From: Russell King - ARM Linux <linux@arm.linux.org.uk>
To: Daniel Lezcano <daniel.lezcano@linaro.org>
Cc: john.stultz@linaro.org, tglx@linutronix.de,
viresh.kumar@linaro.org, jacob.jun.pan@linux.intel.com,
linux-arm-kernel@lists.infradead.org, santosh.shilimkar@ti.com,
linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
linaro-kernel@lists.linaro.org, patches@linaro.org,
rickard.andersson@stericsson.com, vincent.guittot@linaro.org,
linus.walleij@stericsson.com
Subject: Re: [PATCH 4/4][V2] ARM: timer-sp: Set dynamic irq affinity
Date: Mon, 11 Mar 2013 16:22:55 +0000 [thread overview]
Message-ID: <20130311162255.GI4977@n2100.arm.linux.org.uk> (raw)
In-Reply-To: <513A03B7.7000004@linaro.org>
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@linaro.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@linaro.org>
> > Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.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@arm.linux.org.uk>
next prev parent reply other threads:[~2013-03-11 16:29 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-02 10:10 [PATCH 0/4][V2] time: dynamic irq affinity Daniel Lezcano
2013-03-02 10:10 ` [PATCH 1/4][V2] time : pass broadcast parameter Daniel Lezcano
2013-03-02 10:10 ` [PATCH 2/4][V2] time : set broadcast irq affinity Daniel Lezcano
2013-03-05 20:40 ` Thomas Gleixner
2013-03-06 9:27 ` Daniel Lezcano
2013-03-06 9:48 ` Thomas Gleixner
2013-03-06 12:35 ` Daniel Lezcano
2013-03-08 4:38 ` Daniel Lezcano
2013-03-08 7:20 ` Thomas Gleixner
2013-03-11 21:00 ` Arnd Bergmann
2013-03-02 10:10 ` [PATCH 3/4][V2] ARM: nomadik: add dynamic irq flag to the timer Daniel Lezcano
2013-03-02 10:10 ` [PATCH 4/4][V2] ARM: timer-sp: Set dynamic irq affinity Daniel Lezcano
2013-03-08 15:28 ` Daniel Lezcano
2013-03-11 16:22 ` Russell King - ARM Linux [this message]
2013-03-08 15:17 ` [PATCH 3/4][V2] ARM: nomadik: add dynamic irq flag to the timer Daniel Lezcano
2013-03-08 16:03 ` Thomas Gleixner
2013-03-19 11:42 ` Daniel Lezcano
2013-03-12 11:38 ` Linus Walleij
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