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What: /sys/bus/pci/drivers/qla2xxx/.../devices/* | ||
Date: September 2009 | ||
Contact: QLogic Linux Driver <[email protected]> | ||
Description: qla2xxx-udev.sh currently looks for uevent CHANGE events to | ||
signal a firmware-dump has been generated by the driver and is | ||
ready for retrieval. | ||
Users: qla2xxx-udev.sh. Proposed changes should be mailed to | ||
[email protected] |
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@@ -4,7 +4,7 @@ Contact: Jerome Marchand <[email protected]> | |
Description: | ||
The /sys/block/<disk>/stat files displays the I/O | ||
statistics of disk <disk>. They contain 11 fields: | ||
1 - reads completed succesfully | ||
1 - reads completed successfully | ||
2 - reads merged | ||
3 - sectors read | ||
4 - time spent reading (ms) | ||
|
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@@ -21,25 +21,27 @@ Contact: Alan Stern <[email protected]> | |
Description: | ||
Each USB device directory will contain a file named | ||
power/level. This file holds a power-level setting for | ||
the device, one of "on", "auto", or "suspend". | ||
the device, either "on" or "auto". | ||
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"on" means that the device is not allowed to autosuspend, | ||
although normal suspends for system sleep will still | ||
be honored. "auto" means the device will autosuspend | ||
and autoresume in the usual manner, according to the | ||
capabilities of its driver. "suspend" means the device | ||
is forced into a suspended state and it will not autoresume | ||
in response to I/O requests. However remote-wakeup requests | ||
from the device may still be enabled (the remote-wakeup | ||
setting is controlled separately by the power/wakeup | ||
attribute). | ||
capabilities of its driver. | ||
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During normal use, devices should be left in the "auto" | ||
level. The other levels are meant for administrative uses. | ||
level. The "on" level is meant for administrative uses. | ||
If you want to suspend a device immediately but leave it | ||
free to wake up in response to I/O requests, you should | ||
write "0" to power/autosuspend. | ||
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Device not capable of proper suspend and resume should be | ||
left in the "on" level. Although the USB spec requires | ||
devices to support suspend/resume, many of them do not. | ||
In fact so many don't that by default, the USB core | ||
initializes all non-hub devices in the "on" level. Some | ||
drivers may change this setting when they are bound. | ||
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What: /sys/bus/usb/devices/.../power/persist | ||
Date: May 2007 | ||
KernelVersion: 2.6.23 | ||
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@@ -144,3 +146,16 @@ Description: | |
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Write a 1 to force the device to disconnect | ||
(equivalent to unplugging a wired USB device). | ||
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What: /sys/bus/usb/drivers/.../remove_id | ||
Date: November 2009 | ||
Contact: CHENG Renquan <[email protected]> | ||
Description: | ||
Writing a device ID to this file will remove an ID | ||
that was dynamically added via the new_id sysfs entry. | ||
The format for the device ID is: | ||
idVendor idProduct. After successfully | ||
removing an ID, the driver will no longer support the | ||
device. This is useful to ensure auto probing won't | ||
match the driver to the device. For example: | ||
# echo "046d c315" > /sys/bus/usb/drivers/foo/remove_id |
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@@ -23,3 +23,16 @@ Description: | |
Since this relates to security (specifically, the | ||
lifetime of PTKs and GTKs) it should not be changed | ||
from the default. | ||
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What: /sys/class/uwb_rc/uwbN/wusbhc/wusb_phy_rate | ||
Date: August 2009 | ||
KernelVersion: 2.6.32 | ||
Contact: David Vrabel <[email protected]> | ||
Description: | ||
The maximum PHY rate to use for all connected devices. | ||
This is only of limited use for testing and | ||
development as the hardware's automatic rate | ||
adaptation is better then this simple control. | ||
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Refer to [ECMA-368] section 10.3.1.1 for the value to | ||
use. |
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@@ -60,6 +60,19 @@ Description: | |
Users: hotplug memory remove tools | ||
https://w3.opensource.ibm.com/projects/powerpc-utils/ | ||
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What: /sys/devices/system/memoryX/nodeY | ||
Date: October 2009 | ||
Contact: Linux Memory Management list <[email protected]> | ||
Description: | ||
When CONFIG_NUMA is enabled, a symbolic link that | ||
points to the corresponding NUMA node directory. | ||
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For example, the following symbolic link is created for | ||
memory section 9 on node0: | ||
/sys/devices/system/memory/memory9/node0 -> ../../node/node0 | ||
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What: /sys/devices/system/node/nodeX/memoryY | ||
Date: September 2008 | ||
Contact: Gary Hade <[email protected]> | ||
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@@ -70,4 +83,3 @@ Description: | |
memory section directory. For example, the following symbolic | ||
link is created for memory section 9 on node0. | ||
/sys/devices/system/node/node0/memory9 -> ../../memory/memory9 | ||
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@@ -62,6 +62,35 @@ Description: CPU topology files that describe kernel limits related to | |
See Documentation/cputopology.txt for more information. | ||
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What: /sys/devices/system/cpu/probe | ||
/sys/devices/system/cpu/release | ||
Date: November 2009 | ||
Contact: Linux kernel mailing list <[email protected]> | ||
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. | ||
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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. | ||
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release: writes to this file dynamically remove a CPU from | ||
the system. Information writtento the file to remove CPU's | ||
is architecture specific. | ||
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What: /sys/devices/system/cpu/cpu#/node | ||
Date: October 2009 | ||
Contact: Linux memory management mailing list <[email protected]> | ||
Description: Discover NUMA node a CPU belongs to | ||
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When CONFIG_NUMA is enabled, a symbolic link that points | ||
to the corresponding NUMA node directory. | ||
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For example, the following symlink is created for cpu42 | ||
in NUMA node 2: | ||
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/sys/devices/system/cpu/cpu42/node2 -> ../../node/node2 | ||
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What: /sys/devices/system/cpu/cpu#/node | ||
Date: October 2009 | ||
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@@ -136,6 +165,24 @@ Description: Discover cpuidle policy and mechanism | |
See files in Documentation/cpuidle/ for more information. | ||
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What: /sys/devices/system/cpu/cpu#/cpufreq/* | ||
Date: pre-git history | ||
Contact: [email protected] | ||
Description: Discover and change clock speed of CPUs | ||
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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. | ||
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There are many knobs to tweak in this directory. | ||
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See files in Documentation/cpu-freq/ for more information. | ||
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In particular, read Documentation/cpu-freq/user-guide.txt | ||
to learn how to control the knobs. | ||
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What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X | ||
Date: August 2008 | ||
KernelVersion: 2.6.27 | ||
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