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Commit 17a9e7bb authored by Randy Dunlap's avatar Randy Dunlap Committed by Jens Axboe
Browse files

Documentation: remove anticipatory scheduler info 



Remove anticipatory block I/O scheduler info from Documentation/
since the code has been deleted.

Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Reported-by: default avatar"Robert P. J. Day" <rpjday@crashcourse.ca>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: default avatarJens Axboe <jaxboe@fusionio.com>
parent 02e031cb

Documentation/block/switching-sched.txt

+4 −4
Original line number Diff line number Diff line
@@ -16,7 +16,7 @@ you can do so by typing: 
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

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

can improve that device's throughput).



To set a specific scheduler, simply do this:
@@ -31,7 +31,7 @@ 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

noop deadline [cfq]

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

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

noop [anticipatory] deadline cfq
 
noop [deadline] cfq

Documentation/kernel-parameters.txt

+1 −1
Original line number Diff line number Diff line
@@ -706,7 +706,7 @@ and is between 256 and 4096 characters. It is defined in the file 
			arch/x86/kernel/cpu/cpufreq/elanfreq.c.



	elevator=	[IOSCHED]

			Format: {"anticipatory" | "cfq" | "deadline" | "noop"}

			Format: {"cfq" | "deadline" | "noop"}

			See Documentation/block/as-iosched.txt and

			Documentation/block/deadline-iosched.txt for details.

Documentation/rbtree.txt

+2 −2
Original line number Diff line number Diff line
@@ -21,8 +21,8 @@ three rotations, respectively, to balance the tree), with slightly slower 
To quote Linux Weekly News:



    There are a number of red-black trees in use in the kernel.

    The anticipatory, deadline, and CFQ I/O schedulers all employ

    rbtrees to track requests; the packet CD/DVD driver does the same.

    The deadline and CFQ I/O schedulers employ rbtrees to

    track requests; the packet CD/DVD driver does the same.

    The high-resolution timer code uses an rbtree to organize outstanding

    timer requests.  The ext3 filesystem tracks directory entries in a

    red-black tree.  Virtual memory areas (VMAs) are tracked with red-black