linux-kernel - Re: [PATCH] Tracepoint: introduce tracepoint() API

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Message-ID: <1322261005.2550.6.camel@edumazet-laptop>
Date:	Fri, 25 Nov 2011 23:43:25 +0100
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Jason Baron <jbaron@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>,
	Christoph Lameter <cl@...ux-foundation.org>
Subject: Re: [PATCH] Tracepoint: introduce tracepoint() API

Le vendredi 25 novembre 2011 à 17:14 -0500, Mathieu Desnoyers a écrit :
> Introduce:
> 
>   tracepoint(event_name, arg1, arg2, ...)
> 
> while keeping the old tracepoint API in place, e.g.:
> 
>   trace_event_name(arg1, arg2, ...)
> 
> This allows skipping parameter side-effects (pointer dereference,
> function calls, ...) when the tracepoint is not dynamically activated.
> 
> This allows progressive (and partial) API transition from trace_*(...)
> to tracepoint(*, ...). This differs from the previous attempt to
> introduce this change by Jason Baron in that it supports both the
> original and new tracepoint APIs, which makes the transition smoother
> than having to change all instrumentation at once.
> 
> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
> Acked-by: Steven Rostedt <rostedt@...dmis.org>
> Acked-by: Jason Baron <jbaron@...hat.com>
> Link: https://lkml.org/lkml/2009/5/19/328
> CC: Eric Dumazet <eric.dumazet@...il.com>
> CC: Peter Zijlstra <peterz@...radead.org>
> CC: Ingo Molnar <mingo@...e.hu>
> CC: Christoph Lameter <cl@...ux-foundation.org>
> ---

Seems good to me, thanks Mathieu !

Acked-by: Eric Dumazet <eric.dumazet@...il.com>



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