linux-kernel - Re: linux-next 20111025: warnings in rcu_idle_exit_common()/rcu_idle_enter

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Date:	Thu, 10 Nov 2011 17:35:24 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	paulmck@...ux.vnet.ibm.com
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: linux-next 20111025: warnings in
 rcu_idle_exit_common()/rcu_idle_enter_common()

On Mon, 2011-10-31 at 15:14 -0700, Paul E. McKenney wrote:
> Peter, I have been using "idle_cpu(smp_processor_id()))" to verify that
> I really am running in the context of the idle task when RCU believes
> that the current CPU has gone idle. 

I think this is sorted since, but just to clarify idle_cpu() was meant
to test if the cpu was idle, this is something different from actually
running the idle thread.


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