call control.Delete() occur err=cgroups: unable to remove path "/sys/fs/cgroup/devices/test"

[ycchildcoder]

I write a test，when I call control.Delete() ， it occur error： err=cgroups: unable to remove path "/sys/fs/cgroup/devices/test" inside err= unlinkat /sys/fs/cgroup/devices/test/tasks: operation not permitted I don't know why， when i remove control.Add(cgroups.Process{Pid: 1234})， it has not error。 thanks

[AkihiroSuda]

Adding os.Remove() before os.RemoveAll() solves the issue?

https://github.com/containerd/cgroups/blob/10dcde236e523a22c2f9f0013f7ebb8e4a065a5e/utils.go#L153