linux-kernel - Re: [PATCH 2/4] stop_machine: reimplement using cpuhog

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Message-ID: <20100308083204.1300b97a@infradead.org>
Date:	Mon, 8 Mar 2010 08:32:04 -0800
From:	Arjan van de Ven <arjan@...radead.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	linux-kernel@...r.kernel.org, rusty@...tcorp.com.au,
	sivanich@....com, heiko.carstens@...ibm.com,
	torvalds@...ux-foundation.org, mingo@...e.hu, peterz@...radead.org,
	dipankar@...ibm.com, josh@...edesktop.org,
	paulmck@...ux.vnet.ibm.com, oleg@...hat.com,
	akpm@...ux-foundation.org, Tejun Heo <tj@...nel.org>
Subject: Re: [PATCH 2/4] stop_machine: reimplement using cpuhog

On Tue,  9 Mar 2010 00:53:21 +0900
Tejun Heo <tj@...nel.org> wrote:

> Reimplement stop_machine using cpuhog.  As cpuhogs are guaranteed to
> be available for all online cpus, stop_machine_create/destroy() are no
> longer necessary and removed.

question;
stop_machine pretty much also stops interrupts (it has to, at least for
the users of stop_machine).. do cpu_hogs do this too?

(if they don't, cpu_hogs aren't safe for some of the users of
stop_machine, like code patching etc)


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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