linux-kernel - Re: [PATCH V2 3/3] workqueue: Schedule work on non-idle cpu instead of current one

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Message-ID: <20120930085455.GJ10383@mtj.dyndns.org>
Date:	Sun, 30 Sep 2012 17:54:55 +0900
From:	Tejun Heo <tj@...nel.org>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	linux-kernel@...r.kernel.org, pjt@...gle.com,
	paul.mckenney@...aro.org, tglx@...utronix.de,
	suresh.b.siddha@...el.com, venki@...gle.com, mingo@...hat.com,
	peterz@...radead.org, robin.randhawa@....com,
	Steve.Bannister@....com, Arvind.Chauhan@....com,
	amit.kucheria@...aro.org, vincent.guittot@...aro.org,
	linaro-dev@...ts.linaro.org, patches@...aro.org
Subject: Re: [PATCH V2 3/3] workqueue: Schedule work on non-idle cpu instead
 of current one

Hello, Viresh.

On Thu, Sep 27, 2012 at 02:34:05PM +0530, Viresh Kumar wrote:
> - A cpu has programmed a timer and is IDLE now.
> - CPU gets into interrupt handler due to timer and queues a work. As the CPU is
>   currently IDLE, we can queue this work to some other CPU.

I'm still a bit confused, if the CPU is already running the IRQ
handler, the CPU is not idle by definition.  What am I missing here?

Thanks.

-- 
tejun
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