[PATCH 2/3] Replace io by I/O where approbiate.

From: Martin Steigerwald
Date: Mon Nov 28 2011 - 10:12:55 EST


---
Documentation/block/ioprio.txt | 20 ++++++++++----------
1 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/Documentation/block/ioprio.txt b/Documentation/block/ioprio.txt
index a555c59..4775a95 100644
--- a/Documentation/block/ioprio.txt
+++ b/Documentation/block/ioprio.txt
@@ -5,37 +5,37 @@ Block io priorities
Intro
-----

-With the introduction of cfq v3 (aka cfq-ts or time sliced cfq), basic io
+With the introduction of cfq v3 (aka cfq-ts or time sliced cfq), basic I/O
priorities are supported for reads and direct, not buffered, writes on files
-This enables users to io nice processes or process groups, similar to what
+This enables users to I/O nice processes or process groups, similar to what
has been possible with cpu scheduling for ages. This document mainly details
-the current possibilities with cfq; other io schedulers do not support io
+the current possibilities with cfq; other I/O schedulers do not support I/O
priorities thus far.

Scheduling classes
------------------

-CFQ implements three generic scheduling classes that determine how io is
+CFQ implements three generic scheduling classes that determine how I/O is
served for a process.

-IOPRIO_CLASS_RT: This is the realtime io class. This scheduling class is given
+IOPRIO_CLASS_RT: This is the realtime I/O class. This scheduling class is given
higher priority than any other in the system, processes from this class are
given first access to the disk every time. Thus it needs to be used with some
-care, one io RT process can starve the entire system. Within the RT class,
+care, one I/O RT process can starve the entire system. Within the RT class,
there are 8 levels of class data that determine exactly how much time this
process needs the disk for on each service. In the future this might change
to be more directly mappable to performance, by passing in a wanted data
rate instead.

IOPRIO_CLASS_BE: This is the best-effort scheduling class, which is the default
-for any process that hasn't set a specific io priority. The class data
-determines how much io bandwidth the process will get, it's directly mappable
+for any process that hasn't set a specific I/O priority. The class data
+determines how much I/O bandwidth the process will get, it's directly mappable
to the cpu nice levels just more coarsely implemented. 0 is the highest
-BE prio level, 7 is the lowest. The mapping between cpu nice level and io
+BE prio level, 7 is the lowest. The mapping between cpu nice level and I/O
nice level is determined as: io_nice = (cpu_nice + 20) / 5.

IOPRIO_CLASS_IDLE: This is the idle scheduling class, processes running at this
-level only get io time when no one else needs the disk. The idle class has no
+level only get I/O time when no one else needs the disk. The idle class has no
class data, since it doesn't really apply here.

Tools
--
1.7.7.3


Thanks,
--
Martin Steigerwald - teamix GmbH - http://www.teamix.de
gpg: 19E3 8D42 896F D004 08AC A0CA 1E10 C593 0399 AE90
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