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

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Message-ID: <20070521060446.GA4593@gnuppy.monkey.org>
Date:	Sun, 20 May 2007 23:04:46 -0700
From:	Bill Huey (hui) <billh@...ppy.monkey.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:	linux-kernel@...r.kernel.org, Jason Baron <jbaron@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	"Bill Huey (hui)" <billh@...ppy.monkey.org>
Subject: Re: [PATCH] lockdep: lock contention tracking

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 :)

Unifying lock initializer hash key initialization functions is a key
first step to that. Keep in mind, we can do more with this mechanism
than just kernel locks and we should probably keep that open and not
code into a corner.

bill

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