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    Subject[patch] Real-Time Preemption, -RT-2.6.9-rc4-mm1-U9

    i have released the -U9 Real-Time Preemption patch, which can be
    downloaded from:

    http://redhat.com/~mingo/realtime-preempt/

    this too is a fixes-only release. It includes more driver fixes and
    improvements from Thomas Gleixner.

    Changes since -U8.1:

    - USB semaphore->completion conversion from Thomas Gleixner

    - netconsole fixes from Michal Schmidt

    - fbcon fixes

    - added counted semaphores, this is now used by firewire, XFS and ACPI.
    This could fix the firewire breakage - but testing would be welcome.

    - PREEMPT_ACTIVE irqs-enabled critical path removal.

    - fixed irqs-off raw spinlock primitives on UP: they enabled irqs
    before enabling preemption, creating a window for an interrupt to
    slip in and increase the critical path.

    - made the deadlock detector not crash the current process - it will
    just hang. This produces far nicer log output while still not
    endangering stability. Also, fixed a bug in the detector that happens
    if the trace buffer overflows.

    - made the atomic-counter-underflow detector non-fatal as well, for the
    same reasons.

    to create a -U9 tree from scratch, the patching order is:

    http://kernel.org/pub/linux/kernel/v2.6/linux-2.6.8.tar.bz2
    + http://kernel.org/pub/linux/kernel/v2.6/testing/patch-2.6.9-rc4.bz2
    + http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/2.6.9-rc4-mm1.bz2
    + http://redhat.com/~mingo/realtime-preempt/realtime-preempt-2.6.9-rc4-mm1-U9

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