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-rw-r--r--Documentation/ABI/testing/sysfs-devices-system-cpu47
1 files changed, 47 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-devices-system-cpu b/Documentation/ABI/testing/sysfs-devices-system-cpu
index a703b9e9aeb9..84a710f87c64 100644
--- a/Documentation/ABI/testing/sysfs-devices-system-cpu
+++ b/Documentation/ABI/testing/sysfs-devices-system-cpu
@@ -62,6 +62,35 @@ Description: CPU topology files that describe kernel limits related to
See Documentation/cputopology.txt for more information.
+What: /sys/devices/system/cpu/probe
+ /sys/devices/system/cpu/release
+Date: November 2009
+Contact: Linux kernel mailing list <linux-kernel@vger.kernel.org>
+Description: Dynamic addition and removal of CPU's. This is not hotplug
+ removal, this is meant complete removal/addition of the CPU
+ from the system.
+
+ probe: writes to this file will dynamically add a CPU to the
+ system. Information written to the file to add CPU's is
+ architecture specific.
+
+ release: writes to this file dynamically remove a CPU from
+ the system. Information writtento the file to remove CPU's
+ is architecture specific.
+
+What: /sys/devices/system/cpu/cpu#/node
+Date: October 2009
+Contact: Linux memory management mailing list <linux-mm@kvack.org>
+Description: Discover NUMA node a CPU belongs to
+
+ When CONFIG_NUMA is enabled, a symbolic link that points
+ to the corresponding NUMA node directory.
+
+ For example, the following symlink is created for cpu42
+ in NUMA node 2:
+
+ /sys/devices/system/cpu/cpu42/node2 -> ../../node/node2
+
What: /sys/devices/system/cpu/cpu#/node
Date: October 2009
@@ -136,6 +165,24 @@ Description: Discover cpuidle policy and mechanism
See files in Documentation/cpuidle/ for more information.
+What: /sys/devices/system/cpu/cpu#/cpufreq/*
+Date: pre-git history
+Contact: cpufreq@vger.kernel.org
+Description: Discover and change clock speed of CPUs
+
+ Clock scaling allows you to change the clock speed of the
+ CPUs on the fly. This is a nice method to save battery
+ power, because the lower the clock speed, the less power
+ the CPU consumes.
+
+ There are many knobs to tweak in this directory.
+
+ See files in Documentation/cpu-freq/ for more information.
+
+ In particular, read Documentation/cpu-freq/user-guide.txt
+ to learn how to control the knobs.
+
+
What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
Date: August 2008
KernelVersion: 2.6.27