Chris Down
a57669d290
systemd currently doesn't really expend much effort in disabling controllers. unit_realize_cgroup_now *may* be able to disable a controller in the basic case when using cgroup v2, but generally won't manage as downstream dependents may still use it. This code doesn't add any logic to fix that, but it starts the process of moving to have a breadth-first version of unit_realize_cgroup_now for enabling, and a depth-first version of unit_realize_cgroup_now for disabling.
systemd - System and Service Manager
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