linux-kernel - Re: [RFC PATCH] drivers: char: Add a dynamic clock for the trace clock

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Date:	Sun, 8 Dec 2013 23:49:38 -0800
From:	Josh Triplett <josh@...htriplett.org>
To:	Sonny Rao <sonnyrao@...omium.org>
Cc:	linux-kernel@...r.kernel.org, John Stultz <john.stultz@...aro.org>,
	Stephane Eranian <eranian@...gle.com>,
	Pawel Moll <pawell.moll@....com>,
	Olof Johansson <olof@...om.net>,
	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [RFC PATCH] drivers: char: Add a dynamic clock for the trace
 clock

On Fri, Dec 06, 2013 at 04:34:11PM -0800, Sonny Rao wrote:
> Based on a suggestion from John Stultz.
> 
> This adds a dynamic clock device which can be used with clock_gettime
> to sample the clock source used for time stamping trace events in the
> kernel.  The only use for this clock source is to associate user space
> events with kernel events on a given kernel.  It is explicitly not
> supposed to be used as a generic time source and won't necessarily be
> consistent between kernels.
> 
> Signed-off-by: Sonny Rao <sonnyrao@...omium.org>

Reviewed-by: Josh Triplett <josh@...htriplett.org>
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