linux-kernel - Re: [PATCH 1/9] workqueue: perform cpu down operations from low priority cpu

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Message-ID: <20120720215835.GB6823@google.com>
Date:	Fri, 20 Jul 2012 14:58:35 -0700
From:	Tejun Heo <tj@...nel.org>
To:	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org, torvalds@...ux-foundation.org,
	peterz@...radead.org, tglx@...utronix.de, linux-pm@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH 1/9] workqueue: perform cpu down operations from low
 priority cpu_notifier()

Hello, Paul.

On Fri, Jul 20, 2012 at 02:52:07PM -0700, Paul E. McKenney wrote:
> > Fix it by using different priorities for up and down notifiers - high
> > priority for up operations and low priority for down operations.
> 
> Cool!!!
> 
> This certainly provides another data point in favor of running down
> notifiers in the opposite order from up notifiers.  ;-)

Yeah, I was thinking about that.  I don't think converting CPU
notifiers would take a lot of work in terms of both auditing and
converting.  We only have several priorities.

> This series passes light rcutorture/hotplug testing, will be testing
> it more.

Great!

-- 
tejun
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