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    SubjectRe: [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception
    On Tue, 29 Sep 2015, Peter Zijlstra wrote:

    > TASK_DEAD is special in that the final schedule call from do_exit()
    > must be done with preemption disabled.
    >
    > This leads to a violation of our new scheduling invariant which states
    > that the preempt count should be 2. Move the check for TASK_DEAD out
    > of the debug check and use it to decrement the preempt count (from 2
    > to 1).

    Reviewed-by: Thomas Gleixner <tglx@linutronix.de>


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