[PATCH 3.15 46/84] intel_pstate: Update documentation of {max,min}_perf_pct sysfs files

Greg Kroah-Hartman
2014-07-15T23:36:28Z

From: Dirk Brandewie <dirk.j.brandewie@intel.com>

commit 41629a8233470325bfbb60377f555f9e8acc879f upstream.

Update documentation to make the interpretation of the values clearer

Link: https://bugzilla.kernel.org/show_bug.cgi?id=64251
Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
Documentation/cpu-freq/intel-pstate.txt | 7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

--- a/Documentation/cpu-freq/intel-pstate.txt
+++ b/Documentation/cpu-freq/intel-pstate.txt
@@ -15,10 +15,13 @@ New sysfs files for controlling P state
/sys/devices/system/cpu/intel_pstate/

max_perf_pct: limits the maximum P state that will be requested by
- the driver stated as a percentage of the available performance.
+ the driver stated as a percentage of the available performance. The
+ available (P states) performance may be reduced by the no_turbo
+ setting described below.

min_perf_pct: limits the minimum P state that will be requested by
- the driver stated as a percentage of the available performance.
+ the driver stated as a percentage of the max (non-turbo)
+ performance level.

no_turbo: limits the driver to selecting P states below the turbo
frequency range.