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

From: Steven Rostedt
Date: Tue Sep 29 2015 - 11:11:01 EST

On Tue, 29 Sep 2015 11:28:29 +0200
Peter Zijlstra <peterz@xxxxxxxxxxxxx> 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).
> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>

Reviewed-by: Steven Rostedt <rostedt@xxxxxxxxxxx>

-- Steve
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