--- old/hotspot/src/share/vm/gc_implementation/parallelScavenge/parMarkBitMap.cpp	2009-08-01 04:10:51.986135552 +0100
+++ new/hotspot/src/share/vm/gc_implementation/parallelScavenge/parMarkBitMap.cpp	2009-08-01 04:10:51.908778300 +0100
@@ -2,7 +2,7 @@
 #pragma ident "@(#)parMarkBitMap.cpp	1.31 07/10/04 10:49:33 JVM"
 #endif
 /*
- * Copyright 2005-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 2005-2008 Sun Microsystems, Inc.  All Rights Reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -44,7 +44,7 @@
 
   const size_t rs_align = page_sz == (size_t) os::vm_page_size() ? 0 :
     MAX2(page_sz, granularity);
-  ReservedSpace rs(bytes, rs_align, false);
+  ReservedSpace rs(bytes, rs_align, rs_align > 0);
   os::trace_page_sizes("par bitmap", raw_bytes, raw_bytes, page_sz,
 		       rs.base(), rs.size());
   _virtual_space = new PSVirtualSpace(rs, page_sz);
@@ -64,6 +64,8 @@
   if (_virtual_space != NULL) {
     delete _virtual_space;
     _virtual_space = NULL;
+    // Release memory reserved in the space.
+    rs.release();
   }
   return false;
 }