diff --git a/base/include/android-base/logging.h b/base/include/android-base/logging.h
index ab6476c..d099e52 100644
--- a/base/include/android-base/logging.h
+++ b/base/include/android-base/logging.h
@@ -222,20 +222,16 @@
 // 1) This will not check whether the severity is high enough. One should use WOULD_LOG to filter
 //    usage manually.
 // 2) This does not save and restore errno.
-#define LOG_STREAM(severity) LOG_STREAM_TO(DEFAULT, severity)
-
-// Get an ostream that can be used for logging at the given severity and to the
-// given destination. The same notes as for LOG_STREAM apply.
-#define LOG_STREAM_TO(dest, severity)                                           \
-  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest,        \
-                              SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, -1) \
+#define LOG_STREAM(severity)                                                                    \
+  ::android::base::LogMessage(__FILE__, __LINE__, SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, \
+                              -1)                                                               \
       .stream()
 
 // Logs a message to logcat on Android otherwise to stderr. If the severity is
 // FATAL it also causes an abort. For example:
 //
 //     LOG(FATAL) << "We didn't expect to reach here";
-#define LOG(severity) LOG_TO(DEFAULT, severity)
+#define LOG(severity) LOGGING_PREAMBLE(severity) && LOG_STREAM(severity)
 
 // Checks if we want to log something, and sets up appropriate RAII objects if
 // so.
@@ -245,21 +241,12 @@
    ABORT_AFTER_LOG_EXPR_IF((SEVERITY_LAMBDA(severity)) == ::android::base::FATAL, true) && \
    ::android::base::ErrnoRestorer())
 
-// Logs a message to logcat with the specified log ID on Android otherwise to
-// stderr. If the severity is FATAL it also causes an abort.
-// Use an expression here so we can support the << operator following the macro,
-// like "LOG(DEBUG) << xxx;".
-#define LOG_TO(dest, severity) LOGGING_PREAMBLE(severity) && LOG_STREAM_TO(dest, severity)
-
 // A variant of LOG that also logs the current errno value. To be used when
 // library calls fail.
-#define PLOG(severity) PLOG_TO(DEFAULT, severity)
-
-// Behaves like PLOG, but logs to the specified log ID.
-#define PLOG_TO(dest, severity)                                                        \
-  LOGGING_PREAMBLE(severity) &&                                                        \
-      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::dest,           \
-                                  SEVERITY_LAMBDA(severity), _LOG_TAG_INTERNAL, errno) \
+#define PLOG(severity)                                                           \
+  LOGGING_PREAMBLE(severity) &&                                                  \
+      ::android::base::LogMessage(__FILE__, __LINE__, SEVERITY_LAMBDA(severity), \
+                                  _LOG_TAG_INTERNAL, errno)                      \
           .stream()
 
 // Marker that code is yet to be implemented.
@@ -272,24 +259,23 @@
 //
 //     CHECK(false == true) results in a log message of
 //       "Check failed: false == true".
-#define CHECK(x)                                                                 \
-  LIKELY((x)) || ABORT_AFTER_LOG_FATAL_EXPR(false) ||                            \
-      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,  \
-                                  ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
-              .stream()                                                          \
+#define CHECK(x)                                                                                 \
+  LIKELY((x)) || ABORT_AFTER_LOG_FATAL_EXPR(false) ||                                            \
+      ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, _LOG_TAG_INTERNAL, \
+                                  -1)                                                            \
+              .stream()                                                                          \
           << "Check failed: " #x << " "
 
 // clang-format off
 // Helper for CHECK_xx(x,y) macros.
-#define CHECK_OP(LHS, RHS, OP)                                                                 \
-  for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS);                           \
-       UNLIKELY(!(_values.lhs OP _values.rhs));                                                \
-       /* empty */)                                                                            \
-  ABORT_AFTER_LOG_FATAL                                                                        \
-  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,                    \
-                              ::android::base::FATAL, _LOG_TAG_INTERNAL, -1)                   \
-          .stream()                                                                            \
-      << "Check failed: " << #LHS << " " << #OP << " " << #RHS << " (" #LHS "=" << _values.lhs \
+#define CHECK_OP(LHS, RHS, OP)                                                                   \
+  for (auto _values = ::android::base::MakeEagerEvaluator(LHS, RHS);                             \
+       UNLIKELY(!(_values.lhs OP _values.rhs));                                                  \
+       /* empty */)                                                                              \
+  ABORT_AFTER_LOG_FATAL                                                                          \
+  ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
+          .stream()                                                                              \
+      << "Check failed: " << #LHS << " " << #OP << " " << #RHS << " (" #LHS "=" << _values.lhs   \
       << ", " #RHS "=" << _values.rhs << ") "
 // clang-format on
 
