bsdacct: fix uid/gid misreporting

[safe/jmp/linux-2.6] / Documentation / cpu-freq / user-guide.txt

diff --git a/Documentation/cpu-freq/user-guide.txt b/Documentation/cpu-freq/user-guide.txt
index e3443dd..04f6b32 100644 (file)
--- a/Documentation/cpu-freq/user-guide.txt
+++ b/Documentation/cpu-freq/user-guide.txt
@@ -31,7 +31,6 @@ Contents:
 
 3. How to change the CPU cpufreq policy and/or speed
 3.1 Preferred interface: sysfs
-3.2 Deprecated interfaces
 
 
 
@@ -152,6 +151,18 @@ cpuinfo_min_freq :         this file shows the minimum operating
                                frequency the processor can run at(in kHz) 
 cpuinfo_max_freq :             this file shows the maximum operating
                                frequency the processor can run at(in kHz) 
+cpuinfo_transition_latency     The time it takes on this CPU to
+                               switch between two frequencies in nano
+                               seconds. If unknown or known to be
+                               that high that the driver does not
+                               work with the ondemand governor, -1
+                               (CPUFREQ_ETERNAL) will be returned.
+                               Using this information can be useful
+                               to choose an appropriate polling
+                               frequency for a kernel governor or
+                               userspace daemon. Make sure to not
+                               switch the frequency too often
+                               resulting in performance loss.
 scaling_driver :               this file shows what cpufreq driver is
                                used to set the frequency on this CPU
 
@@ -165,7 +176,9 @@ scaling_governor,           and by "echoing" the name of another
                                work on some specific architectures or
                                processors.
 
-cpuinfo_cur_freq :             Current speed of the CPU, in KHz.
+cpuinfo_cur_freq :             Current frequency of the CPU as obtained from
+                               the hardware, in KHz. This is the frequency
+                               the CPU actually runs at.
 
 scaling_available_frequencies : List of available frequencies, in KHz.
 
@@ -185,7 +198,21 @@ related_cpus :                     List of CPUs that need some sort of frequency
 
 scaling_driver :               Hardware driver for cpufreq.
 
-scaling_cur_freq :             Current frequency of the CPU, in KHz.
+scaling_cur_freq :             Current frequency of the CPU as determined by
+                               the governor and cpufreq core, in KHz. This is
+                               the frequency the kernel thinks the CPU runs
+                               at.
+
+bios_limit :                   If the BIOS tells the OS to limit a CPU to
+                               lower frequencies, the user can read out the
+                               maximum available frequency from this file.
+                               This typically can happen through (often not
+                               intended) BIOS settings, restrictions
+                               triggered through a service processor or other
+                               BIOS/HW based implementations.
+                               This does not cover thermal ACPI limitations
+                               which can be detected through the generic
+                               thermal driver.
 
 If you have selected the "userspace" governor which allows you to
 set the CPU operating frequency to a specific value, you can read out
@@ -195,19 +222,3 @@ scaling_setspeed.          By "echoing" a new frequency into this
                                you can change the speed of the CPU,
                                but only within the limits of
                                scaling_min_freq and scaling_max_freq.
-                               
-
-3.2 Deprecated Interfaces
--------------------------
-
-Depending on your kernel configuration, you might find the following 
-cpufreq-related files:
-/proc/cpufreq
-/proc/sys/cpu/*/speed
-/proc/sys/cpu/*/speed-min
-/proc/sys/cpu/*/speed-max
-
-These are files for deprecated interfaces to cpufreq, which offer far
-less functionality. Because of this, these interfaces aren't described
-here.
-