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SubjectRe: [RFC PATCH 1/2] New cgroup subsystem API (->initialize())
> I believe hierarchical accounting is natural. Since the CPU controller
> divides its bandwidth as per hierarchy, it makes sense for the
> accounting to also be hierarchical. I guess this is a reasonable
> compromise. But how do you still check if the group you are accounting
> for is the root group or not? (Unless I am missing something obvious)
>

As easy as: if (cgrp->parent == NULL) or if (cgrp == cgrp->top_cgroup)



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