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Merge branches 'atags', 'cache-l2x0', 'clkdev', 'fixes', 'integrator', 'misc', 'opcodes' and 'syscall' into for-linus
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@@ -210,3 +210,15 @@ Users:
|
||||
firmware assigned instance number of the PCI
|
||||
device that can help in understanding the firmware
|
||||
intended order of the PCI device.
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||||
|
||||
What: /sys/bus/pci/devices/.../d3cold_allowed
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||||
Date: July 2012
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||||
Contact: Huang Ying <ying.huang@intel.com>
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||||
Description:
|
||||
d3cold_allowed is bit to control whether the corresponding PCI
|
||||
device can be put into D3Cold state. If it is cleared, the
|
||||
device will never be put into D3Cold state. If it is set, the
|
||||
device may be put into D3Cold state if other requirements are
|
||||
satisfied too. Reading this attribute will show the current
|
||||
value of d3cold_allowed bit. Writing this attribute will set
|
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the value of d3cold_allowed bit.
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|
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@@ -5,4 +5,15 @@ Contact: "Ike Panhc <ike.pan@canonical.com>"
|
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Description:
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Control the power of camera module. 1 means on, 0 means off.
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||||
|
||||
What: /sys/devices/platform/ideapad/fan_mode
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Date: June 2012
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KernelVersion: 3.6
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Contact: "Maxim Mikityanskiy <maxtram95@gmail.com>"
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Description:
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Change fan mode
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There are four available modes:
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* 0 -> Super Silent Mode
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* 1 -> Standard Mode
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||||
* 2 -> Dust Cleaning
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||||
* 4 -> Efficient Thermal Dissipation Mode
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||||
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@@ -224,8 +224,8 @@ all your transactions.
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</para>
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||||
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<para>
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Then at umount time , in your put_super() (2.4) or write_super() (2.5)
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you can then call journal_destroy() to clean up your in-core journal object.
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Then at umount time , in your put_super() you can then call journal_destroy()
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to clean up your in-core journal object.
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</para>
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<para>
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||||
@@ -125,7 +125,7 @@ the structure refers to a radio tuner the
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||||
<constant>V4L2_TUNER_CAP_NORM</constant> flags can't be used.</para>
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<para>If multiple frequency bands are supported, then
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<structfield>capability</structfield> is the union of all
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<structfield>capability></structfield> fields of each &v4l2-frequency-band;.
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<structfield>capability</structfield> fields of each &v4l2-frequency-band;.
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</para></entry>
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</row>
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<row>
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@@ -3,15 +3,21 @@
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biodoc.txt
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- Notes on the Generic Block Layer Rewrite in Linux 2.5
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capability.txt
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- Generic Block Device Capability (/sys/block/<disk>/capability)
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- Generic Block Device Capability (/sys/block/<device>/capability)
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cfq-iosched.txt
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- CFQ IO scheduler tunables
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||||
data-integrity.txt
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||||
- Block data integrity
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deadline-iosched.txt
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- Deadline IO scheduler tunables
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ioprio.txt
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- Block io priorities (in CFQ scheduler)
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queue-sysfs.txt
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- Queue's sysfs entries
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request.txt
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- The members of struct request (in include/linux/blkdev.h)
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stat.txt
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- Block layer statistics in /sys/block/<dev>/stat
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- Block layer statistics in /sys/block/<device>/stat
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||||
switching-sched.txt
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- Switching I/O schedulers at runtime
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writeback_cache_control.txt
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@@ -1,3 +1,14 @@
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CFQ (Complete Fairness Queueing)
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===============================
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The main aim of CFQ scheduler is to provide a fair allocation of the disk
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I/O bandwidth for all the processes which requests an I/O operation.
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|
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CFQ maintains the per process queue for the processes which request I/O
|
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operation(syncronous requests). In case of asynchronous requests, all the
|
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requests from all the processes are batched together according to their
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process's I/O priority.
