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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.12-rc1-V0.7.43-00

    * Esben Nielsen <simlo@phys.au.dk> wrote:

    > > Now the question is, who will fix it? Preferably the maintainers, but I
    > > don't know how much of a priority this is to them. I don't have the time
    > > now to look at this and understand enough about the code to be able to
    > > make a proper fix, and I'm sure you have other things to do too.
    >
    > How about adding a
    > if(rt_task(current)) {
    > WARN_ON(1);
    > mutex_setprio(current, MAX_PRIO-1)
    > }
    > ?
    >
    > to find all calls to yields from rt-tasks. That will force the user
    > (aka the real-time developer) to either stop calling the subsystems
    > still using yield from his RT-tasks, or fix those subsystems.

    i've added this to the -43-08 patch, so that we can see the scope of the
    problem. But any yield() use could become a problem due to priority
    inheritance. (which might eventually be expanded to userspace locking
    too)

    Ingo
    -
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