From 61cb5758d3c46bc1ba87694fefc0d9653613ce6b Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Wed, 5 Dec 2018 23:45:34 +0100 Subject: cpuidle: Add cpuidle.governor= command line parameter Add cpuidle.governor= command line parameter to allow the default cpuidle governor to be replaced. That is useful, for example, if someone running a tickful kernel wants to use the menu governor on it. Signed-off-by: Rafael J. Wysocki --- Documentation/admin-guide/kernel-parameters.txt | 3 +++ Documentation/admin-guide/pm/cpuidle.rst | 7 +++++++ 2 files changed, 10 insertions(+) (limited to 'Documentation/admin-guide') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 19f4423e70d9..60fb9913af48 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -674,6 +674,9 @@ cpuidle.off=1 [CPU_IDLE] disable the cpuidle sub-system + cpuidle.governor= + [CPU_IDLE] Name of the cpuidle governor to use. + cpufreq.off=1 [CPU_FREQ] disable the cpufreq sub-system diff --git a/Documentation/admin-guide/pm/cpuidle.rst b/Documentation/admin-guide/pm/cpuidle.rst index 80b4f26547ac..9a34484fd6e4 100644 --- a/Documentation/admin-guide/pm/cpuidle.rst +++ b/Documentation/admin-guide/pm/cpuidle.rst @@ -566,6 +566,13 @@ processors implementing the architecture (i.e. CPU instruction set) in question, however, so it is rather crude and not very energy-efficient. For this reason, it is not recommended for production use. +The ``cpuidle.governor=`` kernel command line switch allows the ``CPUIdle`` +governor to use to be specified. It has to be appended with a string matching +the name of an available governor (e.g. ``cpuidle.governor=menu``) and that +governor will be used instead of the default one. It is possible to force +the ``menu`` governor to be used on the systems that use the ``ladder`` governor +by default this way, for example. + The other kernel command line parameters controlling CPU idle time management described below are only relevant for the *x86* architecture and some of them affect Intel processors only. -- cgit v1.2.3