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|
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CFQ ioscheduler tunables
|
||||
========================
|
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|
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@@ -25,6 +36,72 @@ there are multiple spindles behind single LUN (Host based hardware RAID
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||||
controller or for storage arrays), setting slice_idle=0 might end up in better
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throughput and acceptable latencies.
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|
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back_seek_max
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-------------
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This specifies, given in Kbytes, the maximum "distance" for backward seeking.
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The distance is the amount of space from the current head location to the
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sectors that are backward in terms of distance.
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This parameter allows the scheduler to anticipate requests in the "backward"
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direction and consider them as being the "next" if they are within this
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distance from the current head location.
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|
||||
back_seek_penalty
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-----------------
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This parameter is used to compute the cost of backward seeking. If the
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backward distance of request is just 1/back_seek_penalty from a "front"
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request, then the seeking cost of two requests is considered equivalent.
|
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So scheduler will not bias toward one or the other request (otherwise scheduler
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will bias toward front request). Default value of back_seek_penalty is 2.
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fifo_expire_async
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-----------------
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This parameter is used to set the timeout of asynchronous requests. Default
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value of this is 248ms.
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|
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fifo_expire_sync
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----------------
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This parameter is used to set the timeout of synchronous requests. Default
|
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value of this is 124ms. In case to favor synchronous requests over asynchronous
|
||||
one, this value should be decreased relative to fifo_expire_async.
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||||
|
||||
slice_async
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-----------
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This parameter is same as of slice_sync but for asynchronous queue. The
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default value is 40ms.
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slice_async_rq
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||||
--------------
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||||
This parameter is used to limit the dispatching of asynchronous request to
|
||||
device request queue in queue's slice time. The maximum number of request that
|
||||
are allowed to be dispatched also depends upon the io priority. Default value
|
||||
for this is 2.
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||||
|
||||
slice_sync
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||||
----------
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||||
When a queue is selected for execution, the queues IO requests are only
|
||||
executed for a certain amount of time(time_slice) before switching to another
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queue. This parameter is used to calculate the time slice of synchronous
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queue.
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time_slice is computed using the below equation:-
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time_slice = slice_sync + (slice_sync/5 * (4 - prio)). To increase the
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time_slice of synchronous queue, increase the value of slice_sync. Default
|
||||
value is 100ms.
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||||
|
||||
quantum
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||||
-------
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||||
This specifies the number of request dispatched to the device queue. In a
|
||||
queue's time slice, a request will not be dispatched if the number of request
|
||||
in the device exceeds this parameter. This parameter is used for synchronous
|
||||
request.
|
||||
|
||||
In case of storage with several disk, this setting can limit the parallel
|
||||
processing of request. Therefore, increasing the value can imporve the
|
||||
performace although this can cause the latency of some I/O to increase due
|
||||
to more number of requests.
|
||||
|
||||
CFQ IOPS Mode for group scheduling
|
||||
===================================
|
||||
Basic CFQ design is to provide priority based time slices. Higher priority
|
||||
|
||||
@@ -9,20 +9,71 @@ These files are the ones found in the /sys/block/xxx/queue/ directory.
|
||||
Files denoted with a RO postfix are readonly and the RW postfix means
|
||||
read-write.
|
||||
|
||||
add_random (RW)
|
||||
----------------
|
||||
This file allows to trun off the disk entropy contribution. Default
|
||||
value of this file is '1'(on).
|
||||
|
||||
discard_granularity (RO)
|
||||
-----------------------
|
||||
This shows the size of internal allocation of the device in bytes, if
|
||||
reported by the device. A value of '0' means device does not support
|
||||
the discard functionality.
|
||||
|
||||
discard_max_bytes (RO)
|
||||
----------------------
|
||||
Devices that support discard functionality may have internal limits on
|
||||
the number of bytes that can be trimmed or unmapped in a single operation.
|
||||
The discard_max_bytes parameter is set by the device driver to the maximum
|
||||
number of bytes that can be discarded in a single operation. Discard
|
||||
requests issued to the device must not exceed this limit. A discard_max_bytes
|
||||
value of 0 means that the device does not support discard functionality.
