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    SubjectRe: report a bug about sched_rt
    2009/7/24 Peter Zijlstra <>:
    > On Fri, 2009-07-24 at 23:07 +0800, sen wang wrote:
    >> 2009/7/24 Peter Zijlstra <>:
    >> > On Fri, 2009-07-24 at 22:04 +0800, sen wang wrote:
    >> >
    >> >> just one question:
    >> >> if cpu is free and there is running state task, how you do?
    >> >> schedule the task up? or schedule idle task up?
    >> >
    >> > Well, when an RT group is over the bandwidth limit I don't consider them
    >> > runnable. Therefore, failing to find any other tasks, we run the idle
    >> > task.
    >> >
    >> you havn't anwser the question: if cpu is free, should we  schedule the
    >> running state task or idle task?
    > It it not runnable because the group is over its limit.
    >> face the error and fix it! ok?
    > Please tone down and re-read the explanations I gave.
    > The throttle is an H-CBS services for RT task groups, meant to provide
    > isolation through a fixed resource guarantee.
    > Any process actually hitting the throttle means a miss configured system
    > -- unless its a temporary overload and you're able to deal with those.
    > The single group case is simply the trivial case thereof.
    > Your proposed change does not generalize to such a framework, and while
    > it might work with the current code, it doesn't serve a use-case
    > considered in this architecture and will render the interface
    > inconsistent.
    > Furthermore, future work in this area will not be able to support your
    > changed semantics in a sane fashion.
    > I've yet to see any coherent explanation of your problem, and quite
    > frankly I find your attitude offensive.
    > As you say, Linux is an open-source effort, and you're free to do with
    > your copy as you see fit (provided you stick to the rules stipulated by
    > the GPLv2). However as co-maintainer of the mainline scheduler I see no
    > reason to entertain your change, nor for that matter to continue this
    > discussion.

    sorry for my tone, If you feel hurted. I apologize.

    But I still hold my viewpoint. I just want the 100-x time should be
    used by running task.
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