--- embedaddon/php/Zend/README.ZEND_MM	2012/02/21 23:47:52	1.1.1.1
+++ embedaddon/php/Zend/README.ZEND_MM	2012/05/29 12:34:35	1.1.1.2
@@ -9,7 +9,7 @@ allocation overhead and speedup memory management.
 
 The new manager's "configure" has no "--disable-zend-memory-manager" option,
 but it has "--enable-malloc-mm" instead.  It is enabled by default in DEBUG
-build and disabled by default in RELEASE build.  when enabled it allows selecting
+build and disabled by default in RELEASE build. When enabled it allows selecting
 between malloc and emalloc at runtime so you can use internal and external memory
 debuggers without recompilation.
 
@@ -23,6 +23,15 @@ Normal:
 Zend MM disabled:
 
     $ USE_ZEND_ALLOC=0 valgrind --leak-check=full sapi/cli/php -r 'leak();'
+
+Shared extensions:
+------------------
+
+Since PHP 5.3.11 it is possible to prevent shared extensions from unloading so
+that valgrind can correctly track the memory leaks in shared extensions. For
+this there is the ZEND_DONT_UNLOAD_MODULES environment variable. If set, then
+DL_UNLOAD() is skipped during the shutdown of shared extensions.
+
 
 Tweaking:
 ---------