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 a703b9e9aeb..84a710f87c6 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