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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00

    * Serge Noiraud <serge.noiraud@bull.net> wrote:

    > > # CONFIG_DEBUG_RT_LOCKING_MODE is not set
    > >
    > > it seems to work fine. With the above enabled it hangs on both of my SMP
    > > systems as described above. :-/
    >
    > Same problem here. OK unsetting the CONFIG_DEBUG_RT_LOCKING_MODE.

    this one should be fixed in the latest patch. (note that when
    DEBUG_RT_LOCKING_MODE is set the spinlocks/rwlocks default to
    non-preemptible. You can set preemption it via
    /proc/sys/kernel/preempt_locks. You normally dont want to enable this
    option.)

    > I have another problem :
    > I can't boot.

    could you try the latest (-48-03) patch? I fixed a couple of things that
    might impact SMP booting.

    > ...trying to set up timer (IRQ0) through the 8259A ... failed.
    > ...trying to set up timer as Virtual Wire IRQ... <======= freeze
    >
    > Is it a problem or a CONFIG parameter ?

    a freeze is always a problem, whether it can be worked around via a
    CONFIG parameter or not. Generally if you see any reduction in
    functionality that deviates from the stock Linux kernel, it's a bug.

    Ingo
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