linux-kernel - Re: [PATCH 3/3][RFC] cpuidle/tracing: Denote the tracepoints as being in rcu_idle

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Message-ID: <1328647785.2200.112.camel@gandalf.stny.rr.com>
Date:	Tue, 07 Feb 2012 15:49:45 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	paulmck@...ux.vnet.ibm.com
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rob Herring <robherring2@...il.com>,
	Nicolas Pitre <nicolas.pitre@...aro.org>,
	Kevin Hilman <khilman@...com>,
	Josh Triplett <josh@...htriplett.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Len Brown <len.brown@...el.com>
Subject: Re: [PATCH 3/3][RFC] cpuidle/tracing: Denote the tracepoints as
 being in rcu_idle_exit() section

On Tue, 2012-02-07 at 07:40 -0800, Paul E. McKenney wrote:
> On Tue, Feb 07, 2012 at 09:56:56AM -0500, Steven Rostedt wrote:
> > From: Steven Rostedt <srostedt@...hat.com>
> > 
> > As the tracepoints in the cpuidle code are called when rcu_idle_exit() is in
> > effect, the _rcuidle() version must be used, otherwise the rcu_read_lock()s
> > that protect the tracepoint will not be honored.
> > 
> > Cc: Len Brown <len.brown@...el.com>
> > Cc: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>
> > Signed-off-by: Steven Rostedt <rostedt@...dmis.org>
> 
> Looks good to me!
> 
> Reviewed-by: Paul E. McKenney <paulmck@...ux.vnet.ibm.com>

Thanks, but does this include patch 2/3 as well?

-- Steve


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