linux-kernel - Re: [PATCH] lockdep: lock contention tracking

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Message-ID: <20070521060828.GB20277@elte.hu>
Date:	Mon, 21 May 2007 08:08:28 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Bill Huey <billh@...ppy.monkey.org>
Cc:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	linux-kernel@...r.kernel.org, Jason Baron <jbaron@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>
Subject: Re: [PATCH] lockdep: lock contention tracking


* Bill Huey <billh@...ppy.monkey.org> wrote:

> On Sun, May 20, 2007 at 12:30:26PM +0200, Peter Zijlstra wrote:
> > The 4 points are the first 4 unique callsites that cause lock contention
> > for the specified lock class.
> > 
> > writing a 0 to /proc/lockdep_contentions clears the stats
> 
> We should talk about unifying it with my lockstat work for -rt so that 
> we have a comprehensive solution for the "world". But you know that 
> already :)

To me it appears Peter's stuff is already a pretty complete solution on 
its own, and it's a whole lot simpler (and less duplicative) than your 
lockstat patch. Could you list the specific items/features that you 
think Peter's stuff doesnt have?

	Ingo
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