--- old/src/hotspot/share/runtime/thread.hpp	2019-08-28 15:00:56.494963777 -0400
+++ new/src/hotspot/share/runtime/thread.hpp	2019-08-28 15:00:56.318963783 -0400
@@ -415,6 +415,7 @@
   int om_free_provision;                        // # to try to allocate next
   ObjectMonitor* om_in_use_list;                // SLL of in-use ObjectMonitors
   int om_in_use_count;                          // # on om_in_use_list
+  volatile bool om_request_deflation;           // request deflation of idle monitors
 
 #ifdef ASSERT
  private: