--- old/src/java.base/share/classes/jdk/internal/platform/MetricsCgroupV1.java	2020-02-18 11:57:40.308731299 +0100
+++ /dev/null	2020-02-18 07:38:19.571312140 +0100
@@ -1,168 +0,0 @@
-/*
- * Copyright (c) 2018, 2020, Oracle and/or its affiliates. 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.  Oracle designates this
- * particular file as subject to the "Classpath" exception as provided
- * by Oracle in the LICENSE file that accompanied this code.
- *
- * 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.
- */
-
-package jdk.internal.platform;
-
-/**
- *
- * Cgroup v1 extensions to the Metrics interface.
- *
- */
-public interface MetricsCgroupV1 extends Metrics {
-
-    /**
-     * Returns the largest amount of physical memory, in bytes, that
-     * have been allocated in the Isolation Group.
-     *
-     * @return The largest amount of memory in bytes or -1 if this
-     *         metric is not available. Returns -2 if this metric is not
-     *         supported.
-     *
-     */
-    public long getMemoryMaxUsage();
-
-    /**
-     * Returns the number of times that kernel memory requests in the
-     * Isolation Group have exceeded the kernel memory limit.
-     *
-     * @return The number of exceeded requests or -1 if metric
-     *         is not available.
-     *
-     */
-    public long getKernelMemoryFailCount();
-
-    /**
-     * Returns the maximum amount of kernel physical memory, in bytes, that
-     * can be allocated in the Isolation Group.
-     *
-     * @return The maximum amount of memory in bytes or -1 if
-     *         there is no limit set.
-     *
-     */
-    public long getKernelMemoryLimit();
-
-    /**
-     * Returns the largest amount of kernel physical memory, in bytes, that
-     * have been allocated in the Isolation Group.
-     *
-     * @return The largest amount of memory in bytes or -1 if this
-     *         metric is not available.
-     *
-     */
-    public long getKernelMemoryMaxUsage();
-
-    /**
-     * Returns the amount of kernel physical memory, in bytes, that
-     * is currently allocated in the current Isolation Group.
-     *
-     * @return The amount of memory in bytes allocated or -1 if this
-     *         metric is not available.
-     *
-     */
-    public long getKernelMemoryUsage();
-
-    /**
-     * Returns the number of times that networking memory requests in the
-     * Isolation Group have exceeded the kernel memory limit.
-     *
-     * @return The number of exceeded requests or -1 if the metric
-     *         is not available.
-     *
-     */
-    public long getTcpMemoryFailCount();
-
-    /**
-     * Returns the maximum amount of networking physical memory, in bytes,
-     * that can be allocated in the Isolation Group.
-     *
-     * @return The maximum amount of memory in bytes or -1 if
-     *         there is no limit.
-     *
-     */
-    public long getTcpMemoryLimit();
-
-    /**
-     * Returns the largest amount of networking physical memory, in bytes,
-     * that have been allocated in the Isolation Group.
-     *
-     * @return The largest amount of memory in bytes or -1 if this
-     *         metric is not available.
-     *
-     */
-    public long getTcpMemoryMaxUsage();
-
-    /**
-     * Returns the number of times that user memory requests in the
-     * Isolation Group have exceeded the memory + swap limit.
-     *
-     * @return The number of exceeded requests or -1 if the metric
-     *         is not available.
-     *
-     */
-    public long getMemoryAndSwapFailCount();
-
-    /**
-     * Returns the largest amount of physical memory and swap space,
-     * in bytes, that have been allocated in the Isolation Group.
-     *
-     * @return The largest amount of memory in bytes or -1 if this
-     *         metric is not available.
-     *
-     */
-    public long getMemoryAndSwapMaxUsage();
-
-    /**
-     * Returns the state of the Operating System Out of Memory termination
-     * policy.
-     *
-     * @return Returns true if operating system will terminate processes
-     *         in the Isolation Group that exceed the amount of available
-     *         memory, otherwise false. null will be returned if this
-     *         capability is not available on the current operating system.
-     *
-     */
-    public Boolean isMemoryOOMKillEnabled();
-
-    /**
-     * Returns the (attempts per second * 1000), if enabled, that the
-     * operating system tries to satisfy a memory request for any
-     * process in the current Isolation Group when no free memory is
-     * readily available.  Use {@link #isCpuSetMemoryPressureEnabled()} to
-     * determine if this support is enabled.
-     *
-     * @return Memory pressure or 0 if not enabled or -1 if metric is not
-     *         available.
-     *
-     */
-    public double getCpuSetMemoryPressure();
-
-    /**
-     * Returns the state of the memory pressure detection support.
-     *
-     * @return true if support is available and enabled. false otherwise.
-     *
-     */
-    public Boolean isCpuSetMemoryPressureEnabled();
-}