--- /dev/null	2020-02-11 09:31:42.601809740 +0100
+++ new/src/java.base/share/classes/jdk/internal/platform/MetricsCgroupV1.java	2020-02-11 18:28:07.661511331 +0100
@@ -0,0 +1,168 @@
+/*
+ * 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();
+}