以下Linux发行版默认启用cgroup v2：

• Fedora (since 31)
• Arch Linux (since April 2021)
• openSUSE Tumbleweed (since c. 2021)
• Debian GNU/Linux (since 11)
• Ubuntu (since 21.10)
• RHEL and RHEL-like distributions (since 9)

配置：

# sudo cat /etc/default/grub
GRUB_CMDLINE_LINUX="cgroup_no_v1=all systemd.unified_cgroup_hierarchy=1 cgroup_cpu=1 cgroup_enable=cpu"

# sudo update-grub

重启，

# sudo reboot

重启后，

# sudo stat -fc %T /sys/fs/cgroup/
cgroup2fs
# cat /sys/fs/cgroup/cgroup.controllers
# cpuset io memory hugetlb pids rdma

缺少了cpu项，解决方法：

https://rootlesscontaine.rs/getting-started/common/cgroup2/#enabling-cpu-cpuset-and-io-delegation