# HG changeset patch
# User Sebastien Jodogne <s.jodogne@gmail.com>
# Date 1596567198 -7200
# Node ID a735476a0e6e2fb4e832ddbcc4f98ea9a8fa19ce
# Parent  b8c7519448d205da3e9797e9ce737e21e0c6f4c8
note about fork on windows

diff -r b8c7519448d2 -r a735476a0e6e Sphinx/source/plugins/python.rst
--- a/Sphinx/source/plugins/python.rst	Sat Jul 25 21:23:13 2020 +0200
+++ b/Sphinx/source/plugins/python.rst	Tue Aug 04 20:53:18 2020 +0200
@@ -567,6 +567,11 @@
 Performance and concurrency
 ---------------------------
 
+**Important:** This section only applies to UNIX-like systems. The
+``multiprocessing`` package will not work on Microsoft Windows as the
+latter OS has a different model for `forking processes
+<https://en.wikipedia.org/wiki/Fork_(system_call)>`__.
+
 .. highlight:: python
 
 Let us consider the following sample Python script that makes a