参考Ubuntu 启用 cgroup v2 方式
sudo cat /etc/default/grub
...
GRUB_CMDLINE_LINUX="cgroup_no_v1=all systemd.unified_group_hierarchy=1 cgroup_cpu=1 cgroup_enable=cpu" ...

sudo update-grub

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

cgroup v2 启用参考
https://rootlesscontaine.rs/getting-started/common/cgroup2/#enabling-cpu-cpuset-and-io-delegation

echo +cpu > /sys/fs/cgroup/cgroup.subtree_control

-bash: echo: write error: Invalid argument

查了官方资料大意是 cgroup v2不支持实时调度器

https://stackoverflow.com/questions/77148627/cgroupsv2-and-real-time-processes

可是我想起用cgroup v2 做k8s方面的实验，能否解决呢？ deepin os/ uos 要怎么设置?
centos 系统下 禁用并关闭 rtkit-daemon 就可以了 , 参考 https://access.redhat.com/solutions/6582021