Skip to content

Commit

Permalink
---
Browse files Browse the repository at this point in the history
yaml
---
r: 221848
b: refs/heads/master
c: 17a9e7b
h: refs/heads/master
v: v3
  • Loading branch information
Randy Dunlap authored and Jens Axboe committed Nov 11, 2010
1 parent 21a7861 commit 07498c9
Show file tree
Hide file tree
Showing 4 changed files with 8 additions and 8 deletions.
2 changes: 1 addition & 1 deletion [refs]
Original file line number Diff line number Diff line change
@@ -1,2 +1,2 @@
---
refs/heads/master: 02e031cbc843b010e72fcc05c76113c688b2860f
refs/heads/master: 17a9e7bbae178d1326e4631ab6350a272349c99d
8 changes: 4 additions & 4 deletions trunk/Documentation/block/switching-sched.txt
Original file line number Diff line number Diff line change
Expand Up @@ -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:
Expand All @@ -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
2 changes: 1 addition & 1 deletion trunk/Documentation/kernel-parameters.txt
Original file line number Diff line number Diff line change
Expand Up @@ -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.

Expand Down
4 changes: 2 additions & 2 deletions trunk/Documentation/rbtree.txt
Original file line number Diff line number Diff line change
Expand Up @@ -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
Expand Down

0 comments on commit 07498c9

Please sign in to comment.