diff -r f0312c7d5b37 -r ba6c248cae19 src/hotspot/share/gc/shared/gcVMOperations.cpp
--- a/src/hotspot/share/gc/shared/gcVMOperations.cpp	Wed Nov 13 11:21:15 2019 +0100
+++ b/src/hotspot/share/gc/shared/gcVMOperations.cpp	Wed Nov 13 11:37:29 2019 +0100
@@ -192,13 +192,6 @@
 
 // Returns true iff concurrent GCs unloads metadata.
 bool VM_CollectForMetadataAllocation::initiate_concurrent_GC() {
-#if INCLUDE_CMSGC
-  if (UseConcMarkSweepGC && CMSClassUnloadingEnabled) {
-    MetaspaceGC::set_should_concurrent_collect(true);
-    return true;
-  }
-#endif
-
 #if INCLUDE_G1GC
   if (UseG1GC && ClassUnloadingWithConcurrentMark) {
     G1CollectedHeap* g1h = G1CollectedHeap::heap();
@@ -238,13 +231,13 @@
   }
 
   if (initiate_concurrent_GC()) {
-    // For CMS and G1 expand since the collection is going to be concurrent.
+    // For G1 expand since the collection is going to be concurrent.
     _result = _loader_data->metaspace_non_null()->expand_and_allocate(_size, _mdtype);
     if (_result != NULL) {
       return;
     }
 
-    log_debug(gc)("%s full GC for Metaspace", UseConcMarkSweepGC ? "CMS" : "G1");
+    log_debug(gc)("G1 full GC for Metaspace");
   }
 
   // Don't clear the soft refs yet.