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

From	Steven Rostedt <rostedt@goodmis.org>
Newsgroups	linux.kernel
Subject	Re: [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception
Date	2015-09-29 17:20 +0200
Message-ID	<qe4Rb-1Nk-9@gated-at.bofh.it> (permalink)
References	<qdZHQ-2IS-3@gated-at.bofh.it> <qdZHQ-2IS-23@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Tue, 29 Sep 2015 11:28:29 +0200
Peter Zijlstra <peterz@infradead.org> 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@infradead.org>

Reviewed-by: Steven Rostedt <rostedt@goodmis.org>

-- Steve
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[RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception Peter Zijlstra <peterz@infradead.org> - 2015-09-29 11:50 +0200
  Re: [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception Frederic Weisbecker <fweisbec@gmail.com> - 2015-09-29 15:50 +0200
  Re: [RFC][PATCH 04/11] sched: Rework TASK_DEAD preemption exception Steven Rostedt <rostedt@goodmis.org> - 2015-09-29 17:20 +0200

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