Stuff about cgroups v2.

CONFIG_CGROUPS=y
CONFIG_CGROUP_FREEZER=y
CONFIG_CPUSETS=y
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_SCHED=y

menuconfig CGROUPS
        bool "Control Group support"
        select KERNFS
        help
          This option adds support for grouping sets of processes together, for
          use with process control subsystems such as Cpusets, CFS, memory
          controls or device isolation.
          See
                - Documentation/scheduler/sched-design-CFS.rst  (CFS)
                - Documentation/admin-guide/cgroup-v1/ (features for grouping, isolation
                                          and resource control)

          Say N if unsure.

obj-$(CONFIG_CGROUPS) += cgroup/