@@ -311,8 +297,8 @@
 #define CHECK_STROP(s1, s2, sense)                                             \
   while (UNLIKELY((strcmp(s1, s2) == 0) != (sense)))                           \
     ABORT_AFTER_LOG_FATAL                                                      \
-    ::android::base::LogMessage(__FILE__, __LINE__, ::android::base::DEFAULT,  \
-                                ::android::base::FATAL, _LOG_TAG_INTERNAL, -1) \
+    ::android::base::LogMessage(__FILE__, __LINE__,  ::android::base::FATAL,   \
+                                 _LOG_TAG_INTERNAL, -1)                        \
         .stream()                                                              \
         << "Check failed: " << "\"" << (s1) << "\""                            \
         << ((sense) ? " == " : " != ") << "\"" << (s2) << "\""
@@ -431,8 +417,10 @@
 // of a CHECK. The destructor will abort if the severity is FATAL.
 class LogMessage {
  public:
-  LogMessage(const char* file, unsigned int line, LogId id, LogSeverity severity, const char* tag,
+  // LogId has been deprecated, but this constructor must exist for prebuilts.
+  LogMessage(const char* file, unsigned int line, LogId, LogSeverity severity, const char* tag,
              int error);
+  LogMessage(const char* file, unsigned int line, LogSeverity severity, const char* tag, int error);
 
   ~LogMessage();
 
@@ -441,8 +429,8 @@
   std::ostream& stream();
 
   // The routine that performs the actual logging.
-  static void LogLine(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                      const char* tag, const char* msg);
+  static void LogLine(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                      const char* msg);
 
  private:
   const std::unique_ptr<LogMessageData> data_;
diff --git a/base/logging.cpp b/base/logging.cpp
index f89168c..598a522 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -350,11 +350,10 @@
 // checks/logging in a function.
 class LogMessageData {
  public:
-  LogMessageData(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                 const char* tag, int error)
+  LogMessageData(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                 int error)
       : file_(GetFileBasename(file)),
         line_number_(line),
-        id_(id),
         severity_(severity),
         tag_(tag),
         error_(error) {}
@@ -373,10 +372,6 @@
 
   const char* GetTag() const { return tag_; }
 
-  LogId GetId() const {
-    return id_;
-  }
-
   int GetError() const {
     return error_;
   }
@@ -393,7 +388,6 @@
   std::ostringstream buffer_;
   const char* const file_;
   const unsigned int line_number_;
-  const LogId id_;
   const LogSeverity severity_;
   const char* const tag_;
   const int error_;
@@ -401,9 +395,13 @@
   DISALLOW_COPY_AND_ASSIGN(LogMessageData);
 };
 
-LogMessage::LogMessage(const char* file, unsigned int line, LogId id, LogSeverity severity,
+LogMessage::LogMessage(const char* file, unsigned int line, LogId, LogSeverity severity,
                        const char* tag, int error)
-    : data_(new LogMessageData(file, line, id, severity, tag, error)) {}
+    : LogMessage(file, line, severity, tag, error) {}
+
+LogMessage::LogMessage(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                       int error)
+    : data_(new LogMessageData(file, line, severity, tag, error)) {}
 
 LogMessage::~LogMessage() {
   // Check severity again. This is duplicate work wrt/ LOG macros, but not LOG_STREAM.
@@ -429,16 +427,16 @@
     // Do the actual logging with the lock held.
     std::lock_guard<std::mutex> lock(LoggingLock());
     if (msg.find('\n') == std::string::npos) {
-      LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(), data_->GetSeverity(),
-              data_->GetTag(), msg.c_str());
+      LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(), data_->GetTag(),
+              msg.c_str());
     } else {
       msg += '\n';
       size_t i = 0;
       while (i < msg.size()) {
         size_t nl = msg.find('\n', i);
         msg[nl] = '\0';
-        LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetId(), data_->GetSeverity(),
-                data_->GetTag(), &msg[i]);
+        LogLine(data_->GetFile(), data_->GetLineNumber(), data_->GetSeverity(), data_->GetTag(),
+                &msg[i]);
         // Undo the zero-termination so we can give the complete message to the aborter.
         msg[nl] = '\n';
         i = nl + 1;
@@ -456,16 +454,16 @@
   return data_->GetBuffer();
 }
 
