[root@bogon ~]# ls -l /sys/fs/cgroup
total 0
-r—-r—r--.  1 root root 0 Apr 29 12:03 cgroup.controllers
-rw-r—r--.  1 root root 0 Apr 29 12:03 cgroup.max.depth
-rw-r—r--.  1 root root 0 Apr 29 12:03 cgroup.max.descendants
-rw-r—r--.  1 root root 0 Apr 29 12:03 cgroup.procs
-r—-r—r--.  1 root root 0 Apr 29 12:03 cgroup.stat
-rw-r—r--.  1 root root 0 Apr 29 12:18 cgroup.subtree_control
-rw-r—r--.  1 root root 0 Apr 29 12:03 cgroup.threads
-rw-r—r--.  1 root root 0 Apr 29 12:03 cpu.pressure
……