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Commit 9707b271 authored by Jeff Garzik's avatar Jeff Garzik
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Merge branch 'master'

parents 8fc65162 402a26f0

Documentation/block/switching-sched.txt

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As of the Linux 2.6.10 kernel, it is now possible to change the

IO scheduler for a given block device on the fly (thus making it possible,

for instance, to set the CFQ scheduler for the system default, but

set a specific device to use the anticipatory or noop schedulers - which

can improve that device's throughput).



To set a specific scheduler, simply do this:



echo SCHEDNAME > /sys/block/DEV/queue/scheduler



where SCHEDNAME is the name of a defined IO scheduler, and DEV is the

device name (hda, hdb, sga, or whatever you happen to have).



The list of defined schedulers can be found by simply doing

a "cat /sys/block/DEV/queue/scheduler" - the list of valid names

will be displayed, with the currently selected scheduler in brackets:



# cat /sys/block/hda/queue/scheduler

noop anticipatory deadline [cfq]

# echo anticipatory > /sys/block/hda/queue/scheduler

# cat /sys/block/hda/queue/scheduler

noop [anticipatory] deadline cfq

Documentation/cpu-freq/index.txt

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@@ -53,4 +53,4 @@ the CPUFreq Mailing list: 
* http://lists.linux.org.uk/mailman/listinfo/cpufreq



Clock and voltage scaling for the SA-1100:

* http://www.lart.tudelft.nl/projects/scaling
 
* http://www.lartmaker.nl/projects/scaling

Documentation/feature-removal-schedule.txt

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@@ -25,8 +25,9 @@ Who: Adrian Bunk <bunk@stusta.de> 


---------------------------



What:	drivers depending on OBSOLETE_OSS_DRIVER

When:	January 2006

What:	drivers that were depending on OBSOLETE_OSS_DRIVER

        (config options already removed)

When:	before 2.6.19

Why:	OSS drivers with ALSA replacements

Who:	Adrian Bunk <bunk@stusta.de>

Documentation/serial/driver

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@@ -3,14 +3,11 @@ 
			--------------------





   $Id: driver,v 1.10 2002/07/22 15:27:30 rmk Exp $





This document is meant as a brief overview of some aspects of the new serial

driver.  It is not complete, any questions you have should be directed to

<rmk@arm.linux.org.uk>



The reference implementation is contained within serial_amba.c.

The reference implementation is contained within amba_pl011.c.
@@ -31,6 +28,11 @@ The serial core provides a few helper functions. This includes identifing 
the correct port structure (via uart_get_console) and decoding command line

arguments (uart_parse_options).



There is also a helper function (uart_write_console) which performs a

character by character write, translating newlines to CRLF sequences.

Driver writers are recommended to use this function rather than implementing

their own version.





Locking

-------
@@ -86,6 +88,7 @@ hardware. 
		- TIOCM_DTR	DTR signal.

		- TIOCM_OUT1	OUT1 signal.

		- TIOCM_OUT2	OUT2 signal.

		- TIOCM_LOOP	Set the port into loopback mode.

	If the appropriate bit is set, the signal should be driven

	active.  If the bit is clear, the signal should be driven

	inactive.
@@ -141,6 +144,10 @@ hardware. 
  enable_ms(port)

	Enable the modem status interrupts.



	This method may be called multiple times.  Modem status

	interrupts should be disabled when the shutdown method is

	called.



	Locking: port->lock taken.

	Interrupts: locally disabled.

	This call must not sleep
@@ -160,6 +167,8 @@ hardware. 
	state.  Enable the port for reception.  It should not activate

	RTS nor DTR; this will be done via a separate call to set_mctrl.



	This method will only be called when the port is initially opened.



	Locking: port_sem taken.

	Interrupts: globally disabled.
@@ -169,6 +178,11 @@ hardware. 
	RTS nor DTR; this will have already been done via a separate

	call to set_mctrl.



	Drivers must not access port->info once this call has completed.



	This method will only be called when there are no more users of

	this port.



	Locking: port_sem taken.

	Interrupts: caller dependent.

Documentation/vm/hugetlbpage.txt

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@@ -32,7 +32,16 @@ The output of "cat /proc/meminfo" will have lines like: 
.....

HugePages_Total: xxx

HugePages_Free:  yyy

Hugepagesize:    zzz KB

HugePages_Rsvd:  www

Hugepagesize:    zzz kB



where:

HugePages_Total is the size of the pool of hugepages.

HugePages_Free is the number of hugepages in the pool that are not yet

allocated.

HugePages_Rsvd is short for "reserved," and is the number of hugepages

for which a commitment to allocate from the pool has been made, but no

allocation has yet been made. It's vaguely analogous to overcommit.



/proc/filesystems should also show a filesystem of type "hugetlbfs" configured

in the kernel.