[bootlin/training-materials updates] master: Boot time slides: mention "CONFIG_FEATURE_PREFER_APPLETS" in BusyBox (52ad69fa)

[Michael Opdenacker]

Repository : https://github.com/bootlin/training-materials
On branch  : master
Link       : https://github.com/bootlin/training-materials/commit/52ad69fa746c6b23c14175b0c532d62f10406110

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commit 52ad69fa746c6b23c14175b0c532d62f10406110
Author: Michael Opdenacker <michael.opdenacker at bootlin.com>
Date:   Mon May 2 14:58:50 2022 +0200

    Boot time slides: mention "CONFIG_FEATURE_PREFER_APPLETS" in BusyBox
    
    Signed-off-by: Michael Opdenacker <michael.opdenacker at bootlin.com>


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52ad69fa746c6b23c14175b0c532d62f10406110
 .../boot-time-init-scripts.tex                     | 36 +++++++++++++---------
 1 file changed, 22 insertions(+), 14 deletions(-)

diff --git a/slides/boot-time-init-scripts/boot-time-init-scripts.tex b/slides/boot-time-init-scripts/boot-time-init-scripts.tex
index ad47a7c8..3d65e962 100644
--- a/slides/boot-time-init-scripts/boot-time-init-scripts.tex
+++ b/slides/boot-time-init-scripts/boot-time-init-scripts.tex
@@ -142,27 +142,35 @@ int main (void)
       BusyBox, you can use \code{echo}, \code{test}, \code{printf}
       and others as shell built-ins. At run time, use the \code{type}
       command to check whether a command is a built-in. Example:
-      \code{type echo}
-\item Pipes and back-quotes are also implemented by
-      \code{fork}/\code{exec}.  You can reduce their usage in
-      scripts. Example:
-      \begin{block}{}
-      \begin{verbatim}
+      \code{type echo}.
+\item BusyBox also has a {\em exec prefer applets} setting
+      (\code{CONFIG_FEATURE_PREFER_APPLETS}) trying to run the corresponding
+      applet (instead of making an \code{exec} call), typically in shells
+      or in commands such as \code{find -exec}.
+\end{itemize}
+\end{frame}
+
+\begin{frame}[fragile]
+\frametitle{Reduce forking (2)}
+Pipes and back-quotes are also implemented by
+\code{fork}/\code{exec}.  You can reduce their usage in
+scripts. Example:
+\begin{block}{}
+\begin{verbatim}
 cat /proc/cpuinfo | grep model
-      \end{verbatim}
-      \end{block}
+\end{verbatim}
+\end{block}
 Replace it with:
-      \begin{block}{}
-      \begin{verbatim}
+\begin{block}{}
+\begin{verbatim}
 grep model /proc/cpuinfo
-      \end{verbatim}
-      \end{block}
-\end{itemize}
+\end{verbatim}
+\end{block}
 See \url{https://elinux.org/Optimize_RC_Scripts}
 \end{frame}
 
 \begin{frame}[fragile]
-\frametitle{Reduce forking (2)}
+\frametitle{Reduce forking (3)}
 Replaced:
 \begin{block}{}
 \begin{verbatim}