File: //usr/share/doc/lxcfs/README.Debian
libpam-cgfs
===========
In the past, Ubuntu carried a systemd patch to provide logged-in users with
cgroups which they could administer. This can now be done by the pam_cgfs
module.
By default, pam_cgfs will create a new cgroup for the user for all
controllers other than name=systemd, but if '-c <controllerlist>' is passed
then only the listed controllers are handled. (controllerlist must be
comma-delimited) The default list of controllers to handle is listed in
/usr/share/pam-configs/cgfs, and is set to only freezer and memory. To edit
the list, do so in /etc/pam.d/common-session.
Note, this conflicts with the libpam-cgm module which also creates cgroups for
logged-in users, but does so by talking to the cgmanager or cgproxy daemon.