-void LogMessage::LogLine(const char* file, unsigned int line, LogId id, LogSeverity severity,
-                         const char* tag, const char* message) {
+void LogMessage::LogLine(const char* file, unsigned int line, LogSeverity severity, const char* tag,
+                         const char* message) {
   if (tag == nullptr) {
     std::lock_guard<std::recursive_mutex> lock(TagLock());
     if (gDefaultTag == nullptr) {
       gDefaultTag = new std::string(getprogname());
     }
-    Logger()(id, severity, gDefaultTag->c_str(), file, line, message);
+    Logger()(DEFAULT, severity, gDefaultTag->c_str(), file, line, message);
   } else {
-    Logger()(id, severity, tag, file, line, message);
+    Logger()(DEFAULT, severity, tag, file, line, message);
   }
 }
 
diff --git a/fs_mgr/fs_mgr.cpp b/fs_mgr/fs_mgr.cpp
index 17982b3..03c7943 100644
--- a/fs_mgr/fs_mgr.cpp
+++ b/fs_mgr/fs_mgr.cpp
@@ -1380,8 +1380,8 @@
         // Now proceed with other bind mounts on top of /data.
         for (const auto& entry : proc_mounts) {
             if (entry.blk_device == block_device) {
-                LINFO << __FUNCTION__ << "(): Umount " << entry.mount_point;
                 if (umount2(entry.mount_point.c_str(), 0) != 0) {
+                    PERROR << __FUNCTION__ << "(): Failed to umount " << entry.mount_point;
                     umount_done = false;
                 }
             }
diff --git a/fs_mgr/libfiemap/Android.bp b/fs_mgr/libfiemap/Android.bp
index e2df862..1bf457f 100644
--- a/fs_mgr/libfiemap/Android.bp
+++ b/fs_mgr/libfiemap/Android.bp
@@ -79,6 +79,11 @@
     srcs: [
         "fiemap_writer_test.cpp",
     ],
+
+    test_suites: ["vts-core", "device-tests"],
+    auto_gen_config: true,
+    test_min_api_level: 29,
+    require_root: true,
 }
 
 cc_test {
@@ -100,7 +105,3 @@
         "image_test.cpp",
     ],
 }
-
-vts_config {
-    name: "VtsFiemapWriterTest",
-}
diff --git a/fs_mgr/libfiemap/AndroidTest.xml b/fs_mgr/libfiemap/AndroidTest.xml
deleted file mode 100644
index 44c80fc..0000000
--- a/fs_mgr/libfiemap/AndroidTest.xml
+++ /dev/null
@@ -1,30 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!-- Copyright (C) 2019 The Android Open Source Project
-
-     Licensed under the Apache License, Version 2.0 (the "License");
-     you may not use this file except in compliance with the License.
-     You may obtain a copy of the License at
-
-          http://www.apache.org/licenses/LICENSE-2.0
-
-     Unless required by applicable law or agreed to in writing, software
-     distributed under the License is distributed on an "AS IS" BASIS,
-     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-     See the License for the specific language governing permissions and
-     limitations under the License.
--->
-<configuration description="Config for VTS VtsFiemapWriterTest">
-    <option name="config-descriptor:metadata" key="plan" value="vts-kernel" />
-    <target_preparer class="com.android.compatibility.common.tradefed.targetprep.VtsFilePusher">
-        <option name="abort-on-push-failure" value="false"/>
-        <option name="push-group" value="HostDrivenTest.push"/>
-    </target_preparer>
-    <test class="com.android.tradefed.testtype.VtsMultiDeviceTest">
-      <option name="test-module-name" value="VtsFiemapWriterTest"/>
-        <option name="binary-test-source" value="_32bit::DATA/nativetest/fiemap_writer_test/fiemap_writer_test" />
-        <option name="binary-test-source" value="_64bit::DATA/nativetest64/fiemap_writer_test/fiemap_writer_test" />
-        <option name="binary-test-type" value="gtest"/>
-        <option name="precondition-first-api-level" value="29" />
-        <option name="test-timeout" value="1m"/>
-    </test>
-</configuration>
diff --git a/init/README.md b/init/README.md
index b8300fa..4f0a7ec 100644
--- a/init/README.md
+++ b/init/README.md
@@ -487,6 +487,25 @@
   -f: force installation of the module even if the version of the running kernel
   and the version of the kernel for which the module was compiled do not match.
 
