gencgc: Reduce conservatism for pointers to unboxed pages.

[sbcl.git] / NEWS

diff --git a/NEWS b/NEWS
index a46e058..5977d64 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,6 @@
 ;;;; -*- coding: utf-8; fill-column: 78 -*-
 changes relative to sbcl-1.1.14:
+  * improvement: support for "Mac Roman" external format.
   * new feature: the iterative spilling/coloring register allocator developed
     by Alexandra Barchunova during Google Summer of Code 2013 is now merged
     in.  By default, it only activates for functions that optimize with
@@ -13,6 +14,10 @@ changes relative to sbcl-1.1.14:
   * enhancement: sb-ext:save-lisp-and-die on Windows now accepts
     :application-type argument, which can be :console or :gui. :gui allows
     having GUI applications without an automatically appearing console window.
+  * enhancement: reduced conservativism on GENCGC platforms:
+    conservative roots that point to unboxed pages must be tagged
+    pointers to the start of a valid-looking object, not merely point
+    to within the allocated part of the page, in order to pin the page.
   * bug fix: Windows applications without the console window no longer misbehave.
     (patch by Wilfredo Velazquez, lp#1256034).
   * bug fix: modular arithmetic optimizations do not stumble on dead branches