linux-kernel - Re: [PATCH V3] rtmutex: ensure only the top waiter or higher priority task can take the lock and remove unrelated boosting

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Message-ID: <1294851934.26623.374.camel@gandalf.stny.rr.com>
Date:	Wed, 12 Jan 2011 12:05:34 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Lai Jiangshan <laijs@...fujitsu.com>
Cc:	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>,
	Darren Hart <dvhart@...ux.intel.com>,
	Namhyung Kim <namhyung@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH V3] rtmutex: ensure only the top waiter or higher
 priority task can take the lock and remove unrelated boosting

On Wed, 2011-01-12 at 12:04 -0500, Steven Rostedt wrote:
> On Wed, 2011-01-12 at 12:03 -0500, Steven Rostedt wrote:
> > On Thu, 2010-12-23 at 16:49 +0800, Lai Jiangshan wrote:
> > > In current rtmutex, the pending owner may be boosted by the tasks
> > > in the rtmutex's waitlist when the pending owner is deboosted
> > > or a task in the waitlist is boosted. This boosting is unrelated,
> > > because the pending owner does not really take the rtmutex.
> > > It is not reasonable.
> > 
> > Hi Lai,
> > 
> > Your patch looks like it is proving itself in -rt (after I fixed a bunch
> > of -rt stuff to get your stuff working ;).
> > 
> > Could you repost your patch with the following removed:
> 
> Oh, and you can add:
> 
> Acked-by: Steven Rostedt <rostedt@...dmis.org>
> 

Actually this would be more appropriate:

Reviewed-by: Steven Rostedt <rostedt@...dmis.org>

-- Steve


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