hotspot/src/share/vm/memory/heap.cpp

rev 611 : Merge

@@ -1,10 +1,10 @@
 #ifdef USE_PRAGMA_IDENT_SRC
 #pragma ident "@(#)heap.cpp     1.55 07/10/04 10:49:31 JVM"
 #endif
 /*
- * Copyright 1997-2006 Sun Microsystems, Inc.  All Rights Reserved.
+ * Copyright 1997-2008 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
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.

@@ -103,20 +103,21 @@
 
   _segment_size      = segment_size;
   _log2_segment_size = exact_log2(segment_size);
 
   // Reserve and initialize space for _memory.
-  const size_t page_size = os::page_size_for_region(committed_size,
-                                                    reserved_size, 8);
+  const size_t page_size = os::can_execute_large_page_memory() ?
+          os::page_size_for_region(committed_size, reserved_size, 8) :
+          os::vm_page_size();
   const size_t granularity = os::vm_allocation_granularity();
   const size_t r_align = MAX2(page_size, granularity);
   const size_t r_size = align_size_up(reserved_size, r_align);
   const size_t c_size = align_size_up(committed_size, page_size);
   
   const size_t rs_align = page_size == (size_t) os::vm_page_size() ? 0 :
     MAX2(page_size, granularity);
-  ReservedSpace rs(r_size, rs_align, false);
+  ReservedSpace rs(r_size, rs_align, rs_align > 0);
   os::trace_page_sizes("code heap", committed_size, reserved_size, page_size,
                        rs.base(), rs.size());
   if (!_memory.initialize(rs, c_size)) {
     return false;
   }