linux-kernel - Re: [PATCH 1/3] trace points: power: remove 'cpu_id' from trace_clock

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Date:	Fri, 19 Aug 2011 11:14:00 -0400
From:	Steven Rostedt <rostedt@...dmis.org>
To:	tom.leiming@...il.com
Cc:	fweisbec@...il.com, jean.pihet@...oldbits.com, mingo@...hat.com,
	trenn@...e.de, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [PATCH 1/3] trace points: power: remove 'cpu_id' from
 trace_clock_*

On Fri, 2011-08-19 at 23:04 +0800, tom.leiming@...il.com wrote:
> From: Ming Lei <tom.leiming@...il.com>
> 
> This patch removes the 'cpu_id' parameter of the clock_*
> trace point, based on the ideas below:
> 
> - the cpu_id which is passed to trace point is always the current
>   cpu
> - the current cpu info has been included into the trace result already
> - smp_processor_id() can't be used safely in preemptible context.
> 

Do you know if these changes wont break powertop?

-- Steve


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