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diff --git a/src/ceph/src/test/journal/test_JournalTrimmer.cc b/src/ceph/src/test/journal/test_JournalTrimmer.cc
new file mode 100644
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+++ b/src/ceph/src/test/journal/test_JournalTrimmer.cc
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "journal/JournalTrimmer.h"
+#include "journal/JournalMetadata.h"
+#include "include/stringify.h"
+#include "test/journal/RadosTestFixture.h"
+#include <limits>
+#include <list>
+
+class TestJournalTrimmer : public RadosTestFixture {
+public:
+
+  void TearDown() override {
+    for (MetadataList::iterator it = m_metadata_list.begin();
+         it != m_metadata_list.end(); ++it) {
+      (*it)->remove_listener(&m_listener);
+    }
+    m_metadata_list.clear();
+
+    for (std::list<journal::JournalTrimmer*>::iterator it = m_trimmers.begin();
+         it != m_trimmers.end(); ++it) {
+      C_SaferCond ctx;
+      (*it)->shut_down(&ctx);
+      ASSERT_EQ(0, ctx.wait());
+      delete *it;
+    }
+    RadosTestFixture::TearDown();
+  }
+
+  int append_payload(journal::JournalMetadataPtr metadata,
+                     const std::string &oid, uint64_t object_num,
+                     const std::string &payload, uint64_t *commit_tid) {
+    int r = append(oid + "." + stringify(object_num), create_payload(payload));
+    uint64_t tid = metadata->allocate_commit_tid(object_num, 234, 123);
+    if (commit_tid != NULL) {
+      *commit_tid = tid;
+    }
+    return r;
+  }
+
+  journal::JournalMetadataPtr create_metadata(const std::string &oid) {
+    journal::JournalMetadataPtr metadata = RadosTestFixture::create_metadata(
+      oid);
+    m_metadata_list.push_back(metadata);
+    metadata->add_listener(&m_listener);
+    return metadata;
+  }
+
+  journal::JournalTrimmer *create_trimmer(const std::string &oid,
+                                            const journal::JournalMetadataPtr &metadata) {
+    journal::JournalTrimmer *trimmer(new journal::JournalTrimmer(
+      m_ioctx, oid + ".", metadata));
+    m_trimmers.push_back(trimmer);
+    return trimmer;
+  }
+
+  int assert_exists(const std::string &oid) {
+    librados::ObjectWriteOperation op;
+    op.assert_exists();
+    return m_ioctx.operate(oid, &op);
+  }
+
+  typedef std::list<journal::JournalMetadataPtr> MetadataList;
+  MetadataList m_metadata_list;
+  std::list<journal::JournalTrimmer*> m_trimmers;
+};
+
+TEST_F(TestJournalTrimmer, Committed) {
+  std::string oid = get_temp_oid();
+  ASSERT_EQ(0, create(oid, 12, 2));
+  ASSERT_EQ(0, client_register(oid));
+
+  journal::JournalMetadataPtr metadata = create_metadata(oid);
+  ASSERT_EQ(0, init_metadata(metadata));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(0, metadata->set_active_set(10));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  uint64_t commit_tid1;
+  uint64_t commit_tid2;
+  uint64_t commit_tid3;
+  uint64_t commit_tid4;
+  uint64_t commit_tid5;
+  uint64_t commit_tid6;
+  ASSERT_EQ(0, append_payload(metadata, oid, 0, "payload", &commit_tid1));
+  ASSERT_EQ(0, append_payload(metadata, oid, 4, "payload", &commit_tid2));
+  ASSERT_EQ(0, append_payload(metadata, oid, 5, "payload", &commit_tid3));
+  ASSERT_EQ(0, append_payload(metadata, oid, 0, "payload", &commit_tid4));
+  ASSERT_EQ(0, append_payload(metadata, oid, 4, "payload", &commit_tid5));
+  ASSERT_EQ(0, append_payload(metadata, oid, 5, "payload", &commit_tid6));
+
+  journal::JournalTrimmer *trimmer = create_trimmer(oid, metadata);
