Documentation updates for Helgrind.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@11828 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/NEWS b/NEWS
index 5a73890..c00c414 100644
--- a/NEWS
+++ b/NEWS
@@ -6,6 +6,23 @@
on 64-bit targets.
- new variant --smc-check=all-non-file
+- hg: performance improvements and memory use reductions, particularly
+ for large, long running applications which perform many synch events.
+
+ showing of locksets for both threads involved in a race
+
+ general improvement of formatting/clarity of error messages
+
+ add facilities and documentation regarding annotation of thread safe
+ reference counted C++ classes
+
+ new flag --check-stack-refs=no|yes [yes], to disable race checking
+ on thread stacks (performance hack)
+
+ new flag --free-is-write=no|yes [no], to enable detection of races
+ where one thread accesses heap memory but another one frees it,
+ without any coordinating synchronisation event
+
* IBM z/Architecture (s390x) running Linux
Valgrind can analyse 64-bit programs running on z/Architecture.
Most user space instructions up to and including z10 are supported.