linux-kernel - Re: [PATCH v4 0/5] Refactor thermal pressure update to avoid code duplication

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Date:   Tue, 23 Nov 2021 09:11:15 +0000
From:   Lukasz Luba <lukasz.luba@....com>
To:     Viresh Kumar <viresh.kumar@...aro.org>
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, steev@...i.org,
        sudeep.holla@....com, will@...nel.org, catalin.marinas@....com,
        linux@...linux.org.uk, gregkh@...uxfoundation.org,
        rafael@...nel.org, amitk@...nel.org, daniel.lezcano@...aro.org,
        amit.kachhap@...il.com, thara.gopinath@...aro.org,
        bjorn.andersson@...aro.org, agross@...nel.org
Subject: Re: [PATCH v4 0/5] Refactor thermal pressure update to avoid code
 duplication

Hi Viresh,

On 11/11/21 3:15 AM, Viresh Kumar wrote:
> On 09-11-21, 19:57, Lukasz Luba wrote:
>> Hi all,
>>
>> This patch set v4 aims to refactor the thermal pressure update
>> code. There are already two clients which do similar thing:
>> convert the capped frequency value into the capacity of
>> affected CPU and call the 'set' function to store the
>> reduced capacity into the per-cpu variable.
>> There might be more than two of these users. In near future
>> it will be scmi-cpufreq driver, which receives notification
>> from FW about reduced frequency due to thermal. Other vendors
>> might follow. Let's avoid code duplication and potential
>> conversion bugs. Move the conversion code into the arch_topology.c
>> where the capacity calculation setup code and thermal pressure sit.
>>
>> Apart from that $subject patches, there is one patch (3/5) which fixes
>> issue in qcom-cpufreq-hw.c when the thermal pressure is not
>> updated for offline CPUs. It's similar fix that has been merged
>> recently for cpufreq_cooling.c:
>> 2ad8ccc17d1e4270cf65a3f2
>>
>> The patch 4/5 fixes also qcom-cpufreq-hw.c driver code which did
>> the translation from frequency to capacity wrongly when there
>> was a boost frequency available and stored in 'policy->cpuinfo.max_freq'.
> 
> LGTM. I will apply this in a few days so people get time to Ack/Review
> the patches.
> 

Thara has reviewed the patches. Could you take the patch set into
your tree, please?