Subject: Re: [Bug #38292] slab vs lockdep vs debugobjects
From: Peter Zijlstra <peterz@infradead.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Kernel Testers List <kernel-testers@vger.kernel.org>,
        Maciej Rutecki <maciej.rutecki@gmail.com>,
        Florian Mickler <florian@mickler.org>
In-Reply-To: <20110626223134.GA24843@elte.hu>
References: <VDRaLpg_NZ.A.tnC.JZ6BOB@chimera>
	 <XWjMN7gBoXK.A.1zC.RZ6BOB@chimera> <1309125708.4756.1.camel@twins>
	 <20110626223134.GA24843@elte.hu>
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Date: Mon, 27 Jun 2011 00:52:19 +0200
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On Mon, 2011-06-27 at 00:31 +0200, Ingo Molnar wrote:
> * Peter Zijlstra <peterz@infradead.org> wrote:
> 
> > On Sun, 2011-06-26 at 23:23 +0200, Rafael J. Wysocki wrote:
> > > This message has been generated automatically as a part of a summary report
> > > of recent regressions.
> > > 
> > > The following bug entry is on the current list of known regressions
> > > from 2.6.39.  Please verify if it still should be listed and let the tracking team
> > > know (either way).
> > 
> > who said its a regression?
> 
> I suspect Rafael saw your mail to lkml with a nasty looking lockdep 
> message in it and assumed it was a new one?
> 
> Instead it's one that always had the chance to trigger?

Yeah, its just terribly hard, you need all the various debug options
enabled and a lot of luck. There's nothing involved that changed
recently afaik.
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