src/share/vm/runtime/os.hpp

rev 5146 : imported patch first-patch

@@ -250,10 +250,15 @@
   // particular, a single page can be used when region_min_size ==
   // region_max_size == a supported page size.
   static size_t page_size_for_region(size_t region_min_size,
                                      size_t region_max_size,
                                      uint min_pages);
+  // return the largest page size that can be used
+  static size_t max_page_size() {
+    // the _page_sizes array is sorted in descending order.
+    return _page_sizes[0];
+  }
 
   // Methods for tracing page sizes returned by the above method; enabled by
   // TracePageSizes.  The region_{min,max}_size parameters should be the values
   // passed to page_size_for_region() and page_size should be the result of that
   // call.  The (optional) base and size parameters should come from the