linux-kernel - Re: [PATCH v5 0/6] Initialise thermal framework and cpufreq earlier during boot

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Date:   Thu, 31 Oct 2019 10:42:03 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     Amit Kucheria <amit.kucheria@...aro.org>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        daniel.lezcano@...aro.org, viresh.kumar@...aro.org,
        sudeep.holla@....com, bjorn.andersson@...aro.org,
        edubezval@...il.com, agross@...nel.org, tdas@...eaurora.org,
        swboyd@...omium.org, ilina@...eaurora.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Amit Kucheria <amit.kucheria@...durent.com>,
        Ben Segall <bsegall@...gle.com>,
        Dietmar Eggemann <dietmar.eggemann@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Juri Lelli <juri.lelli@...hat.com>,
        Mel Gorman <mgorman@...e.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Vincent Guittot <vincent.guittot@...aro.org>
Cc:     linux-clk@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-pm@...r.kernel.org
Subject: Re: [PATCH v5 0/6] Initialise thermal framework and cpufreq earlier
 during boot

Hi,

Given that all the patches in this series have got the ACK from the
subsystem maintainers, I suppose we can take all the patches through
thermal tree, right?

thanks,
rui

On Mon, 2019-10-21 at 17:45 +0530, Amit Kucheria wrote:
> Changes since v4:
> - Collect Acks
> - Pick the US spelling for 'initialis^Hze' consistently.
> 
> Changes since v3:
> - Init schedutil governor earlier too
> - Simplified changes to thermal_init() error path
> - Collects Acks
> 
> Changes since v2:
> - Missed one patch when posting v2. Respinning.
> 
> Changes since v1:
> - Completely get rid of netlink support in the thermal framework.
> - This changes the early init patch to a single line - change to
>   core_initcall. Changed authorship of patch since it is nothing like
> the
>   original. Lina, let me know if you feel otherwise.
> - I've tested to make sure that the qcom-cpufreq-hw driver continues
> to
>   work correctly as a module so this won't impact Android's GKI
> plans.
> - Collected Acks
> 
> Device boot needs to be as fast as possible while keeping under the
> thermal
> envelope. Now that thermal framework is built-in to the kernel, we
> can
> initialize it earlier to enable thermal mitigation during boot.
> 
> We also need the cpufreq HW drivers to be initialised earlier to act
> as the
> cooling devices. This series only converts over the qcom-hw driver to
> initialize earlier but can be extended to other platforms as well.
> 
> Amit Kucheria (6):
>   thermal: Remove netlink support
>   thermal: Initialize thermal subsystem earlier
>   cpufreq: Initialize the governors in core_initcall
>   cpufreq: Initialize cpufreq-dt driver earlier
>   clk: qcom: Initialize clock drivers earlier
>   cpufreq: qcom-hw: Move driver initialization earlier
> 
>  .../driver-api/thermal/sysfs-api.rst          |  26 +----
>  drivers/clk/qcom/clk-rpmh.c                   |   2 +-
>  drivers/clk/qcom/gcc-qcs404.c                 |   2 +-
>  drivers/clk/qcom/gcc-sdm845.c                 |   2 +-
>  drivers/cpufreq/cpufreq-dt-platdev.c          |   2 +-
>  drivers/cpufreq/cpufreq_conservative.c        |   2 +-
>  drivers/cpufreq/cpufreq_ondemand.c            |   2 +-
>  drivers/cpufreq/cpufreq_performance.c         |   2 +-
>  drivers/cpufreq/cpufreq_powersave.c           |   2 +-
>  drivers/cpufreq/cpufreq_userspace.c           |   2 +-
>  drivers/cpufreq/qcom-cpufreq-hw.c             |   2 +-
>  drivers/thermal/thermal_core.c                | 103 +---------------
> --
>  include/linux/thermal.h                       |  11 --
>  kernel/sched/cpufreq_schedutil.c              |   2 +-
>  14 files changed, 19 insertions(+), 143 deletions(-)
>