|
||||
|
||||
discard_zeroes_data (RO)
|
||||
------------------------
|
||||
When read, this file will show if the discarded block are zeroed by the
|
||||
device or not. If its value is '1' the blocks are zeroed otherwise not.
|
||||
|
||||
hw_sector_size (RO)
|
||||
-------------------
|
||||
This is the hardware sector size of the device, in bytes.
|
||||
|
||||
iostats (RW)
|
||||
-------------
|
||||
This file is used to control (on/off) the iostats accounting of the
|
||||
disk.
|
||||
|
||||
logical_block_size (RO)
|
||||
-----------------------
|
||||
This is the logcal block size of the device, in bytes.
|
||||
|
||||
max_hw_sectors_kb (RO)
|
||||
----------------------
|
||||
This is the maximum number of kilobytes supported in a single data transfer.
|
||||
|
||||
max_integrity_segments (RO)
|
||||
---------------------------
|
||||
When read, this file shows the max limit of integrity segments as
|
||||
set by block layer which a hardware controller can handle.
|
||||
|
||||
max_sectors_kb (RW)
|
||||
-------------------
|
||||
This is the maximum number of kilobytes that the block layer will allow
|
||||
for a filesystem request. Must be smaller than or equal to the maximum
|
||||
size allowed by the hardware.
|
||||
|
||||
max_segments (RO)
|
||||
-----------------
|
||||
Maximum number of segments of the device.
|
||||
|
||||
max_segment_size (RO)
|
||||
---------------------
|
||||
Maximum segment size of the device.
|
||||
|
||||
minimum_io_size (RO)
|
||||
--------------------
|
||||
This is the smallest preferred io size reported by the device.
|
||||
|
||||
nomerges (RW)
|
||||
-------------
|
||||
This enables the user to disable the lookup logic involved with IO
|
||||
@@ -45,11 +96,24 @@ per-block-cgroup request pool. IOW, if there are N block cgroups,
|
||||
each request queue may have upto N request pools, each independently
|
||||
regulated by nr_requests.
|
||||
|
||||
optimal_io_size (RO)
|
||||
--------------------
|
||||
This is the optimal io size reported by the device.
|
||||
|
||||
physical_block_size (RO)
|
||||
------------------------
|
||||
This is the physical block size of device, in bytes.
|
||||
|
||||
read_ahead_kb (RW)
|
||||
------------------
|
||||
Maximum number of kilobytes to read-ahead for filesystems on this block
|
||||
device.
|
||||
|
||||
rotational (RW)
|
||||
---------------
|
||||
This file is used to stat if the device is of rotational type or
|
||||
non-rotational type.
|
||||
|
||||
rq_affinity (RW)
|
||||
----------------
|
||||
If this option is '1', the block layer will migrate request completions to the
|
||||
|
||||
@@ -1,3 +1,15 @@
|
||||
ARM Integrator/AP (Application Platform) and Integrator/CP (Compact Platform)
|
||||
-----------------------------------------------------------------------------
|
||||
ARM's oldest Linux-supported platform with connectors for different core
|
||||
tiles of ARMv4, ARMv5 and ARMv6 type.
|
||||
|
||||
Required properties (in root node):
|
||||
compatible = "arm,integrator-ap"; /* Application Platform */
|
||||
compatible = "arm,integrator-cp"; /* Compact Platform */
|
||||
|
||||
FPGA type interrupt controllers, see the versatile-fpga-irq binding doc.
|
||||
|
||||
|
||||
ARM Versatile Application and Platform Baseboards
|
||||
-------------------------------------------------
|
||||
ARM's development hardware platform with connectors for customizable
|
||||
|
||||
@@ -0,0 +1,31 @@
|
||||
* ARM Versatile FPGA interrupt controller
|
||||
|
||||
One or more FPGA IRQ controllers can be synthesized in an ARM reference board
|
||||
such as the Integrator or Versatile family. The output of these different
|
||||
controllers are OR:ed together and fed to the CPU tile's IRQ input. Each
|
||||
instance can handle up to 32 interrupts.
