linux-kernel - Re: [RFC][PATCH] lockdep: Introduce wait-type checks

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Date:	Thu, 9 Jan 2014 23:12:21 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Dave Jones <davej@...hat.com>, linux-kernel@...r.kernel.org,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Steven Rostedt <rostedt@...dmis.org>,
	Oleg Nesterov <oleg@...hat.com>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [RFC][PATCH] lockdep: Introduce wait-type checks

On Thu, Jan 09, 2014 at 12:33:26PM -0500, Dave Jones wrote:
> On Thu, Jan 09, 2014 at 12:15:16PM +0100, Peter Zijlstra wrote:
>  > Subject: lockdep: Introduce wait-type checks
>  > From: Peter Zijlstra <peterz@...radead.org>
>  > Date: Tue, 19 Nov 2013 21:45:48 +0100
>  > 
>  > This patch extends lockdep to validate lock wait-type context.
> 
> ooh, a new toy.
> 
> *boom*
> 

Oh cute, I'll have to stare at slub. ISTR there's a current slub-rt
patch floating about.

I'd have to just blindly convert slub to raw_spinlocks (although that'll
get rid of the warning) without trying to limit the lock hold time of
raw_spinlocks.

> nitpick: Why is the backtrace printed twice ?

Because I'm an idiot, lemme fix that ;-)
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