linux-kernel - Re: [ANNOUNCE] 3.2.9-rt17

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Message-ID: <alpine.LFD.2.02.1203091042040.2742@ionos>
Date:	Fri, 9 Mar 2012 11:23:05 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	Steven Rostedt <rostedt@...dmis.org>
cc:	Peter Zijlstra <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-rt-users <linux-rt-users@...r.kernel.org>
Subject: Re: [ANNOUNCE] 3.2.9-rt17

On Thu, 8 Mar 2012, Steven Rostedt wrote:
> On Fri, 2012-03-09 at 01:20 +0100, Thomas Gleixner wrote:
> > So yopu need to replace the trylock by try_deadlock() and boost the
> > lock owner w/o blocking on the lock. That means that you need some
> > other means to tell the lock owner that you are waiting for it w/o
> > actually waiting. 
> 
> Actually, you don't need to tell the lock owner you are waiting for it,
> you only need to make the lock itself have a priority, and the owner
> will inherit that priority as long as it holds the lock.

Hmm, that would actually work, though I'm not too enthusiastic about
sched_yield().

Thanks,

	tglx
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