[FE training-materials-updates] Module parameters: use more common example
Michael Opdenacker
michael.opdenacker at free-electrons.com
Mon Dec 5 15:35:48 CET 2016
Repository : git://git.free-electrons.com/training-materials.git
On branch : master
Link : http://git.free-electrons.com/training-materials/commit/?id=f4934c63ddd74858b953c4789554a04c830540a6
>---------------------------------------------------------------
commit f4934c63ddd74858b953c4789554a04c830540a6
Author: Michael Opdenacker <michael.opdenacker at free-electrons.com>
Date: Mon Dec 5 15:25:01 2016 +0100
Module parameters: use more common example
- snd-intel doesn't seem to exist any more
- usb-storage shows better that parameters are global
settings for modules, not stuff that could be bound to
a single device.
- usb-storage.delay_use is also interesting to talk about
Signed-off-by: Michael Opdenacker <michael.opdenacker at free-electrons.com>
>---------------------------------------------------------------
f4934c63ddd74858b953c4789554a04c830540a6
.../sysdev-linux-intro-modules.tex | 16 +++++++++-------
1 file changed, 9 insertions(+), 7 deletions(-)
diff --git a/slides/sysdev-linux-intro-modules/sysdev-linux-intro-modules.tex b/slides/sysdev-linux-intro-modules/sysdev-linux-intro-modules.tex
index 205b4fc..d437e94 100644
--- a/slides/sysdev-linux-intro-modules/sysdev-linux-intro-modules.tex
+++ b/slides/sysdev-linux-intro-modules/sysdev-linux-intro-modules.tex
@@ -111,18 +111,20 @@ $ dmesg
\frametitle{Passing parameters to modules}
\begin{itemize}
\item Find available parameters:\\
- \code{modinfo snd-intel8x0m}
+ \code{modinfo usb-storage}
\item Through \code{insmod}:\\
- \code{sudo insmod ./snd-intel8x0m.ko index=-2}
+ \code{sudo insmod ./usb-storage.ko delay_use=0}
\item Through \code{modprobe}:\\
Set parameters in \code{/etc/modprobe.conf} or in any file in \code{/etc/modprobe.d/}:\\
- \code{options snd-intel8x0m index=-2}
+ \code{options usb-storage delay_use=0}
\item Through the kernel command line, when the driver is built statically into the kernel:\\
- \code{snd-intel8x0m.index=-2}
+ \code{usb-storage.delay_use=0}
\begin{itemize}
- \item \code{snd-intel8x0m} is the {\em driver name}
- \item \code{index} is the {\em driver parameter name}
- \item \code{-2} is the {\em driver parameter value}
+ \item \code{usb-storage} is the {\em driver name}
+ \item \code{delay_use} is the {\em driver parameter name}. It
+ specifies a delay before accessing a USB storage device (useful for
+ rotating devices).
+ \item \code{0} is the {\em driver parameter value}
\end{itemize}
\end{itemize}
\end{frame}
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