Changes between Version 3 and Version 4 of ReleaseNotes/1.6

Timestamp:

Nov 2, 2010, 5:00:45 PM (10 years ago)

Author:

rme

Comment:

--

ReleaseNotes/1.6

@@ -125 +125 @@
 Code-coverage improvements.
 
-objc:remove-lisp-slots
+The Objective-C bridge allows the user to define Objective-C classes that include lisp slots.
+The bridge is usually able to arrange for these slots to be removed at #/dealloc time.  Sometimes classes
+will need override the new method objc:remove-lisp-slots;  user-defined #/dealloc methods
+should call objc:remove-lisp-slots as well as calling the next method, after doing class-specific
+cleanup.  See r14202.
 
-Stop using a Linux-specific mmap option (MAP_GROWSDOWN) that didn't do what we
-thought it did, and that exposes what seems to be a kernel bug on some recent Ubuntu-distributed
-kernels.
+Some recent Linux kernels distributed by Ubuntu (at least), including 2.6.32-24.41 and probably others,
+appear to contain a bug that causes mmap to return an unmapped address in certain cases where the
+MAP_GROWSDOWN mmap option is used (see ticket:731).  This made ccl crash on startup.
+It turns out that MAP_GROWSDOWN doesn't
+do what we thought it did in any case, so we no longer use it, and these crashed no longer happen.
 
-Many other bug fixes.
+Many other minor bug fixes.
 
 == Support ==