--- a/src/hotspot/share/classfile/classLoaderDataGraph.cpp	Mon Nov 25 15:00:32 2019 +0100
+++ b/src/hotspot/share/classfile/classLoaderDataGraph.cpp	Mon Nov 25 15:21:44 2019 +0000
@@ -186,10 +186,7 @@
 // GC root of class loader data created.
 ClassLoaderData* volatile ClassLoaderDataGraph::_head = NULL;
 ClassLoaderData* ClassLoaderDataGraph::_unloading = NULL;
-ClassLoaderData* ClassLoaderDataGraph::_saved_unloading = NULL;
-ClassLoaderData* ClassLoaderDataGraph::_saved_head = NULL;
 
-bool ClassLoaderDataGraph::_should_purge = false;
 bool ClassLoaderDataGraph::_should_clean_deallocate_lists = false;
 bool ClassLoaderDataGraph::_safepoint_cleanup_needed = false;
 bool ClassLoaderDataGraph::_metaspace_oom = false;
@@ -249,9 +246,7 @@
 
 void ClassLoaderDataGraph::cld_unloading_do(CLDClosure* cl) {
   assert_locked_or_safepoint_weak(ClassLoaderDataGraph_lock);
-  // Only walk the head until any clds not purged from prior unloading
-  // (CMS doesn't purge right away).
-  for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
+  for (ClassLoaderData* cld = _unloading; cld != NULL; cld = cld->next()) {
     assert(cld->is_unloading(), "invariant");
     cl->do_cld(cld);
   }
@@ -381,9 +376,7 @@
 
 void ClassLoaderDataGraph::modules_unloading_do(void f(ModuleEntry*)) {
   assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
-  // Only walk the head until any clds not purged from prior unloading
-  // (CMS doesn't purge right away).
-  for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
+  for (ClassLoaderData* cld = _unloading; cld != NULL; cld = cld->next()) {
     assert(cld->is_unloading(), "invariant");
     cld->modules_do(f);
   }
@@ -399,9 +392,7 @@
 
 void ClassLoaderDataGraph::packages_unloading_do(void f(PackageEntry*)) {
   assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
-  // Only walk the head until any clds not purged from prior unloading
-  // (CMS doesn't purge right away).
-  for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
+  for (ClassLoaderData* cld = _unloading; cld != NULL; cld = cld->next()) {
     assert(cld->is_unloading(), "invariant");
     cld->packages_do(f);
   }
@@ -424,9 +415,7 @@
 
 void ClassLoaderDataGraph::classes_unloading_do(void f(Klass* const)) {
   assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
-  // Only walk the head until any clds not purged from prior unloading
-  // (CMS doesn't purge right away).
-  for (ClassLoaderData* cld = _unloading; cld != _saved_unloading; cld = cld->next()) {
+  for (ClassLoaderData* cld = _unloading; cld != NULL; cld = cld->next()) {
     assert(cld->is_unloading(), "invariant");
     cld->classes_do(f);
   }
@@ -476,32 +465,6 @@
   }
 }
 
-GrowableArray<ClassLoaderData*>* ClassLoaderDataGraph::new_clds() {
-  assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
-  assert(_head == NULL || _saved_head != NULL, "remember_new_clds(true) not called?");
-
-  GrowableArray<ClassLoaderData*>* array = new GrowableArray<ClassLoaderData*>();
-
-  // The CLDs in [_head, _saved_head] were all added during last call to remember_new_clds(true);
-  ClassLoaderData* curr = _head;
-  while (curr != _saved_head) {
-    if (!curr->claimed(ClassLoaderData::_claim_strong)) {
-      array->push(curr);
-      LogTarget(Debug, class, loader, data) lt;
-      if (lt.is_enabled()) {
-        LogStream ls(lt);
-        ls.print("found new CLD: ");
-        curr->print_value_on(&ls);
-        ls.cr();
-      }
-    }
-
-    curr = curr->_next;
-  }
-
-  return array;
-}
-
 #ifndef PRODUCT
 bool ClassLoaderDataGraph::contains_loader_data(ClassLoaderData* loader_data) {
   assert_locked_or_safepoint(ClassLoaderDataGraph_lock);
@@ -544,10 +507,6 @@
   uint loaders_processed = 0;
   uint loaders_removed = 0;
 
-  // Save previous _unloading pointer for CMS which may add to unloading list before
-  // purging and we don't want to rewalk the previously unloaded class loader data.
-  _saved_unloading = _unloading;
-
   data = _head;
   while (data != NULL) {
     if (data->is_alive()) {