|
||||
|
||||
Required properties:
|
||||
- compatible: "arm,versatile-fpga-irq"
|
||||
- interrupt-controller: Identifies the node as an interrupt controller
|
||||
- #interrupt-cells: The number of cells to define the interrupts. Must be 1
|
||||
as the FPGA IRQ controller has no configuration options for interrupt
|
||||
sources. The cell is a u32 and defines the interrupt number.
|
||||
- reg: The register bank for the FPGA interrupt controller.
|
||||
- clear-mask: a u32 number representing the mask written to clear all IRQs
|
||||
on the controller at boot for example.
|
||||
- valid-mask: a u32 number representing a bit mask determining which of
|
||||
the interrupts are valid. Unconnected/unused lines are set to 0, and
|
||||
the system till not make it possible for devices to request these
|
||||
interrupts.
|
||||
|
||||
Example:
|
||||
|
||||
pic: pic@14000000 {
|
||||
compatible = "arm,versatile-fpga-irq";
|
||||
#interrupt-cells = <1>;
|
||||
interrupt-controller;
|
||||
reg = <0x14000000 0x100>;
|
||||
clear-mask = <0xffffffff>;
|
||||
valid-mask = <0x003fffff>;
|
||||
};
|
||||
@@ -10,8 +10,8 @@ Required properties:
|
||||
- compatible : Should be "fsl,<chip>-esdhc"
|
||||
|
||||
Optional properties:
|
||||
- fsl,cd-internal : Indicate to use controller internal card detection
|
||||
- fsl,wp-internal : Indicate to use controller internal write protection
|
||||
- fsl,cd-controller : Indicate to use controller internal card detection
|
||||
- fsl,wp-controller : Indicate to use controller internal write protection
|
||||
|
||||
Examples:
|
||||
|
||||
@@ -19,8 +19,8 @@ esdhc@70004000 {
|
||||
compatible = "fsl,imx51-esdhc";
|
||||
reg = <0x70004000 0x4000>;
|
||||
interrupts = <1>;
|
||||
fsl,cd-internal;
|
||||
fsl,wp-internal;
|
||||
fsl,cd-controller;
|
||||
fsl,wp-controller;
|
||||
};
|
||||
|
||||
esdhc@70008000 {
|
||||
|
||||
@@ -9,9 +9,9 @@ Required properties:
|
||||
- regulators: list of regulators provided by this controller, must have
|
||||
property "regulator-compatible" to match their hardware counterparts:
|
||||
sm[0-2], ldo[0-9] and ldo_rtc
|
||||
- sm0-supply: The input supply for the SM0.
|
||||
- sm1-supply: The input supply for the SM1.
|
||||
- sm2-supply: The input supply for the SM2.
|
||||
- vin-sm0-supply: The input supply for the SM0.
|
||||
- vin-sm1-supply: The input supply for the SM1.
|
||||
- vin-sm2-supply: The input supply for the SM2.
|
||||
- vinldo01-supply: The input supply for the LDO1 and LDO2
|
||||
- vinldo23-supply: The input supply for the LDO2 and LDO3
|
||||
- vinldo4-supply: The input supply for the LDO4
|
||||
@@ -30,9 +30,9 @@ Example:
|
||||
#gpio-cells = <2>;
|
||||
gpio-controller;
|
||||
|
||||
sm0-supply = <&some_reg>;
|
||||
sm1-supply = <&some_reg>;
|
||||
sm2-supply = <&some_reg>;
|
||||
vin-sm0-supply = <&some_reg>;
|
||||
vin-sm1-supply = <&some_reg>;
|
||||
vin-sm2-supply = <&some_reg>;
|
||||
vinldo01-supply = <...>;
|
||||
vinldo23-supply = <...>;
|
||||
vinldo4-supply = <...>;
|
||||
|
||||
@@ -579,7 +579,7 @@ Why: KVM tracepoints provide mostly equivalent information in a much more
|
||||
----------------------------
|
||||
|
||||
What: at91-mci driver ("CONFIG_MMC_AT91")
|
||||
When: 3.7
|
||||
When: 3.8
|
||||
Why: There are two mci drivers: at91-mci and atmel-mci. The PDC support
|
||||
was added to atmel-mci as a first step to support more chips.
