernel (e.g. 3.15-rc4), attempting to start a container fails:

$ lxc-start -n p2
lxc_container: call to cgmanager_create_sync failed: invalid request
lxc_container: Failed to create net_cls:p2
lxc_container: Error creating cgroup net_cls:p2
lxc_container: failed creating cgroups
lxc_container: failed to spawn 'p2'

Iiurc, this seems to be caused new cgroups in the kernel which aren't enabled for systemd but that lxc tries to configure anyway.