linux-kernel - Re: [PATCH] cpufreq: schedutil: Don't skip freq update when limits change

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Message-ID: <20190726032631.rflrl5wxgbphqxyf@vireshk-i7>
Date:   Fri, 26 Jul 2019 08:56:31 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Doug Smythies <dsmythies@...us.net>
Cc:     "'Rafael J. Wysocki'" <rafael@...nel.org>,
        'Rafael Wysocki' <rjw@...ysocki.net>,
        'Ingo Molnar' <mingo@...hat.com>,
        'Peter Zijlstra' <peterz@...radead.org>,
        'Linux PM' <linux-pm@...r.kernel.org>,
        'Vincent Guittot' <vincent.guittot@...aro.org>,
        'Joel Fernandes' <joel@...lfernandes.org>,
        "'v4 . 18+'" <stable@...r.kernel.org>,
        'Linux Kernel Mailing List' <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: schedutil: Don't skip freq update when limits
 change

On 25-07-19, 08:20, Doug Smythies wrote:
> I tried the patch ("patch2"). It did not fix the issue.
> 
> To summarize, all kernel 5.2 based, all intel_cpufreq driver and schedutil governor:
> 
> Test: Does a busy system respond to maximum CPU clock frequency reduction?
> 
> stock, unaltered: No.
> revert ecd2884291261e3fddbc7651ee11a20d596bb514: Yes
> viresh patch: No.
> fast_switch edit: No.

You tried this fast-switch thing with my patch applied, right ?

> viresh patch2: No.
> 
> References (and procedures used):
> https://marc.info/?l=linux-pm&m=156346478429147&w=2
> https://marc.info/?l=linux-kernel&m=156343125319461&w=2
> 
> ... Doug
> 

-- 
viresh