diff options
Diffstat (limited to 'drivers/cpufreq/Kconfig')
| -rw-r--r-- | drivers/cpufreq/Kconfig | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index 1947088..7e07d94 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -109,6 +109,19 @@ config CPU_FREQ_DEFAULT_GOV_INTERACTIVE loading your cpufreq low-level hardware driver, using the 'interactive' governor for latency-sensitive workloads. + +config CPU_FREQ_DEFAULT_GOV_HOTPLUG + bool "hotplug" + select CPU_FREQ_GOV_HOTPLUG + select CPU_FREQ_GOV_PERFORMANCE + help + Use the CPUFreq governor 'hotplug' as default. This allows you + to get a full dynamic frequency capable system with CPU + hotplug support by simply loading your cpufreq low-level + hardware driver. Be aware that not all cpufreq drivers + support the hotplug governor. If unsure have a look at + the help section of the driver. Fallback governor will be the + performance governor. endchoice config CPU_FREQ_GOV_PERFORMANCE @@ -211,5 +224,25 @@ depends on X86 source "drivers/cpufreq/Kconfig.x86" endmenu +config CPU_FREQ_GOV_HOTPLUG + tristate "'hotplug' cpufreq governor" + depends on CPU_FREQ && NO_HZ && HOTPLUG_CPU + help + 'hotplug' - this driver mimics the frequency scaling behavior + in 'ondemand', but with several key differences. First is + that frequency transitions use the CPUFreq table directly, + instead of incrementing in a percentage of the maximum + available frequency. Second 'hotplug' will offline auxillary + CPUs when the system is idle, and online those CPUs once the + system becomes busy again. This last feature is needed for + architectures which transition to low power states when only + the "master" CPU is online, or for thermally constrained + devices. + + If you don't have one of these architectures or devices, use + 'ondemand' instead. + + If in doubt, say N. + endif endmenu |