cgroup v2 offers several improvements over cgroup v1, including a unified hierarchy, safer sub-tree delegation, new features such as Pressure Stall Information, and enhanced resource management and isolation. [1]

Managed services have a need to expose this option to customers [2], and will have to rely on the HyperShift Operator exposing this configuration option.

Open questions

• There may be a dependency on crun as a prerequisite for cgroup v2, but unclear. Documentation [3] seems to imply that there is no dependency

[1] https://docs.openshift.com/container-platform/4.13/installing/install_config/enabling-cgroup-v2.html
[2] https://docs.google.com/document/d/1A8X0v0_4CGOng_7B1GVgish3Ha9_8xA94QbrYFTLvsE/edit
[3] https://docs.openshift.com/container-platform/4.13/nodes/clusters/nodes-cluster-cgroups-2.html#nodes-clusters-cgroups-2_nodes-cluster-cgroups-2