+
+  trimmer->committed(commit_tid4);
+  trimmer->committed(commit_tid6);
+  trimmer->committed(commit_tid2);
+  trimmer->committed(commit_tid5);
+  trimmer->committed(commit_tid3);
+  trimmer->committed(commit_tid1);
+  while (metadata->get_minimum_set() != 2U) {
+    ASSERT_TRUE(wait_for_update(metadata));
+  }
+
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".0"));
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".2"));
+  ASSERT_EQ(0, assert_exists(oid + ".5"));
+}
+
+TEST_F(TestJournalTrimmer, CommittedWithOtherClient) {
+  std::string oid = get_temp_oid();
+  ASSERT_EQ(0, create(oid, 12, 2));
+  ASSERT_EQ(0, client_register(oid));
+  ASSERT_EQ(0, client_register(oid, "client2", "slow client"));
+
+  journal::JournalMetadataPtr metadata = create_metadata(oid);
+  ASSERT_EQ(0, init_metadata(metadata));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(0, metadata->set_active_set(10));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  uint64_t commit_tid1;
+  uint64_t commit_tid2;
+  uint64_t commit_tid3;
+  uint64_t commit_tid4;
+  ASSERT_EQ(0, append_payload(metadata, oid, 0, "payload", &commit_tid1));
+  ASSERT_EQ(0, append_payload(metadata, oid, 2, "payload", &commit_tid2));
+  ASSERT_EQ(0, append_payload(metadata, oid, 3, "payload", &commit_tid3));
+  ASSERT_EQ(0, append_payload(metadata, oid, 5, "payload", &commit_tid4));
+
+  journal::JournalTrimmer *trimmer = create_trimmer(oid, metadata);
+
+  trimmer->committed(commit_tid1);
+  trimmer->committed(commit_tid2);
+  trimmer->committed(commit_tid3);
+  trimmer->committed(commit_tid4);
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(0, assert_exists(oid + ".0"));
+  ASSERT_EQ(0, assert_exists(oid + ".2"));
+  ASSERT_EQ(0, assert_exists(oid + ".3"));
+  ASSERT_EQ(0, assert_exists(oid + ".5"));
+}
+
+TEST_F(TestJournalTrimmer, RemoveObjects) {
+  std::string oid = get_temp_oid();
+  ASSERT_EQ(0, create(oid, 12, 2));
+  ASSERT_EQ(0, client_register(oid));
+
+  journal::JournalMetadataPtr metadata = create_metadata(oid);
+  ASSERT_EQ(0, init_metadata(metadata));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(0, metadata->set_active_set(10));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(0, append(oid + ".0", create_payload("payload")));
+  ASSERT_EQ(0, append(oid + ".2", create_payload("payload")));
+  ASSERT_EQ(0, append(oid + ".3", create_payload("payload")));
+  ASSERT_EQ(0, append(oid + ".5", create_payload("payload")));
+
+  journal::JournalTrimmer *trimmer = create_trimmer(oid, metadata);
+
+  C_SaferCond cond;
+  trimmer->remove_objects(false, &cond);
+  ASSERT_EQ(0, cond.wait());
+
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".0"));
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".2"));
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".3"));
+  ASSERT_EQ(-ENOENT, assert_exists(oid + ".5"));
+}
+
+TEST_F(TestJournalTrimmer, RemoveObjectsWithOtherClient) {
+  std::string oid = get_temp_oid();
+  ASSERT_EQ(0, create(oid, 12, 2));
+  ASSERT_EQ(0, client_register(oid));
+  ASSERT_EQ(0, client_register(oid, "client2", "other client"));
+
+  journal::JournalMetadataPtr metadata = create_metadata(oid);
+  ASSERT_EQ(0, init_metadata(metadata));
+  ASSERT_TRUE(wait_for_update(metadata));
+
+  journal::JournalTrimmer *trimmer = create_trimmer(oid, metadata);
+
+  C_SaferCond ctx1;
+  trimmer->remove_objects(false, &ctx1);
+  ASSERT_EQ(-EBUSY, ctx1.wait());
+
+  C_SaferCond ctx2;
+  trimmer->remove_objects(true, &ctx2);
+  ASSERT_EQ(0, ctx2.wait());
+}
+