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From:   Vincent Guittot <vincent.guittot@linaro.org>
Date:   Mon, 13 Jul 2020 14:03:06 +0200
Message-ID: <CAKfTPtCWEb=Dh12GSyYSG6nsqSciyDmcev62ntexXuFDtO_+ng@mail.gmail.com>
Subject: Re: [PATCH v2 0/3] sched, arch_topology: Thermal pressure
 configuration cleanup
To:     Valentin Schneider <valentin.schneider@arm.com>
Cc:     linux-kernel <linux-kernel@vger.kernel.org>,
        LAK <linux-arm-kernel@lists.infradead.org>,
        "open list:THERMAL" <linux-pm@vger.kernel.org>,
        Russell King <linux@armlinux.org.uk>,
        Thara Gopinath <thara.gopinath@linaro.org>,
        Sudeep Holla <sudeep.holla@arm.com>,
        Amit Daniel Kachhap <amit.kachhap@gmail.com>,
        Daniel Lezcano <daniel.lezcano@linaro.org>,
        Viresh Kumar <viresh.kumar@linaro.org>,
        Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Juri Lelli <juri.lelli@redhat.com>,
        Dietmar Eggemann <dietmar.eggemann@arm.com>
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On Sun, 12 Jul 2020 at 18:59, Valentin Schneider
<valentin.schneider@arm.com> wrote:
>
> Hi folks,
>
> This stems from this thread [1] on the list. TL;DR: the thermal pressure config
> has no helpful documentation, and figuring out if the right dependencies are in
> place is not easy for a regular user.
>
> The current landscape also paints an odd picture: arch_set_thermal_pressure() is
> hardcoded in sched/core.c, and is *not* architecture-definable, while
> arch_get_thermal_pressure() is. Patch 1 is tackling this, the rest is Kconfig
> stuff.
>
> Cheers,
> Valentin
>
> [1]: https://lkml.kernel.org/r/20200603173150.GB1551@shell.armlinux.org.uk
>
> Revisions
> =========
>
> v1 -> v2
> --------
>
> o Remove cpufreq_cooling.c weak function; use #define stub in sched/topology.h
>   (Vincent)

Looks good to me.

Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>

> o Hinge arm SCHED_THERMAL_PRESSURE selection on ARM_CPU_TOPOLOGY
>
> Valentin Schneider (3):
>   arch_topology, sched/core: Cleanup thermal pressure definition
>   sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry
>   arm, arm64: Select CONFIG_SCHED_THERMAL_PRESSURE
>
>  arch/arm/Kconfig                  |  1 +
>  arch/arm/include/asm/topology.h   |  3 ++-
>  arch/arm64/Kconfig                |  1 +
>  arch/arm64/include/asm/topology.h |  3 ++-
>  drivers/base/arch_topology.c      | 11 +++++++++++
>  include/linux/arch_topology.h     |  4 ++--
>  include/linux/sched/topology.h    |  7 +++++++
>  init/Kconfig                      | 15 ++++++++++++++-
>  kernel/sched/core.c               | 11 -----------
>  9 files changed, 40 insertions(+), 16 deletions(-)
>
> --
> 2.27.0
>