sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry (98eb401d) · Commits · 戴 / test

As Russell pointed out [1], this option is severely lacking in the documentation department, and figuring out if one has the required dependencies to benefit from turning it on is not straightforward. Make it non user-visible, and add a bit of help to it. While at it, make it depend on CPU_FREQ_THERMAL. [1]: https://lkml.kernel.org/r/20200603173150.GB1551@shell.armlinux.org.uk Signed-off-by:

Valentin Schneider <valentin.schneider@arm.com> Signed-off-by:

Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lkml.kernel.org/r/20200712165917.9168-3-valentin.schneider@arm.com

init/Kconfig

+14 −1

Original line number	Diff line number	Diff line
		@@ -492,8 +492,21 @@ config HAVE_SCHED_AVG_IRQ
		depends on SMP

		config SCHED_THERMAL_PRESSURE
		bool "Enable periodic averaging of thermal pressure"
		bool
		depends on SMP
		depends on CPU_FREQ_THERMAL
		help
		Select this option to enable thermal pressure accounting in the
		scheduler. Thermal pressure is the value conveyed to the scheduler
		that reflects the reduction in CPU compute capacity resulted from
		thermal throttling. Thermal throttling occurs when the performance of
		a CPU is capped due to high operating temperatures.

		If selected, the scheduler will be able to balance tasks accordingly,
		i.e. put less load on throttled CPUs than on non/less throttled ones.

		This requires the architecture to implement
		arch_set_thermal_pressure() and arch_get_thermal_pressure().

		config BSD_PROCESS_ACCT
		bool "BSD Process Accounting"

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