i. No write-back cache. Keeping requests ordered is enough.
ii. Write-back cache but no flush operation. There's no way to
-gurantee physical-medium commit order. This kind of devices can't to
+guarantee physical-medium commit order. This kind of devices can't to
I/O barriers.
iii. Write-back cache and flush operation but no FUA (forced unit
read_expire (in ms)
-----------
-The goal of the deadline io scheduler is to attempt to guarentee a start
+The goal of the deadline io scheduler is to attempt to guarantee a start
service time for a request. As we focus mainly on read latencies, this is
tunable. When a read request first enters the io scheduler, it is assigned
a deadline that is the current time + the read_expire value in units of
This gives the amount of time spent in each of the frequencies supported by
this CPU. The cat output will have "<frequency> <time>" pair in each line, which
will mean this CPU spent <time> usertime units of time at <frequency>. Output
-will have one line for each of the supported freuencies. usertime units here
+will have one line for each of the supported frequencies. usertime units here
is 10mS (similar to other time exported in /proc).
--------------------------------------------------------------------------------
2.4 Ondemand
------------
-The CPUfreq govenor "ondemand" sets the CPU depending on the
+The CPUfreq governor "ondemand" sets the CPU depending on the
current usage. To do this the CPU must have the capability to
switch the frequency very quickly. There are a number of sysfs file
accessible parameters:
In the packet update mechanism, the user neesd to create a new file having
packets of data arranged back to back. It can be done as follows
The user creates packets header, gets the chunk of the BIOS image and
-placs it next to the packetheader; now, the packetheader + BIOS image chunk
-added to geather should match the specified packet_size. This makes one
+places it next to the packetheader; now, the packetheader + BIOS image chunk
+added together should match the specified packet_size. This makes one
packet, the user needs to create more such packets out of the entire BIOS
image file and then arrange all these packets back to back in to one single
file.
- video-buf: capture helper module for the saa7146_vv driver. This
one is responsible to handle capture buffers.
- - dvb-ttpci: The main driver for AV7110 based, full-featued
+ - dvb-ttpci: The main driver for AV7110 based, full-featured
DVB-S/C/T cards
eof
supported options including some explanation.
The desired display mode can be specified using the keyword "mode" with
-a parameter in one of the follwing formats:
+a parameter in one of the following formats:
- XxYxDepth or
- XxY-Depth or
- XxY-Depth@Rate or
for module : insmod sstfb.o option1=value1 option2=value2 ...
in kernel : video=sstfb:option1,option2:value2,option3 ...
- sstfb supports the folowing options :
+ sstfb supports the following options :
Module Kernel Description
---------------------------
What: USB driver API moves to EXPORT_SYMBOL_GPL
-When: Febuary 2008
+When: February 2008
Files: include/linux/usb.h, drivers/usb/core/driver.c
Why: The USB subsystem has changed a lot over time, and it has been
possible to create userspace USB drivers using usbfs/libusb/gadgetfs
/ibox
The second SPU to CPU communication mailbox. This file is similar to
the first mailbox file, but can be read in blocking I/O mode, and the
- poll familiy of system calls can be used to wait for it. The possible
+ poll family of system calls can be used to wait for it. The possible
operations on an open ibox file are:
read(2)
In this case the locking is done on a bdev object that is known to be a
partition.
-The validator treats a lock that is taken in such a nested fasion as a
+The validator treats a lock that is taken in such a nested fashion as a
separate (sub)class for the purposes of validation.
Note: When changing code to use the _nested() primitives, be careful and
smaller window prevents congestion and facilitates better pacing,
especially if/when MAC level flow control does not work well or when it is
not supported on the machine. Experimentation may be necessary to attain
- the correct value. This method is provided as a starting point fot the
+ the correct value. This method is provided as a starting point for the
correct receive buffer size.
Setting the min, max, and default receive buffer (RX_WINDOW) size is
performed in the same manner as single connection.
resize()
Analyzes a tnode and optimizes the child array size by either inflating
- or shrinking it repeatedly until it fullfills the criteria for optimal
+ or shrinking it repeatedly until it fulfills the criteria for optimal
level compression. This part follows the original paper pretty closely
and there may be some room for experimentation here.
the Open Firmware client interface, those properties will be created
by the trampoline code in the kernel's prom_init() file. For example,
that's where you'll have to add code to detect your board model and
-set the platform number. However, when using the flatenned device-tree
+set the platform number. However, when using the flattened device-tree
entry point, there is no prom_init() pass, and thus you have to
provide those properties yourself.
4) Note about node and property names and character set
-------------------------------------------------------
-While open firmware provides more flexibe usage of 8859-1, this
+While open firmware provides more flexible usage of 8859-1, this
specification enforces more strict rules. Nodes and properties should
be comprised only of ASCII characters 'a' to 'z', '0' to
'9', ',', '.', '_', '+', '#', '?', and '-'. Node names additionally
so that individual device drivers do not need to be modified to support
EEH recovery. This generic mechanism piggy-backs on the PCI hotplug
infrastructure, and percolates events up through the userspace/udev
-infrastructure. Followiing is a detailed description of how this is
+infrastructure. Following is a detailed description of how this is
accomplished.
EEH must be enabled in the PHB's very early during the boot process,
It should be noted that due to the system hotplug I/O capabilities of a
system the /dev/hvcs* entry that interacts with a particular vty-server
-adapter is not guarenteed to remain the same across system reboots. Look
+adapter is not guaranteed to remain the same across system reboots. Look
in the Q & A section for more on this issue.
---------------------------------------------------------------------------
0 0 Reserved ( must be 0 ) otherwise specification exception occurs.
1 1 Program Event Recording 1 PER enabled,
- PER is used to facilititate debugging e.g. single stepping.
+ PER is used to facilitate debugging e.g. single stepping.
2-4 2-4 Reserved ( must be 0 ).
(e.g. device drivers) can have one separate debug log.
One purpose of this is to inspect the debug logs after a production system crash
in order to analyze the reason for the crash.
-If the system still runs but only a subcomponent which uses dbf failes,
+If the system still runs but only a subcomponent which uses dbf fails,
it is possible to look at the debug logs on a live system via the Linux
debugfs filesystem.
The debug feature may also very useful for kernel and driver development.
initial DEVCONFIG values for each of your aic7xxx controllers as
they are listed, and also record what the machine is detecting as
the proper termination on your controllers. NOTE: the order in
- which the initial DEVCONFIG values are printed out is not gauranteed
+ which the initial DEVCONFIG values are printed out is not guaranteed
to be the same order as the SCSI controllers are registered. The
above option and this option both work on the order of the SCSI
controllers as they are registered, so make sure you match the right
Chris Reahard built a specialized root filesystem for running a DNS
server jailed inside UML. It's available from the download
<http://user-mode-linux.sourceforge.net/dl-sf.html> page in the Jail
- Filesysems section.
+ Filesystems section.
support the GETBOOTSTATUS call.
Some drivers can measure the temperature using the GETTEMP ioctl. The
-returned value is the temperature in degrees farenheit.
+returned value is the temperature in degrees fahrenheit.
int temperature;
ioctl(fd, WDIOC_GETTEMP, &temperature);
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