path: root/Documentation/cpu-freq
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authorStratos Karafotis <>2013-03-05 22:06:29 +0000
committerRafael J. Wysocki <>2013-04-01 01:11:35 +0200
commit7af1c0568d33339318c6710381921a3a3d40eebb (patch)
tree4ae1c0bf763b140695e8efa0174e8453f9986ca7 /Documentation/cpu-freq
parent9366d84052e7c5b2eca804c08cfcd00b490f4de2 (diff)
cpufreq: conservative: Fix sampling_down_factor functionality
sampling_down_factor tunable is unused since commit 8e677ce83bf41ba9c74e5b6d9ee60b07d4e5ed93 (4 years ago). This patch restores the original functionality and documents the tunable. Signed-off-by: Stratos Karafotis <> Acked-by: Viresh Kumar <> Signed-off-by: Rafael J. Wysocki <>
Diffstat (limited to 'Documentation/cpu-freq')
1 files changed, 6 insertions, 0 deletions
diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt
index c7a2eb8450c2..4dfed30b7fda 100644
--- a/Documentation/cpu-freq/governors.txt
+++ b/Documentation/cpu-freq/governors.txt
@@ -191,6 +191,12 @@ governor but for the opposite direction. For example when set to its
default value of '20' it means that if the CPU usage needs to be below
20% between samples to have the frequency decreased.
+sampling_down_factor: similar functionality as in "ondemand" governor.
+But in "conservative", it controls the rate at which the kernel makes
+a decision on when to decrease the frequency while running in any
+speed. Load for frequency increase is still evaluated every
+sampling rate.
3. The Governor Interface in the CPUfreq Core