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documentation/dev-manual/dev-manual-kernel-appendix.xml: config example 

I had to add some changes to the way we invoke qemu to show multiple
processor support.  I needed the qemuparam "-smp 2".  There are
other minor edits as well.

(From yocto-docs rev: 508863634ce537b0936f8e44f87b90bef678c122)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Scott Rifenbark 2011-10-05 12:07:29 -07:00 committed by Richard Purdie
parent 720446629b
commit e02d553b45
1 changed files with 29 additions and 5 deletions
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34
documentation/dev-manual/dev-manual-kernel-appendix.xml
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@ -503,6 +503,23 @@
<section id='getting-set-up-to-run-this-example'>
<title>Getting Set Up to Run this Example</title>
<para>
If you took the time to work through the example that modifies the kernel source code
in "<link linkend='modifying-the-kernel-source-code'>Modifying the Kernel Source
Code</link>" you should already have the Yocto Project files set up on your
host machine.
</para>
<para>
If you don't have the Yocto Project files established on your system,
See "<link linkend='setting-up-the-local-yocto-project-files-git-repository'>Setting
Up the Local Yocto Project Files Git Repository</link>" for
information.
To reconfigure the kernel, this is the only Git repository you need to have set up.
</para>
<!--
<para>
If you took the time to work through the example that modifies the kernel source code
in "<link linkend='modifying-the-kernel-source-code'>Modifying the Kernel Source
@ -530,7 +547,7 @@
and Booting the Default QEMU Kernel image</link>" for information.
Do not boot the image in the QEMU emulator at this point.</para></listitem>
</itemizedlist>
</para>
</para> -->
</section>
<section id='examining-the-default-config-smp-behavior'>
@ -541,7 +558,7 @@
To see this default setting from within the QEMU emulator, boot your image using
the emulator as follows:
<literallayout class='monospaced'>
$ runqemu qemux86
$ runqemu qemux86 qemuparams="-smp 2"
</literallayout>
</para>
@ -627,12 +644,19 @@
<para>
A good method to isolate changed configurations is to use a combination of the
<filename>menuconfig</filename> tool and simple shell commands.
Before changing configurations with <filename>menuconfig</filename>, simply rename
the default <filename>.config</filename>, use <filename>menuconfig</filename> to make
Before changing configurations with <filename>menuconfig</filename>, copy the
existing <filename>.config</filename> and rename it to something else,
use <filename>menuconfig</filename> to make
as many changes an you want and save them, then compare the renamed configuration
file against the newly created file.
You can use the resulting differences as your base to create configuration fragments
to permanently save in your kernel layer.
<note>
Be sure to make a copy of the <filename>.config</filename> and don't just
rename it.
The Yocto Project build system needs an existing <filename>.config</filename>
from which to work.
</note>
</para>
</section>
@ -651,7 +675,7 @@
<para>
Now run the QEMU emulator:
<literallayout class='monospaced'>
$ runqemu qemux86
$ runqemu qemux86 qemuparams="-smp 2"
</literallayout>
</para>