linux-kernel - Re: [PATCH/RFC] timer: fix deadlock on cpu hotplug

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Message-ID: <1285147362.2275.896.camel@laptop>
Date:	Wed, 22 Sep 2010 11:22:42 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Tejun Heo <tj@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH/RFC] timer: fix deadlock on cpu hotplug

On Wed, 2010-09-22 at 10:37 +0200, Heiko Carstens wrote:
> > I've wanted to pull the whole migration thread out from SCHED_FIFO for a
> > while. Doing that is probably the easiest thing.
> 
> Something like th 

No that makes it a SCHED_OTHER task, and will indeed result in a wedged
system very quickly.

The idea was to move it to a class of its own above SCHED_FIFO.

I'll try and get something done, but I'm heading out to LinuxCon.JP
soon.
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