linux-kernel - Re: [ANNOUNCE] 3.14-rt1

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Message-ID: <1398748869.5514.81.camel@marge.simpson.net>
Date:	Tue, 29 Apr 2014 07:21:09 +0200
From:	Mike Galbraith <umgwanakikbuti@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Nicholas Mc Guire <der.herr@...r.at>,
	Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
	linux-rt-users <linux-rt-users@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	John Kacur <jkacur@...hat.com>
Subject: Re: [ANNOUNCE] 3.14-rt1

On Mon, 2014-04-28 at 16:37 +0200, Mike Galbraith wrote: 

> > Seems that migrate_disable() must be called before taking the lock as
> > it is done in every other location.
> 
> And for tasklist_lock, seems you also MUST do that prior to trylock as
> well, else you'll run afoul of the hotplug beast.

Bah.  Futzing with dmesg while stress script is running is either a very
bad idea, or a very good test.  Both virgin 3.10-rt and 3.12-rt with new
bugs squashed will deadlock.

Too bad I kept on testing, I liked the notion that hotplug was solid ;-)

-Mike

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