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    SubjectRe: [patch] cgroups: disallow attaching kthreadd
    On Thu, 5 Apr 2012, Mike Galbraith wrote:

    > That question made perfect sense to me. Putting a global resource in
    > any bin of any sort makes little if any sense.
    >

    This has nothing to do with global resources, it has to do with
    PF_THREAD_BOUND since those threads cannot move amongst these cgroups.

    For cgroups that do not have anything to do with cpu affinity,
    PF_THREAD_BOUND means nothing to their attachment rules. This patch is
    addressing kthreadd since it, as the changelog says, has the ability to
    spawn threads that become PF_THREAD_BOUND. By logic, we then can't allow
    kthreadd to be attached to cgroups where PF_THREAD_BOUND matters either.

    I know we've been through several iterations on this over the past several
    months and the patch getting dropped a couple times along the way, but I
    really do appreciate your time and effort spent in developing this fix,
    it's very helpful.


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