Re: [PATCH v2 1/3] ACPI: processor: perflib: Use the "no limit" frequency QoS

[Pratyush Yadav]

Hi Rafael,

On Thu, Dec 29 2022, Rafael J. Wysocki wrote:

> On Thu, Dec 29, 2022 at 1:58 PM Pratyush Yadav <ptyadav@xxxxxxxxx> wrote:
>>
>> Hi Rafael,
>>
>> On Wed, Dec 28 2022, Rafael J. Wysocki wrote:
>> > From: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>> >
>> > When _PPC returns 0, it means that the CPU frequency is not limited by
>> > the platform firmware, so make acpi_processor_get_platform_limit()
>> > update the frequency QoS request used by it to "no limit" in that case.
>> >
>> > This addresses a problem with limiting CPU frequency artificially on
>> > some systems after CPU offline/online to the frequency that corresponds
>> > to the first entry in the _PSS return package.
>> >
>> > Reported-by: Pratyush Yadav <ptyadav@xxxxxxxxx>
>> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
>> > ---
[...]
>>
>> One small thing I noticed: in acpi_processor_ppc_init() "no limit" value
>> is set to INT_MAX and here it is set to FREQ_QOS_MAX_DEFAULT_VALUE. Both
>> should evaluate to the same value but I think it would be nice if the
>> same thing is used in both places. Perhaps you can fix that up when
>> applying?
>
> Yes, I'll do that.

Following up on this series. I do not see it queued anywhere in the
linux-pm [0] tree. I would like to have this in the v6.3 merge window if
possible.

[0] https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git/

-- 
Regards,
Pratyush Yadav



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