[deployment-guide: 5/185] Added information about the irqbalance service. (BZ#620961)

[Jaromir Hradilek]

commit 83587090a1c1a60e1322126589f6f5c1ae8d1759
Author: Jaromir Hradilek <jhradile at redhat.com>
Date:   Tue Dec 7 00:13:24 2010 +0100

    Added information about the irqbalance service. (BZ#620961)

 en-US/Controlling_Access_to_Services.xml |   15 +++++++++++++--
 1 files changed, 13 insertions(+), 2 deletions(-)
---
diff --git a/en-US/Controlling_Access_to_Services.xml b/en-US/Controlling_Access_to_Services.xml
index fe3d22d..8f1a34b 100644
--- a/en-US/Controlling_Access_to_Services.xml
+++ b/en-US/Controlling_Access_to_Services.xml
@@ -10,7 +10,7 @@
     Maintaining security on your system is extremely important, and one approach for this task is to manage access to system services carefully. Your system may need to provide open access to particular services (for example, <command>httpd</command> if you are running a web server). However, if you do not need to provide a service, you should turn it off to minimize your exposure to possible bug exploits.
   </para>
   <para>
-    This chapter explains the concept of runlevels, and describes how to set the default one. It also covers the setup of the services to be run in each of them using three different utilities: the <application>Service Configuration</application> graphical application, the <application>ntsysv</application> text user interface, and the <application>chkconfig</application> command line tool. Finally, it describes how to start, stop, and restart the services on a command line using the <application>service</application> command.
+    This chapter explains the concept of runlevels, and describes how to set the default one. It also covers the setup of the services to be run in each of these runlevels, and provides information on how to start, stop, and restart the services on a command line using the <application>service</application> command.
   </para>
   <important>
     <title>Important</title>
@@ -117,10 +117,21 @@ Password:</screen>
   </section>
   <section id="s1-services-configuring">
     <title>Configuring the Services</title>
+    <para>
+      To allow you to configure which services are started at boot time, &MAJOROS; is shipped with the following utilities: the <application>Service Configuration</application> graphical application, the <application>ntsysv</application> text user interface, and the <application>chkconfig</application> command line tool. 
+    </para>
+    <important>
+      <title>Important: Enabling the <systemitem class="service">irqbalance</systemitem> Service</title>
+      <para>
+        To ensure optimal performance on POWER architecture, it is recommended that the <systemitem class="service">irqbalance</systemitem> service is enabled. In most cases, this service is installed and configured to run during the &MAJOROSVER; installation. To verify that <systemitem class="service">irqbalance</systemitem> is running, as <systemitem class="username">root</systemitem>, type the following at a shell prompt:
+      </para>
+      <screen>~]# <command>service irqbalance status</command>
+irqbalance (pid  1234) is running...</screen>
+    </important>
     <section id="s2-services-serviceconf">
       <title>Using the <application>Service Configuration</application> Utility</title>
       <para>
-        The <application>Service Configuration</application> utility is a graphical application developed by Red Hat to configure which services are started at boot time, as well as to start, stop, and restart them from the menu.
+        The <application>Service Configuration</application> utility is a graphical application developed by Red Hat to configure which services are started in a particular runlevel, as well as to start, stop, and restart them from the menu.
       </para>
       <indexterm significance="normal">
         <primary>