linux-kernel - Re: [PATCH] tracing/lockdep: turn lock->name into an array

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Message-Id: <1239989260.23397.4848.camel@laptop>
Date:	Fri, 17 Apr 2009 19:27:40 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Zhaolei <zhaolei@...fujitsu.com>,
	Tom Zanussi <tzanussi@...il.com>,
	Li Zefan <lizf@...fujitsu.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] tracing/lockdep: turn lock->name into an array

On Fri, 2009-04-17 at 10:25 -0700, Jeremy Fitzhardinge wrote:
> Ingo Molnar wrote:
> > We could zap all pending trace entries on module unload (it is a 
> > rare operation)
> 
> ....Unless you're trying to trace something across a module unload.  I 
> don't know if its at all practical, but it would be nice to just zap the 
> pointers within the buffer, rather than the whole buffer.

I think the new __string() thing that's in the works will avoid the
whole problem by copying the string into the buffer, instead of keeping
a reference.

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