[PATCH 2/3] sched: Cleanup SCHED_THERMAL_PRESSURE setup
From: Valentin Schneider <hidden>
Date: 2020-06-14 01:10:29
Also in:
linux-pm, lkml
Subsystem:
the rest · Maintainer:
Linus Torvalds
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 <redacted> --- init/Kconfig | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/init/Kconfig b/init/Kconfig
index 74a5ac65644f..052c9f4531c2 100644
--- a/init/Kconfig
+++ b/init/Kconfig@@ -439,8 +439,21 @@ 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"
--
2.27.0
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