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    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.13-rc4-V0.7.52-01

    * Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:

    > because end_buffer_async_read/write use bit_spin_(un)lock and I do not
    > know how those interact with -RT.

    bit_spin_lock is preemptible too - but it's not a too nice construct.
    What seems to have happened in your trace is that local_irq_disable()
    was used too in combination with bit-spinlocks, and a spinlock was taken
    from within it. The best fix would be to get rid of bit-spinlocks ...

    Ingo
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