From: Santosh Shilimkar <santosh.shilimkar@ti.com>
To: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Daniel Lezcano <daniel.lezcano@linaro.org>,
<john.stultz@linaro.org>, <tglx@linutronix.de>,
<jacob.jun.pan@linux.intel.com>,
<linux-arm-kernel@lists.infradead.org>,
<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linaro-kernel@lists.linaro.org>, <patches@linaro.org>,
<linus.walleij@stericsson.com>
Subject: Re: [PATCH 4/4] ARM: timer-sp: Set dynamic irq affinity
Date: Wed, 27 Feb 2013 10:34:21 +0530 [thread overview]
Message-ID: <512D93D5.3010501@ti.com> (raw)
In-Reply-To: <CAKohpomj1mueL9NETb1xfXTpnKnXCtb9Secu3q5vZTS9dJd0Vg@mail.gmail.com>
On Wednesday 27 February 2013 10:29 AM, Viresh Kumar wrote:
> On 27 February 2013 10:26, Santosh Shilimkar <santosh.shilimkar@ti.com> wrote:
>> On Wednesday 27 February 2013 03:47 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.
>>>
>> Broad-cast device will only open the CPU for which the timer IRQ
>> affined to. And infact with subject series the affinity also is
>> updated for the CPU which owns the last timer expiry event.
>>
>> What am I missing here ?
>
> Dynamic affinity will work only if the following flag is set for a
> clock_event_device: CLOCK_EVT_FEAT_DYNIRQ, otherwise wakeup
> would happen on the cpu to which static affinity was set to.
>
I should have looked at the patches in order first :)
Sorry for the noise.
Regards,
Santosh
next prev parent reply other threads:[~2013-02-27 5:03 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-26 22:17 [PATCH 0/4] time: dynamic irq affinity Daniel Lezcano
2013-02-26 22:17 ` [PATCH 1/4] time : pass broadcast parameter Daniel Lezcano
2013-02-27 5:09 ` Santosh Shilimkar
2013-02-26 22:17 ` [PATCH 2/4] time : set broadcast irq affinity Daniel Lezcano
2013-02-27 5:33 ` Santosh Shilimkar
2013-02-26 22:17 ` [PATCH 3/4] ARM: nomadik: add dynamic irq flag to the timer Daniel Lezcano
2013-03-01 1:13 ` Linus Walleij
2013-03-01 8:56 ` Vincent Guittot
2013-03-01 13:28 ` Rickard Andersson
2013-02-26 22:17 ` [PATCH 4/4] ARM: timer-sp: Set dynamic irq affinity Daniel Lezcano
2013-02-27 4:56 ` Santosh Shilimkar
2013-02-27 4:59 ` Viresh Kumar
2013-02-27 5:04 ` Santosh Shilimkar [this message]
2013-02-27 6:00 ` [PATCH 0/4] time: " Santosh Shilimkar
2013-02-27 10:47 ` Russell King - ARM Linux
2013-02-27 22:00 ` Thomas Gleixner
2013-03-10 17:33 ` Santosh Shilimkar
2013-03-10 18:22 ` Daniel Lezcano
2013-03-11 3:24 ` Santosh Shilimkar
2013-03-11 8:40 ` Daniel Lezcano
2013-03-11 9:12 ` Santosh Shilimkar
2013-03-11 9:28 ` Rickard Andersson
2013-03-11 10:29 ` Santosh Shilimkar
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