more on posix_spawn

Author: vladak

proc.tex

@@ -430,7 +430,8 @@
 subsequent \texttt{exec}.  This problem was partially solved via already
 mentioned copy-on-write mechanism.  See \example{fork/vfork.c} on how it works.
 \item The problems of \texttt{vfork} are largely solved by
-\texttt{posix\_spawn}. See page \pageref{SPAWN}.
+\texttt{posix\_spawn} if implemented in kernel (it is usually
+\texttt{vfork} wrapper). See page \pageref{SPAWN}.
 \end{itemize}
 
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