posix_spawn() does not have to be implemented as a syscall

Author: vladak

proc.tex

@@ -909,12 +909,10 @@
 \item Note that you have to use macros from the previous slide to get the
 child's return value out of the status information.
 \item \label{WAITPID} Example: \example{wait/wait.c}
-\item \label{SPAWN} Creating new process with \texttt{fork} and replacing the
-process address space etc. with a new one after \texttt{exec} has been done is
-expensive and has other problems. To make kernel create new process directly
-from executable \texttt{posix\_spawn} can be used. The new process can be waited
-on with \texttt{waitpid} etc. just like in the case of \texttt{fork}.
-Example: \example{exec/spawn.c}
+\item \label{SPAWN} Alternative for the \texttt{fork}/\texttt{exec} combination
+can be the \texttt{posix\_spawn} function. The new process using this function
+can be waited on with \texttt{waitpid} etc. just like in the case of
+\texttt{fork}. Example: \example{exec/spawn.c}
 \end{itemize}
 
 %%%%%