--- /dev/null	2016-05-02 13:22:44.000000000 +0300
+++ new/test/native/runtime/test_os.cpp	2016-05-02 13:22:43.000000000 +0300
@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. 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.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+#include "runtime/os.hpp"
+#include "unittest.hpp"
+
+TEST_VM(os, page_size_for_region) {
+  size_t large_page_example = 4 * M;
+  size_t large_page = os::page_size_for_region_aligned(large_page_example, 1);
+
+  size_t small_page = os::vm_page_size();
+  if (large_page > small_page) {
+    size_t num_small_in_large = large_page / small_page;
+    size_t page = os::page_size_for_region_aligned(large_page, num_small_in_large);
+    ASSERT_EQ(page, small_page) << "Did not get a small page";
+  }
+}
+
+#ifdef ASSERT
+TEST_VM_ASSERT_MSG(os, page_size_for_region_with_zero_min_pages, "sanity") {
+  size_t region_size = 16 * os::vm_page_size();
+  os::page_size_for_region_aligned(region_size, 0); // should assert
+}
+#endif