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    SubjectRe: SCHED_IDLE patch is a source of DoS
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    >So surely the fix is to have the SCHED_IDLE process temporarily lose its 
    >SCHED_IDLE status when it obtains any form of lock.

    Its a fix, sure. But it also complicates kernel scheduling to the
    point that future scheduling extensions will become very
    difficult.

    Also, "any form of lock" is a bit loose. Do we mean a "real" lock as
    implemented by down()/up(), and which includes the appropriate
    condition-waiting code, or spinlocks too, which provide no support for
    the

    lock();
    schedule();
    unlock();

    model ?

    --p

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