Re: [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception

[Thomas Gleixner]

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@xxxxxxxxxxxxx>
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