@l33int13h ls -l /dev/cgroup/cpu You should see a directory named applications, another named desktop and a bunch of files. If it says "file or directory does not exist" then the patch hasn't applied.
The patch does this by creating multiple classes of task /dev/cgroup/cpu/tasks /dev/cgroup/cpu/desktop/tasks /dev/cgroup/cpu/applications/tasks /dev/cgroup/cpu/applications/standby/tasks /dev/cgroup/cpu/applications/launcher/tasks
/dev/cgroup/cpu/user/11601/task /dev/cgroup/cpu/user/11601/notify_on_release /dev/cgroup/cpu/user/11723/task /dev/cgroup/cpu/user/11723/notify_on_release /dev/cgroup/cpu/user/11798/task /dev/cgroup/cpu/user/11798/notify_on_release /dev/cgroup/cpu/user/19897/task /dev/cgroup/cpu/user/19897/notify_on_release /dev/cgroup/cpu/user/2116/task /dev/cgroup/cpu/user/2116/notify_on_release ... and so