linux-kernel - Re: [PATCH] lockdep: Add nr_save_trace

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Message-ID: <1272005525.1646.23.camel@laptop>
Date:	Fri, 23 Apr 2010 08:52:05 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Yong Zhang <yong.zhang@...driver.com>
Cc:	John Kacur <jkacur@...il.com>, LKML <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	Sven-Thorsten Dietrich <thebigcorporation@...il.com>,
	Clark Williams <williams@...hat.com>,
	"Luis Claudio R. Goncalves" <lgoncalv@...hat.com>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>,
	Gregory Haskins <ghaskins@...ell.com>
Subject: Re: [PATCH] lockdep: Add nr_save_trace_invocations counter

On Fri, 2010-04-23 at 10:58 +0800, Yong Zhang wrote:
> 
> > +unsigned long nr_save_trace_invocations_type[LOCK_USAGE_STATES];
> 
> And each item in this array will equal to nr_hardirq_[un]safe,
> nr_softirq_[un]safe and such things under lockdep_stats_show(). Right?

Well, the stats for RECLAIM_FS as missing, so at the very least we need
to re-write lockdep_stats_show() to use the lockdep_states.h magic.



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