linux-kernel - Re: [PATCH v3 0/3] Add support for frequency invariance to AMD EPYC Zen2

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Date:   Thu, 12 Nov 2020 19:33:10 +0100
From:   Giovanni Gherdovich <ggherdovich@...e.cz>
To:     Borislav Petkov <bp@...en8.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Len Brown <lenb@...nel.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>
Cc:     Jon Grimm <Jon.Grimm@....com>,
        Nathan Fontenot <Nathan.Fontenot@....com>,
        Yazen Ghannam <Yazen.Ghannam@....com>,
        Thomas Lendacky <Thomas.Lendacky@....com>,
        Mel Gorman <mgorman@...hsingularity.net>,
        Pu Wen <puwen@...on.cn>,
        Viresh Kumar <viresh.kumar@...aro.org>,
        Juri Lelli <juri.lelli@...hat.com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Doug Smythies <dsmythies@...us.net>, x86@...nel.org,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-acpi@...r.kernel.org
Subject: Re: [PATCH v3 0/3] Add support for frequency invariance to AMD EPYC
 Zen2

On Tue, 2020-11-10 at 21:05 +0100, Giovanni Gherdovich wrote:
> v2 at https://lore.kernel.org/lkml/20201110183054.15883-1-ggherdovich@suse.cz/
> 
> Changes wrt v2:
> 
> - "code golf" on the function function init_freq_invariance_cppc().
>   Make better use of the "secondary" argument to init_freq_invariance(),
>   which was introduced at b56e7d45e807 ("x86, sched: Don't enable static key
>   when starting secondary CPUs") to deal with CPU hotplug.

The Intel 0-day bot reported a build error due to not guarding a part
of the patch with CONFIG_ACPI_CPPC_LIB. I've sent a v4 to fix that.

v4 at https://lore.kernel.org/lkml/20201112182614.10700-1-ggherdovich@suse.cz/
is now the most up-to-date version, ignore this one.


Thanks,
Giovanni