|
||||
Then at91-mci was kept only for old IP versions (on at91rm9200 and
|
||||
|
||||
@@ -114,7 +114,6 @@ prototypes:
|
||||
int (*drop_inode) (struct inode *);
|
||||
void (*evict_inode) (struct inode *);
|
||||
void (*put_super) (struct super_block *);
|
||||
void (*write_super) (struct super_block *);
|
||||
int (*sync_fs)(struct super_block *sb, int wait);
|
||||
int (*freeze_fs) (struct super_block *);
|
||||
int (*unfreeze_fs) (struct super_block *);
|
||||
@@ -136,7 +135,6 @@ write_inode:
|
||||
drop_inode: !!!inode->i_lock!!!
|
||||
evict_inode:
|
||||
put_super: write
|
||||
write_super: read
|
||||
sync_fs: read
|
||||
freeze_fs: write
|
||||
unfreeze_fs: write
|
||||
|
||||
@@ -94,9 +94,8 @@ protected.
|
||||
---
|
||||
[mandatory]
|
||||
|
||||
BKL is also moved from around sb operations. ->write_super() Is now called
|
||||
without BKL held. BKL should have been shifted into individual fs sb_op
|
||||
functions. If you don't need it, remove it.
|
||||
BKL is also moved from around sb operations. BKL should have been shifted into
|
||||
individual fs sb_op functions. If you don't need it, remove it.
|
||||
|
||||
---
|
||||
[informational]
|
||||
|
||||
@@ -137,6 +137,17 @@ errors=panic|continue|remount-ro
|
||||
without doing anything or remount the partition in
|
||||
read-only mode (default behavior).
|
||||
|
||||
discard -- If set, issues discard/TRIM commands to the block
|
||||
device when blocks are freed. This is useful for SSD devices
|
||||
and sparse/thinly-provisoned LUNs.
|
||||
|
||||
nfs -- This option maintains an index (cache) of directory
|
||||
inodes by i_logstart which is used by the nfs-related code to
|
||||
improve look-ups.
|
||||
|
||||
Enable this only if you want to export the FAT filesystem
|
||||
over NFS
|
||||
|
||||
<bool>: 0,1,yes,no,true,false
|
||||
|
||||
TODO
|
||||
|
||||
@@ -216,7 +216,6 @@ struct super_operations {
|
||||
void (*drop_inode) (struct inode *);
|
||||
void (*delete_inode) (struct inode *);
|
||||
void (*put_super) (struct super_block *);
|
||||
void (*write_super) (struct super_block *);
|
||||
int (*sync_fs)(struct super_block *sb, int wait);
|
||||
int (*freeze_fs) (struct super_block *);
|
||||
int (*unfreeze_fs) (struct super_block *);
|
||||
@@ -273,9 +272,6 @@ or bottom half).
|
||||
put_super: called when the VFS wishes to free the superblock
|
||||
(i.e. unmount). This is called with the superblock lock held
|
||||
|
||||
write_super: called when the VFS superblock needs to be written to
|
||||
disc. This method is optional
|
||||
|
||||
sync_fs: called when VFS is writing out all dirty data associated with
|
||||
a superblock. The second parameter indicates whether the method
|
||||
should wait until the write out has been completed. Optional.
