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    SubjectRe: [PATCH 6/6] sched: disabled rt-bandwidth by default

    * Max Krasnyansky <maxk@qualcomm.com> wrote:

    > Andi Kleen wrote:
    >> On Thu, Aug 28, 2008 at 01:19:13PM +0200, Peter Zijlstra wrote:
    >>> On Thu, 2008-08-28 at 13:09 +0200, Andi Kleen wrote:
    >>>>> Even if the system has multiple CPUs, and even if just a single CPU is
    >>>>> fully utilized by an RT task, without the rt-limit the system will still
    >>>>> lock up in practice due to various other factors: workqueues and tasks
    >>>>> being 'stuck' on CPUs that host an RT hog.
    >>>> The load balancer will not notice that a particular CPU is busy
    >>>> with real time tasks?
    >>> Not currently, working on that though.
    >>
    >> I wonder if it would make sense to break affinities in extreme case?
    >> With that even the workqueues would work again.
    >
    > Please lets not break affinity :).

    correct, breaking affinity is a rather stupid idea.

    Ingo


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