share/runtime/java.cpp

rev 1 : G1GC+POGC+NVDIMM Patch with latest comments incorporated from all.

@@ -590,10 +590,20 @@
   notify_vm_shutdown();
 }
 
 void vm_shutdown()
 {
+  if (os::has_nvdimm() && UseParallelOldGC) {
+    // all expand/shrinks for UseParallelOldGC need nvdimm_fd to
+    // remain open so that more/less sized can be committed to nvdimm
+#if defined(_WINDOWS)
+    // Do nothing as file is already closed as all the memory for OldGen was
+    // mapped in one shot for NVDIMM.
+#else
+    os::close(os::nvdimm_fd());
+#endif
+  }
   vm_perform_shutdown_actions();
   os::wait_for_keypress_at_exit();
   os::shutdown();
 }