Describe cgroup v2 freezer interface in the cgroup v2 admin guide.
Signed-off-by: NRoman Gushchin <guro@fb.com>
Reviewed-by: NMike Rapoport <rppt@linux.ibm.com>
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: linux-doc@vger.kernel.org
Cc: kernel-team@fb.com