linux-kernel - Re: [PATCH 4/4][V2] ARM: timer-sp: Set dynamic irq affinity

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Date:	Mon, 11 Mar 2013 16:22:55 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Daniel Lezcano <daniel.lezcano@...aro.org>
Cc:	john.stultz@...aro.org, tglx@...utronix.de,
	viresh.kumar@...aro.org, jacob.jun.pan@...ux.intel.com,
	linux-arm-kernel@...ts.infradead.org, santosh.shilimkar@...com,
	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	linaro-kernel@...ts.linaro.org, patches@...aro.org,
	rickard.andersson@...ricsson.com, vincent.guittot@...aro.org,
	linus.walleij@...ricsson.com
Subject: Re: [PATCH 4/4][V2] ARM: timer-sp: Set dynamic irq affinity

On Fri, Mar 08, 2013 at 04:28:55PM +0100, Daniel Lezcano wrote:
> On 03/02/2013 11:10 AM, Daniel Lezcano wrote:
> > From: Viresh Kumar <viresh.kumar@...aro.org>
> > 
> > When a cpu goes to a deep idle state where its local timer is shutdown, it
> > notifies the time frame work to use the broadcast timer instead.
> > 
> > Unfortunately, the broadcast device could wake up any CPU, including an idle one
> > which is not concerned by the wake up at all.
> > 
> > This implies, in the worst case, an idle CPU will wake up to send an IPI to
> > another idle cpu.
> > 
> > This patch fixes this for ARM platforms using timer-sp, by setting
> > CLOCK_EVT_FEAT_DYNIRQ feature.
> > 
> > Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
> > ---
> 
> Hi Russell,
> 
> I asked Thomas if he could take this patch in its tree but it falls
> under your umbrella. Thomas agreed to take it if you ack this patch.
> 
> Is this patch acceptable for you ?

It's simple enough.

Acked-by: Russell King <rmk+kernel@....linux.org.uk>
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