linux-kernel - Re: [PATCH] Separate lock events with types

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Date:	Tue, 06 Apr 2010 10:26:06 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Hitoshi Mitake <mitake@....info.waseda.ac.jp>,
	linux-kernel@...r.kernel.org, mingo@...e.hu, paulus@...ba.org,
	tglx@...utronix.de, gregkh@...e.de
Subject: Re: [PATCH] Separate lock events with types

On Sat, 2010-03-27 at 00:33 +0100, Frederic Weisbecker wrote:
> So if we store the lock type in the lockdep_map, we can just dump
> the type on lock class initialization:
> 
> - on register_lock_class
> - on event injection to catchup with lock that have already registered
> 
> That's what does my tree perf/inject (minus the lock type), but this
> all require a redesign, in both ftrace and perf sides.
> 

Right, and I don't like to bloat dep_map for no reason. I still think
all this lock type stuff is a waste of time.

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