On Wed, Jun 03, 2020 at 07:00:26PM +0100, Valentin Schneider wrote:
>
> On 03/06/20 18:31, Russell King - ARM Linux admin wrote:
> > Hi,
> >
> > A new kernel configuration option ("SCHED_THERMAL_PRESSURE") was
> > recently added, but has no help text. This is most unhelpful when
> > trying to configure the kernel, since one does not know what the
> > effect of answering yes or no to this option would be.
> >
> > Please supply a proper help text when adding core kernel options
> > so that people can make an informed decision when answering the
> > prompt, rather than just guessing.
> >
>
> Right; does the below look good enough?
It's a start. I'm still wondering whether I should answer yes or no
for the platforms I'm building for.
So far, all I've found is:
arch/arm/include/asm/topology.h:#define arch_scale_thermal_pressure
topology_get_thermal_pressure
which really doesn't tell me anything about this. So I'm still in
the dark.
I guess topology_get_thermal_pressure is provided by something in
drivers/ which will be conditional on some driver or something.
>
> ---
> diff --git a/init/Kconfig b/init/Kconfig
> index 74a5ac65644f..f40cf852d00a 100644
> --- a/init/Kconfig
> +++ b/init/Kconfig
> @@ -441,6 +441,10 @@ config HAVE_SCHED_AVG_IRQ
> config SCHED_THERMAL_PRESSURE
> bool "Enable periodic averaging of thermal pressure"
> depends on SMP
> + help
> + This option allows the scheduler to be aware of CPU thermal throttling
> + (i.e. thermal pressure), providing arch_scale_thermal_pressure() is
> + implemented.
>
> config BSD_PROCESS_ACCT
> bool "BSD Process Accounting"
> ---
>
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
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