+`interface_start <name>` \
+`interface_restart <name>` \
+`interface_stop <name>`
+> Find the service that provides the interface _name_ if it exists and run the `start`, `restart`,
+or `stop` commands on it respectively.  _name_ may be either a fully qualified HIDL name, in which
+case it is specified as `<interface>/<instance>`, or an AIDL name, in which case it is specified as
+`aidl/<interface>` for example `android.hardware.secure_element@1.1::ISecureElement/eSE1` or
+`aidl/aidl_lazy_test_1`.
+
+> Note that these commands only act on interfaces specified by the `interface` service option, not
+on interfaces registered at runtime.
+
+> Example usage of these commands: \
+`interface_start android.hardware.secure_element@1.1::ISecureElement/eSE1`
+will start the HIDL Service that provides the `android.hardware.secure_element@1.1` and `eSI1`
+instance. \
+`interface_start aidl/aidl_lazy_test_1` will start the AIDL service that
+provides the `aidl_lazy_test_1` interface.
+
 `load_system_props`
 > (This action is deprecated and no-op.)
 
@@ -700,6 +719,26 @@
   `/sys/fs/ext4/${dev.mnt.blk.<mount_point>}/` to tune the block device
   characteristics in a device agnostic manner.
 
+Init responds to properties that begin with `ctl.`.  These properties take the format of
+`ctl.<command>` and the _value_ of the system property is used as a parameter, for example:
+`SetProperty("ctl.start", "logd")` will run the `start` command on `logd`.  Note that these
+properties are only settable; they will have no value when read.
+
+`ctl.start` \
+`ctl.restart` \
+`ctl.stop`
+> These are equivalent to using the `start`, `restart`, and `stop` commands on the service specified
+by the _value_ of the property.
+
+`ctl.interface_start` \
+`ctl.interface_restart` \
+`ctl.interface_stop`
+> These are equivalent to using the `interface_start`, `interface_restart`, and `interface_stop`
+commands on the interface specified by the _value_ of the property.
+
+`ctl.sigstop_on` and `ctl.sigstop_off` will turn on or off the _sigstop_ feature for the service
+specified by the _value_ of the property.  See the _Debugging init_ section below for more details
+about this feature.
 
 Boot timing
 -----------
diff --git a/libcutils/include/cutils/trace.h b/libcutils/include/cutils/trace.h
index 79b4b35..e12c32c 100644
--- a/libcutils/include/cutils/trace.h
+++ b/libcutils/include/cutils/trace.h
@@ -25,7 +25,6 @@
 #include <sys/cdefs.h>
 #include <sys/types.h>
 #include <unistd.h>
-
 #include <cutils/compiler.h>
 
 __BEGIN_DECLS
@@ -89,6 +88,12 @@
 #error ATRACE_TAG must be defined to be one of the tags defined in cutils/trace.h
 #endif
 
+// Set this to 0 to revert to the old Binder-based atrace implementation.
+// This is only here in case rollbacks do not apply cleanly.
+// TODO(fmayer): Remove this once we are confident this won't need to be
+// rolled back, no later than 2020-03-01.
+#define ATRACE_SHMEM 1
+
 /**
  * Opens the trace file for writing and reads the property for initial tags.
  * The atrace.tags.enableflags property sets the tags to trace.
@@ -116,11 +121,15 @@
  * prevent tracing within the Zygote process.
  */
 void atrace_set_tracing_enabled(bool enabled);
-
 /**
- * Flag indicating whether setup has been completed, initialized to 0.
- * Nonzero indicates setup has completed.
- * Note: This does NOT indicate whether or not setup was successful.
+ * If !ATRACE_SHMEM:
+ *   Flag indicating whether setup has been completed, initialized to 0.
+ *   Nonzero indicates setup has completed.
+ *   Note: This does NOT indicate whether or not setup was successful.
+ * If ATRACE_SHMEM:
+ *   This is always set to false. This forces code that uses an old version
+ *   of this header to always call into atrace_setup, in which we call
+ *   atrace_init unconditionally.
  */
 extern atomic_bool atrace_is_ready;
 
@@ -143,6 +152,12 @@
  * This can be explicitly run to avoid setup delay on first trace function.
  */
 #define ATRACE_INIT() atrace_init()
+#define ATRACE_GET_ENABLED_TAGS() atrace_get_enabled_tags()
+
+#if ATRACE_SHMEM
+void atrace_init();
+uint64_t atrace_get_enabled_tags();
+#else
 static inline void atrace_init()
 {
     if (CC_UNLIKELY(!atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
@@ -155,12 +170,12 @@
  * It can be used as a guard condition around more expensive trace calculations.
  * Every trace function calls this, which ensures atrace_init is run.
  */
-#define ATRACE_GET_ENABLED_TAGS() atrace_get_enabled_tags()
 static inline uint64_t atrace_get_enabled_tags()
 {
     atrace_init();
     return atrace_enabled_tags;
 }
+#endif
 
