linux-kernel - Re: [patch V3 7/7] rtmutex: Avoid pointless requeueing in the deadlock detection chain walk

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Date:	Tue, 10 Jun 2014 22:46:14 +0200 (CEST)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Brad Mouring <bmouring@...com>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Jason Low <jason.low2@...com>
Subject: Re: [patch V3 7/7] rtmutex: Avoid pointless requeueing in the deadlock
 detection chain walk

On Tue, 10 Jun 2014, Steven Rostedt wrote:
> On Tue, 10 Jun 2014 19:43:16 +0200 (CEST)
> Thomas Gleixner <tglx@...utronix.de> wrote:
> 
> > On Tue, 10 Jun 2014, Steven Rostedt wrote:
> > 
> > > On Tue, 10 Jun 2014 09:57:25 -0500
> > > "Brad Mouring" <bmouring@...com> wrote:
> > > 
> > > 
> > > > > +		/* Store whether owner is blocked itself and drop locks */
> > > > > +		next_lock = task_blocked_on(task);
> > > > task_blocked_on(task) is not clear to me, the recipient of the
> > > > return is the only clue that hints at what the function does.
> > > 
> > > Well, this is more than confusing, it's the only user, all other users
> > > are task_blocked_on_lock(), and this causes the code not to compile.
> > 
> > Grr, yes.
> 
> Luckily you are not posting this to that grumpy IRQ maintainer. He'd
> shoot some frozen sharks your way if you sent him patches like this ;-)

Rightfully so. :)
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