--- /dev/null	2020-01-21 14:53:15.299782962 +0100
+++ new/src/java.base/linux/classes/jdk/internal/platform/CgroupInfo.java	2020-01-21 20:25:19.577146220 +0100
@@ -0,0 +1,70 @@
+/*
+ * Copyright (c) 2020, Red Hat Inc.
+ * 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;
+
+/**
+ * Data structure to hold info from /proc/self/cgroup
+ *
+ * man 7 cgroups
+ *
+ * @see CgroupSubsystemFactory
+ */
+class CgroupInfo {
+
+    private final String name;
+    private final int hierarchyId;
+    private final boolean enabled;
+
+    private CgroupInfo(String name, int hierarchyId, boolean enabled) {
+        this.name = name;
+        this.hierarchyId = hierarchyId;
+        this.enabled = enabled;
+    }
+
+    String getName() {
+        return name;
+    }
+
+    int getHierarchyId() {
+        return hierarchyId;
+    }
+
+    boolean isEnabled() {
+        return enabled;
+    }
+
+    static CgroupInfo fromCgroupsLine(String line) {
+        String[] tokens = line.split("\\s+");
+        if (tokens.length != 4) {
+            return null;
+        }
+        // discard 3'rd field, num_cgroups
+        return new CgroupInfo(tokens[0] /* name */,
+                              Integer.parseInt(tokens[1]) /* hierarchyId */,
+                              (Integer.parseInt(tokens[3]) == 1) /* enabled */);
+    }
+
+}