linux-kernel - Re: [patch 6/9] LTTng instrumentation

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Message-ID: <20090324204719.GA24320@elte.hu>
Date:	Tue, 24 Mar 2009 21:47:19 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Mathieu Desnoyers <mathieu.desnoyers@...ymtl.ca>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	ltt-dev@...ts.casi.polymtl.ca,
	Frederic Weisbecker <fweisbec@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"Frank Ch. Eigler" <fche@...hat.com>,
	Hideo AOKI <haoki@...hat.com>,
	Takashi Nishiie <t-nishiie@...css.fujitsu.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Eduard - Gabriel Munteanu <eduard.munteanu@...ux360.ro>
Subject: Re: [patch 6/9] LTTng instrumentation - timer


* Thomas Gleixner <tglx@...utronix.de> wrote:

> On Tue, 24 Mar 2009, Ingo Molnar wrote:
> > the init methods are missing from your patch entirely - and the rest 
> > is partially incomplete as well.
> > 
> > Instrumentation of the del_timer() variants is missing. For a 
> > complete lifetime analysis of timers this cannot be left out.
> 
> Look at the debugobjects hooks. They cover the complete timer life 
> time already.
> 
> Piggypacking tracepoints on those would simplify maintenance and 
> reduce the number of extra lines in the code.

makes sense. They dont cover itimers nor hrtimers though.

	Ingo
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