On Sun, 12 Jul 2020 at 18:59, Valentin Schneider
[off-list ref] 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(-)

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2.27.0