http://lkml.org/lkml/2010/11/16/330
А тут предлагают:
Here's my super-complex patch btw, to achieve exactly the same thing
from userspace without involving any kernel or systemd patching and
kernel-side logic. Simply edit your own ~/.bashrc and add this to the end:

  if [ "$PS1" ] ; then  
          mkdir -m 0700 /sys/fs/cgroup/cpu/user/$$
          echo $$ > /sys/fs/cgroup/cpu/user/$$/tasks
  fi
Then, as the superuser do this:

  mount -t cgroup cgroup /sys/fs/cgroup/cpu -o cpu
  mkdir -m 0777 /sys/fs/cgroup/cpu/user

Done. Same effect. However: not crazy.