|
||||
|
||||
@@ -21,6 +21,7 @@ Supported adapters:
|
||||
* Intel DH89xxCC (PCH)
|
||||
* Intel Panther Point (PCH)
|
||||
* Intel Lynx Point (PCH)
|
||||
* Intel Lynx Point-LP (PCH)
|
||||
Datasheets: Publicly available at the Intel website
|
||||
|
||||
On Intel Patsburg and later chipsets, both the normal host SMBus controller
|
||||
|
||||
@@ -262,9 +262,9 @@ MINIMUM_BATTERY_MINUTES=10
|
||||
|
||||
#
|
||||
# Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
|
||||
# exceeded, the kernel will wake pdflush which will then reduce the amount
|
||||
# of dirty memory to dirty_background_ratio. Set this nice and low, so once
|
||||
# some writeout has commenced, we do a lot of it.
|
||||
# exceeded, the kernel will wake flusher threads which will then reduce the
|
||||
# amount of dirty memory to dirty_background_ratio. Set this nice and low,
|
||||
# so once some writeout has commenced, we do a lot of it.
|
||||
#
|
||||
#DIRTY_BACKGROUND_RATIO=5
|
||||
|
||||
@@ -384,9 +384,9 @@ CPU_MAXFREQ=${CPU_MAXFREQ:-'slowest'}
|
||||
|
||||
#
|
||||
# Allowed dirty background ratio, in percent. Once DIRTY_RATIO has been
|
||||
# exceeded, the kernel will wake pdflush which will then reduce the amount
|
||||
# of dirty memory to dirty_background_ratio. Set this nice and low, so once
|
||||
# some writeout has commenced, we do a lot of it.
|
||||
# exceeded, the kernel will wake flusher threads which will then reduce the
|
||||
# amount of dirty memory to dirty_background_ratio. Set this nice and low,
|
||||
# so once some writeout has commenced, we do a lot of it.
|
||||
#
|
||||
DIRTY_BACKGROUND_RATIO=${DIRTY_BACKGROUND_RATIO:-'5'}
|
||||
|
||||
|
||||
@@ -51,8 +51,23 @@ Built-in netconsole starts immediately after the TCP stack is
|
||||
initialized and attempts to bring up the supplied dev at the supplied
|
||||
address.
|
||||
|
||||
The remote host can run either 'netcat -u -l -p <port>',
|
||||
'nc -l -u <port>' or syslogd.
|
||||
The remote host has several options to receive the kernel messages,
|
||||
for example:
|
||||
|
||||
1) syslogd
|
||||
|
||||
2) netcat
|
||||
|
||||
On distributions using a BSD-based netcat version (e.g. Fedora,
|
||||
openSUSE and Ubuntu) the listening port must be specified without
|
||||
the -p switch:
|
||||
|
||||
'nc -u -l -p <port>' / 'nc -u -l <port>' or
|
||||
'netcat -u -l -p <port>' / 'netcat -u -l <port>'
|
||||
|
||||
3) socat
|
||||
|
||||
'socat udp-recv:<port> -'
|
||||
|
||||
Dynamic reconfiguration:
|
||||
========================
|
||||
|
||||
@@ -840,9 +840,9 @@ static unsigned long i2c_pin_configs[] = {
|
||||
|
||||
static struct pinctrl_map __initdata mapping[] = {
|
||||
PIN_MAP_MUX_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", "i2c0"),
|
||||
PIN_MAP_MUX_CONFIGS_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", i2c_grp_configs),
|
||||
PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0scl", i2c_pin_configs),
|
||||
PIN_MAP_MUX_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0sda", i2c_pin_configs),
|
||||
PIN_MAP_CONFIGS_GROUP("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0", i2c_grp_configs),
|
||||
PIN_MAP_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0scl", i2c_pin_configs),
|
||||
PIN_MAP_CONFIGS_PIN("foo-i2c.0", PINCTRL_STATE_DEFAULT, "pinctrl-foo", "i2c0sda", i2c_pin_configs),
|
||||
};
|
||||
|
||||
Finally, some devices expect the mapping table to contain certain specific
|
||||
|
||||
Some files were not shown because too many files have changed in this diff Show More
Reference in New Issue
Block a user