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-rw-r--r--Documentation/admin-guide/pm/intel_pstate.rst8
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/admin-guide/pm/intel_pstate.rst b/Documentation/admin-guide/pm/intel_pstate.rst
index 7adef969ffee..5072e7064d13 100644
--- a/Documentation/admin-guide/pm/intel_pstate.rst
+++ b/Documentation/admin-guide/pm/intel_pstate.rst
@@ -123,7 +123,9 @@ Energy-Performance Bias (EPB) knob (otherwise), which means that the processor's
internal P-state selection logic is expected to focus entirely on performance.
This will override the EPP/EPB setting coming from the ``sysfs`` interface
-(see `Energy vs Performance Hints`_ below).
+(see `Energy vs Performance Hints`_ below). Moreover, any attempts to change
+the EPP/EPB to a value different from 0 ("performance") via ``sysfs`` in this
+configuration will be rejected.
Also, in this configuration the range of P-states available to the processor's
internal P-state selection logic is always restricted to the upper boundary
@@ -564,8 +566,8 @@ Energy-Performance Preference (EPP) knob (if supported) or its
Energy-Performance Bias (EPB) knob. It is also possible to write a positive
integer value between 0 to 255, if the EPP feature is present. If the EPP
feature is not present, writing integer value to this attribute is not
-supported. In this case, user can use
- "/sys/devices/system/cpu/cpu*/power/energy_perf_bias" interface.
+supported. In this case, user can use the
+"/sys/devices/system/cpu/cpu*/power/energy_perf_bias" interface.
[Note that tasks may by migrated from one CPU to another by the scheduler's
load-balancing algorithm and if different energy vs performance hints are