The following commit has been merged into the sched/core branch of tip: Commit-ID: 98eb401d09301d8a38c31cc8851ba95ac9385c8f Gitweb: https://git.kernel.org/tip/98eb401d09301d8a38c31cc8851ba95ac9385c8f Author: Valentin Schneider <valentin.schneider@xxxxxxx> AuthorDate: Sun, 12 Jul 2020 17:59:16 +01:00 Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx> CommitterDate: Wed, 22 Jul 2020 10:22:06 +02:00 sched: Cleanup SCHED_THERMAL_PRESSURE kconfig entry 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@xxxxxxxxxxxxxxxxxxxxx Signed-off-by: Valentin Schneider <valentin.schneider@xxxxxxx> Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> Link: https://lkml.kernel.org/r/20200712165917.9168-3-valentin.schneider@xxxxxxx --- init/Kconfig | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-) diff --git a/init/Kconfig b/init/Kconfig index 0498af5..0a97d85 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -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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