--- old/src/hotspot/share/memory/metaspace/chunkHeaderPool.hpp	2020-09-04 13:58:19.673551520 +0200
+++ /dev/null	2020-09-04 12:37:41.765504620 +0200
@@ -1,149 +0,0 @@
-/*
- * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
- * Copyright (c) 2020 SAP SE. 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.
- *
- */
-
-#ifndef SHARE_MEMORY_METASPACE_CHUNKHEADERPOOL_HPP
-#define SHARE_MEMORY_METASPACE_CHUNKHEADERPOOL_HPP
-
-#include "memory/allocation.hpp"
-#include "memory/metaspace/metachunk.hpp"
-#include "memory/metaspace/metachunkList.hpp"
-#include "utilities/debug.hpp"
-#include "utilities/globalDefinitions.hpp"
-
-namespace metaspace {
-
-// Chunk headers (Metachunk objects) are separate entities from their payload.
-//  Since they are allocated and released frequently in the course of buddy allocation
-//  (splitting, merging chunks happens often) we want allocation of them fast. Therefore
-//  we keep them in a simple pool (somewhat like a primitive slab allocator).
-
-class ChunkHeaderPool : public CHeapObj<mtMetaspace> {
-
-  static const int slab_capacity = 128;
-
-  struct slab_t : public CHeapObj<mtMetaspace> {
-    slab_t* next;
-    int top;
-    Metachunk elems [slab_capacity];
-    slab_t() : next(NULL), top(0) {
-      for (int i = 0; i < slab_capacity; i++) {
-        elems[i].clear();
-      }
-    }
-  };
-
-  IntCounter _num_slabs;
-  slab_t* _first_slab;
-  slab_t* _current_slab;
-
-  IntCounter _num_handed_out;
-
-  MetachunkList _freelist;
-
-  void allocate_new_slab();
-
-  static ChunkHeaderPool* _chunkHeaderPool;
-
-
-public:
-
-  ChunkHeaderPool();
-
-  ~ChunkHeaderPool();
-
-  // Allocates a Metachunk structure. The structure is uninitialized.
-  Metachunk* allocate_chunk_header() {
-
-    Metachunk* c = NULL;
-
-    DEBUG_ONLY(verify(false));
-
-    c = _freelist.remove_first();
-    assert(c == NULL || c->is_dead(), "Not a freelist chunk header?");
-
-    if (c == NULL) {
-
-      if (_current_slab == NULL ||
-          _current_slab->top == slab_capacity) {
-        allocate_new_slab();
-        assert(_current_slab->top < slab_capacity, "Sanity");
-      }
-
-      c = _current_slab->elems + _current_slab->top;
-      _current_slab->top ++;
-
-    }
-
-    _num_handed_out.increment();
-
-    // By contract, the returned structure is uninitialized.
-    // Zap to make this clear.
-    DEBUG_ONLY(c->zap_header(0xBB);)
-
-    return c;
-
-  }
-
-  void return_chunk_header(Metachunk* c) {
-    // We only ever should return free chunks, since returning chunks
-    // happens only on merging and merging only works with free chunks.
-    assert(c != NULL && c->is_free(), "Sanity");
-#ifdef ASSERT
-    // In debug, fill dead header with pattern.
-    c->zap_header(0xCC);
-    c->set_next(NULL);
-    c->set_prev(NULL);
-#endif
-    c->set_dead();
-    _freelist.add(c);
-    _num_handed_out.decrement();
-
-  }
-
-  // Returns number of allocated elements.
-  int used() const                   { return _num_handed_out.get(); }
-
-  // Returns number of elements in free list.
-  int freelist_size() const          { return _freelist.count(); }
-
-  // Returns size of memory used.
-  size_t memory_footprint_words() const;
-
-  DEBUG_ONLY(void verify(bool slow) const;)
-
-  static void initialize();
-
-  // Returns reference to the one global chunk header pool.
-  static ChunkHeaderPool* pool() { return _chunkHeaderPool; }
-
-};
-
-
-} // namespace metaspace
-
-
-
-
-#endif // SHARE_MEMORY_METASPACE_CHUNKHEADERPOOL_HPP