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    SubjectRe: [RFD] cgroup: about multiple hierarchies
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    On Tue, 2012-03-13 at 18:25 +0100, Peter Zijlstra wrote:
    > On Tue, 2012-03-13 at 10:10 -0400, Vivek Goyal wrote:
    > > Implementing hierarchy is a pain and is expensive at run time.
    >
    > Yeah, suck it up :-)
    >
    > I would really rather we mandate one implementation standard for
    > controllers for the sake of consistency and uniformity. A direct result
    > of doing away with the multiple hierarchy crap is that all controllers
    > are co-mounted. Allowing differences like this just doesn't make any
    > sense.
    >
    > So either we drop full hierarchy support from all controllers or we
    > deprecate and remove all non-hierarchical controllers.
    >
    > I'm fine with either, but I'm not fine with with the half-arsed
    > solutions proposed here.

    Note that before this whole discussion I was under the impressions it
    was mandated for a controller to be fully hierarchical. I'm very much
    surprised people were allowed to merge incomplete controllers like that.




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