linux-kernel - Re: [PATCH v4 0/5] ARM: topology: set the capacity of each cores for big.LITTLE

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Message-ID: <CAKfTPtC0BcidJ2ga9c2fdWjrEsfXH48QtSnjv0YOCv7-k3K-Ug@mail.gmail.com>
Date:	Tue, 10 Jul 2012 14:35:25 +0200
From:	Vincent Guittot <vincent.guittot@...aro.org>
To:	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Russell King - ARM Linux <linux@....linux.org.uk>
Cc:	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	linaro-dev@...ts.linaro.org, devicetree-discuss@...ts.ozlabs.org,
	grant.likely@...retlab.ca, rob.herring@...xeda.com,
	yong.zhang0@...il.com, namhyung@...nel.org,
	jean.pihet@...oldbits.com, mingo@...nel.org,
	Russell King <rmk@....linux.org.uk>
Subject: Re: [PATCH v4 0/5] ARM: topology: set the capacity of each cores for big.LITTLE

On 10 July 2012 13:27, Peter Zijlstra <a.p.zijlstra@...llo.nl> wrote:
> On Mon, 2012-07-09 at 11:27 +0200, Vincent Guittot wrote:
>> This patchset creates an arch_scale_freq_power function for ARM, which is used
>> to set the relative capacity of each core of a big.LITTLE system. It also removes
>> the broken power estimation of x86.
>>
>> Modification since v3:
>>  - Add comments
>>  - Add optimization for SMP system
>>  - Ensure that capacity of a CPU will be at most 1
>>
>> Modification since v2:
>>  - set_power_scale function becomes static
>>  - Rework loop in update_siblings_masks
>>  - Remove useless code in parse_dt_topology
>>
>> Modification since v1:
>>  - Add and update explanation about the use of the table and the range of the value
>>  - Remove the use of NR_CPUS and use nr_cpu_ids instead
>>  - Remove broken power estimation of x86
>>
>> Peter Zijlstra (1):
>>   sched, x86: Remove broken power estimation
>
> Note that this patch already made its way into tip as commit
> bcae21d6e793a7047d38abc9ac0946c53733c1dd so it might be best to base
> whatever tree this is supposed to fo into on something that includes
> that.
>

yes

>> Vincent Guittot (4):
>>   ARM: topology: Add arch_scale_freq_power function
>>   ARM: topology: factorize the update of sibling masks
>>   ARM: topology: Update cpu_power according to DT information
>>   sched: cpu_power: enable ARCH_POWER
>
> How would you like to proceed with these patches, I'm fine with them
> going through the ARM tree..

May be the last one which enable ARCH_POWER should also go into tip ?

>
> In which case:
>
> Acked-by: Peter Zijlstra <a.p.zijlstra@...llo.nl>
>
> Ingo, Russell, any other preferences?

I'm going to push the patches related to ARM into Russell's patch system

Vincent
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