linux-kernel - Re: [PATCH v7 00/13] Implement AMD Pstate EPP Driver

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Date:   Thu, 8 Dec 2022 12:36:23 +0100
From:   "Rafael J. Wysocki" <rafael@...nel.org>
To:     Perry Yuan <perry.yuan@....com>
Cc:     rafael.j.wysocki@...el.com, Mario.Limonciello@....com,
        ray.huang@....com, viresh.kumar@...aro.org, Deepak.Sharma@....com,
        Nathan.Fontenot@....com, Alexander.Deucher@....com,
        Shimmer.Huang@....com, Xiaojian.Du@....com, Li.Meng@....com,
        wyes.karny@....com, linux-pm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 00/13] Implement AMD Pstate EPP Driver

Hi,

On Thu, Dec 8, 2022 at 12:19 PM Perry Yuan <perry.yuan@....com> wrote:
>
> Hi all,
>
> This patchset implements one new AMD CPU frequency driver
> `amd-pstate-epp` instance for better performance and power control.
> CPPC has a parameter called energy preference performance (EPP).
> The EPP is used in the CCLK DPM controller to drive the frequency that a core
> is going to operate during short periods of activity.
> EPP values will be utilized for different OS profiles (balanced, performance, power savings).

I honestly don't think that this work is ready for 6.2.

The number of patches in the series seems to change frequently and
there are active discussions around specific patches.

Accordingly, I will not consider applying it until 6.2-rc1 is out.

Thanks!