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diff --git a/src/ceph/src/test/common/test_mutex_debug.cc b/src/ceph/src/test/common/test_mutex_debug.cc
new file mode 100644
index 0000000..49cd499
--- /dev/null
+++ b/src/ceph/src/test/common/test_mutex_debug.cc
@@ -0,0 +1,101 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 &smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2011 New Dream Network
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License version 2, as published by the Free Software
+ * Foundation.  See file COPYING.
+ *
+ */
+
+#include <future>
+#include <mutex>
+#include <thread>
+
+#include "common/mutex_debug.h"
+
+#include "gtest/gtest.h"
+
+
+template<typename Mutex>
+static bool test_try_lock(Mutex* m) {
+  if (!m->try_lock())
+    return false;
+  m->unlock();
+  return true;
+}
+
+template<typename Mutex>
+static void test_lock() {
+  Mutex m;
+  auto ttl = &test_try_lock<Mutex>;
+
+  m.lock();
+  ASSERT_TRUE(m.is_locked());
+  auto f1 = std::async(std::launch::async, ttl, &m);
+  ASSERT_FALSE(f1.get());
+
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_TRUE(!!m);
+
+  m.unlock();
+  ASSERT_FALSE(m.is_locked());
+  ASSERT_FALSE(!!m);
+
+  auto f3 = std::async(std::launch::async, ttl, &m);
+  ASSERT_TRUE(f3.get());
+
+  ASSERT_FALSE(m.is_locked());
+  ASSERT_FALSE(!!m);
+}
+
+TEST(MutexDebug, Lock) {
+  test_lock<ceph::mutex_debug>();
+}
+
+TEST(MutexDebug, NotRecursive) {
+  ceph::mutex_debug m;
+  auto ttl = &test_try_lock<mutex_debug>;
+
+  ASSERT_NO_THROW(m.lock());
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_FALSE(std::async(std::launch::async, ttl, &m).get());
+
+  ASSERT_THROW(m.lock(), std::system_error);
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_FALSE(std::async(std::launch::async, ttl, &m).get());
+
+  ASSERT_NO_THROW(m.unlock());
+  ASSERT_FALSE(m.is_locked());
+  ASSERT_TRUE(std::async(std::launch::async, ttl, &m).get());
+}
+
+TEST(MutexRecursiveDebug, Lock) {
+  test_lock<ceph::mutex_recursive_debug>();
+}
+
+
+TEST(MutexRecursiveDebug, Recursive) {
+  ceph::mutex_recursive_debug m;
+  auto ttl = &test_try_lock<mutex_recursive_debug>;
+
+  ASSERT_NO_THROW(m.lock());
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_FALSE(std::async(std::launch::async, ttl, &m).get());
+
+  ASSERT_NO_THROW(m.lock());
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_FALSE(std::async(std::launch::async, ttl, &m).get());
+
+  ASSERT_NO_THROW(m.unlock());
+  ASSERT_TRUE(m.is_locked());
+  ASSERT_FALSE(std::async(std::launch::async, ttl, &m).get());
+
+  ASSERT_NO_THROW(m.unlock());
+  ASSERT_FALSE(m.is_locked());
+  ASSERT_TRUE(std::async(std::launch::async, ttl, &m).get());
+}