linux-kernel - Re: [PATCH] rtmutex: ensure only the top waiter or higher priority task can take the lock and reduce unrelated boosting

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Date:	Thu, 16 Dec 2010 22:30:34 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	Darren Hart <dvhart@...ux.intel.com>,
	Lai Jiangshan <eag0628@...il.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Dave Young <hidave.darkstar@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] rtmutex: ensure only the top waiter or higher priority
 task can take the lock and reduce unrelated boosting

On Thu, 2010-12-16 at 22:17 -0500, Steven Rostedt wrote:
> On Fri, 2010-12-17 at 11:10 +0800, Lai Jiangshan wrote:
> > On 12/17/2010 04:33 AM, Darren Hart wrote:
> 
> > I also try to port it to -rt. Steven, have you ported it to -rt?
> 
> I'm porting it now. -rt does a a bit to the rtmutex.c code, and I spent
> a bit of time cleaning it up. I finally got your patch to compile, and
> now I'm debugging it ;-)
> 
> I'm hoping to have it ready to post tomorrow.

Update: I just successfully booted a port of your patch. I'll keep it
running over night and post it tomorrow morning (if it doesn't crash).

/me kicks off a bunch of dbenches

-- Steve


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