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SubjectRe: [PATCH] Add hierarchical accounting to cpu accounting controller
>> cpuacct was designed to count cpu usage of a group of tasks, and now some people
>> want it to also take child group's usage into account, so I think this is a feature
>> request but not a bug fix.
>>
>
> I disagree. The child is a part of the parent's hierarchy, and therefore
> its usage should reflect in the parent's usage.
>

In memcg the child's usage doesn't reflect in its parent's usage. ;)

Balbir just posted a patchset to add hierarchy support in memcg, and added memory.feature
to disable/enable this feature. Is it for performance only or also for keeping the user
interface/behavior unchanged?


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