linux-kernel - Re: [PATCH] tracing: Rename lockdep event subsystem into lock

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Message-ID: <20091113093640.GB5243@nowhere>
Date:	Fri, 13 Nov 2009 10:36:42 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Mike Galbraith <efault@....de>,
	Paul Mackerras <paulus@...ba.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Hitoshi Mitake <mitake@....info.waseda.ac.jp>
Subject: Re: [PATCH] tracing: Rename lockdep event subsystem into lock

On Fri, Nov 13, 2009 at 10:10:09AM +0100, Peter Zijlstra wrote:
> On Fri, 2009-11-13 at 10:06 +0100, Frederic Weisbecker wrote:
> > Lockdep events subsystem gathers various locking related events such
> > as a request, release, contention or acquisition of a lock.
> > 
> > The name of this event subsystem is a bit of a misnomer since these
> > events are not quite related to lockdep but more generally to locking,
> > ie: these events are not reporting lock dependencies or possible
> > deadlock scenario but pure locking events.
> 
> But in order to get them you need pretty much all of lockdep, except
> PROVE_LOCKING. You get all the lock debugging, the lock tracking, the
> struct dep_map bloat etc.


Sure. But I think an event susbsystem name should reflect its
actual purpose despite the machinery that makes it work.

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