Re: v5.7: new core kernel option missing help text

[Valentin Schneider]

On 04/06/20 01:48, Thara Gopinath wrote:
> Hi Russel/Valentin
>
> The feature itself like Valentin explained below allows scheduler to be
> aware of cpu capacity reduced due to thermal throttling.
> arch_set_thermal_pressure feeds the capped capacity to the scheduler and
> hence the feature makes sense only if arch_set_thermal_pressure is
> implemented. Having said that arch_set_thermal_pressure is implemented
> in arch_topology driver for arm and arm64 platforms. But the feature
> itself is not bound to arm/arm64 platforms. So it would make it wrong to
> add a "depends on (ARM || ARM64) option."
>
> I agree with Vincent that allowing user to choose this option is
> probably not the best. IMO, this should be enabled by default in arm64
> defconfig considering both GENERIC_ARCH_TOPOLOGY and CPU_FREQ_THERMAL
> are enabled by default.

Right, I had skimmed over that but it probably does make more sense not
to bother users with it.

> So if it is acceptable three things to be done are:
> 1. Add the help text.
> 2. Don't allow SCHED_THERMAL_PRESSURE configurable by user
> 3. Enable it by default in arm64 defconfig

... and arm as well, I suppose?