From 7395683a2498c7000120cdee8e4fb0c632e5561b Mon Sep 17 00:00:00 2001 From: Hanjun Guo Date: Tue, 19 May 2020 14:25:24 +0800 Subject: Documentation: cpuidle: update the document Update the document after the remove of cpuidle_sysfs_switch. Signed-off-by: Hanjun Guo Reviewed-by: Doug Smythies Signed-off-by: Rafael J. Wysocki --- Documentation/admin-guide/pm/cpuidle.rst | 20 +++++++++----------- 1 file changed, 9 insertions(+), 11 deletions(-) (limited to 'Documentation/admin-guide') diff --git a/Documentation/admin-guide/pm/cpuidle.rst b/Documentation/admin-guide/pm/cpuidle.rst index 5605cc6f9560..a96a423e3779 100644 --- a/Documentation/admin-guide/pm/cpuidle.rst +++ b/Documentation/admin-guide/pm/cpuidle.rst @@ -159,17 +159,15 @@ governor uses that information depends on what algorithm is implemented by it and that is the primary reason for having more than one governor in the ``CPUIdle`` subsystem. -There are three ``CPUIdle`` governors available, ``menu``, `TEO `_ -and ``ladder``. Which of them is used by default depends on the configuration -of the kernel and in particular on whether or not the scheduler tick can be -`stopped by the idle loop `_. It is possible to change the -governor at run time if the ``cpuidle_sysfs_switch`` command line parameter has -been passed to the kernel, but that is not safe in general, so it should not be -done on production systems (that may change in the future, though). The name of -the ``CPUIdle`` governor currently used by the kernel can be read from the -:file:`current_governor_ro` (or :file:`current_governor` if -``cpuidle_sysfs_switch`` is present in the kernel command line) file under -:file:`/sys/devices/system/cpu/cpuidle/` in ``sysfs``. +There are four ``CPUIdle`` governors available, ``menu``, `TEO `_, +``ladder`` and ``haltpoll``. Which of them is used by default depends on the +configuration of the kernel and in particular on whether or not the scheduler +tick can be `stopped by the idle loop `_. Available +governors can be read from the :file:`available_governors`, and the governor +can be changed at runtime. The name of the ``CPUIdle`` governor currently +used by the kernel can be read from the :file:`current_governor_ro` or +:file:`current_governor` file under :file:`/sys/devices/system/cpu/cpuidle/` +in ``sysfs``. Which ``CPUIdle`` driver is used, on the other hand, usually depends on the platform the kernel is running on, but there are platforms with more than one -- cgit v1.2.3-73-gaa49b