Several kernel-related textual changes

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@3722 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

1 files changed, 27 insertions, 7 deletions

diff --git a/chapter08/kernel.xml b/chapter08/kernel.xml
index 6c5123ee0..41f658c04 100644
--- a/chapter08/kernel.xml
+++ b/chapter08/kernel.xml
@@ -64,8 +64,9 @@ scratch.</para>
 the <quote>File systems</quote> menu and is normally enabled by default.</para>
 
 <para>LFS bootscripts make the assumption that you either compile
-"USB device filesystem" directly into the kernel, or don't compile it at
-all. They will not work properly if it is a module (usbcore.ko).</para>
+both "Support for Host-side USB" and
+"USB device filesystem" directly into the kernel, or don't compile them at
+all. Bootscripts will not work properly if it is a module (usbcore.ko).</para>
 
 <note><para>NPTL requires the kernel to be compiled with GCC 3.x, in this case
 &gcc-version;. Compiling with 2.95.x is known to cause failures in the glibc
@@ -76,16 +77,35 @@ unless you know what you're getting yourself into.</para></note>
 
 <screen><userinput>make</userinput></screen>
 
-<para>If you intend to use kernel modules, you will need an
+<para>If you intend to use kernel modules, you may need an
 <filename>/etc/modprobe.conf</filename> file. Information pertaining
 to modules and to kernel configuration in general may be found in the
 kernel documentation, which is found in the
-<filename>linux-&linux-version;/Documentation</filename> directory. The
-modules.conf man page and the kernel HOWTO at
-<ulink url="http://www.tldp.org/HOWTO/Kernel-HOWTO.html"/> may also be of
+<filename>linux-&linux-version;/Documentation</filename> directory.
+The
+modprobe.conf man page
+<!-- removed for review from tldp.org
+and the kernel HOWTO at
+<ulink url="http://www.tldp.org/HOWTO/Kernel-HOWTO.html"/> -->
+may also be of
 interest to you.</para>
 
-<para>Install the modules:</para>
+<para>Be very suspicious while reading other documentation, because it
+usually applies to 2.4.x kernels only. As far as the editors know, kernel
+configuration issues specific to Hotplug and Udev
+are documented nowhere. The problem is that Udev will create a device node
+only if Hotplug or a user-written script inserts the corresponding module
+into the kernel, and not all modules are detectable by Hotplug. Note
+that statements like
+<screen>alias char-major-XXX some-module</screen>
+in <filename>/etc/modprobe.conf</filename> file don't work with
+Udev, and other aliases are often unnecessary with Hotplug.</para>
+
+<para>Because of all those compilcations with Hotplug, Udev and modules, we
+strongly recommend you to start with a completely non-modular kernel
+configuration, especially if this is the first time you use Udev.</para>
+
+<para>Install the modules, if your kernel configuration uses them:</para>
 
 <screen><userinput>make modules_install</userinput></screen>