 /**
  * Test if a given tag is currently enabled.
diff --git a/libcutils/trace-container.cpp b/libcutils/trace-container.cpp
index d981f8f..c23d5e2 100644
--- a/libcutils/trace-container.cpp
+++ b/libcutils/trace-container.cpp
@@ -39,6 +39,11 @@
 static pthread_mutex_t  atrace_enabling_mutex        = PTHREAD_MUTEX_INITIALIZER;
 static pthread_rwlock_t atrace_container_sock_rwlock = PTHREAD_RWLOCK_INITIALIZER;
 
+static void atrace_seq_number_changed(uint32_t, uint32_t seq_no) {
+    pthread_once(&atrace_once_control, atrace_init_once);
+    atomic_store_explicit(&last_sequence_number, seq_no, memory_order_relaxed);
+}
+
 static bool atrace_init_container_sock()
 {
     pthread_rwlock_wrlock(&atrace_container_sock_rwlock);
diff --git a/libcutils/trace-dev.cpp b/libcutils/trace-dev.cpp
index bff16c1..2ee39d3 100644
--- a/libcutils/trace-dev.cpp
+++ b/libcutils/trace-dev.cpp
@@ -37,12 +37,39 @@
     } else {
       atrace_enabled_tags = atrace_get_property();
     }
+#if !ATRACE_SHMEM
     atomic_store_explicit(&atrace_is_ready, true, memory_order_release);
+#endif
+}
+
+static void atrace_seq_number_changed(uint32_t prev_seq_no, uint32_t seq_no) {
+    if (!atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
+        return;
+    }
+
+    // Someone raced us.
+    if (!atomic_compare_exchange_strong(&last_sequence_number, &prev_seq_no, seq_no)) {
+        return;
+    }
+
+    if (CC_UNLIKELY(prev_seq_no == kSeqNoNotInit)) {
+#if defined(__BIONIC__)
+        const prop_info* new_pi = __system_property_find("debug.atrace.tags.enableflags");
+        if (new_pi) atrace_property_info = new_pi;
+#endif
+        pthread_once(&atrace_once_control, atrace_init_once);
+    }
+
+    atrace_update_tags();
 }
 
 void atrace_setup()
 {
+#if ATRACE_SHMEM
+    atrace_init();
+#else
     pthread_once(&atrace_once_control, atrace_init_once);
+#endif
 }
 
 void atrace_begin_body(const char* name)
diff --git a/libcutils/trace-dev.inc b/libcutils/trace-dev.inc
index e3da77b..a57a4c5 100644
--- a/libcutils/trace-dev.inc
+++ b/libcutils/trace-dev.inc
@@ -34,6 +34,11 @@
 #include <log/log.h>
 #include <log/log_properties.h>
 
+#if defined(__BIONIC__)
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+#endif
+
 /**
  * Maximum size of a message that can be logged to the trace buffer.
  * Note this message includes a tag, the pid, and the string given as the name.
@@ -41,12 +46,57 @@
  */
 #define ATRACE_MESSAGE_LENGTH 1024
 
-atomic_bool             atrace_is_ready      = ATOMIC_VAR_INIT(false);
-int                     atrace_marker_fd     = -1;
-uint64_t                atrace_enabled_tags  = ATRACE_TAG_NOT_READY;
-static bool             atrace_is_debuggable = false;
-static atomic_bool      atrace_is_enabled    = ATOMIC_VAR_INIT(true);
-static pthread_mutex_t  atrace_tags_mutex    = PTHREAD_MUTEX_INITIALIZER;
+constexpr uint32_t kSeqNoNotInit = static_cast<uint32_t>(-1);
+
+atomic_bool              atrace_is_ready      = ATOMIC_VAR_INIT(false);
+int                      atrace_marker_fd     = -1;
+uint64_t                 atrace_enabled_tags  = ATRACE_TAG_NOT_READY;
+static bool              atrace_is_debuggable = false;
+static atomic_bool       atrace_is_enabled    = ATOMIC_VAR_INIT(true);
+static pthread_mutex_t   atrace_tags_mutex    = PTHREAD_MUTEX_INITIALIZER;
+
+/**
+ * Sequence number of debug.atrace.tags.enableflags the last time the enabled
+ * tags were reloaded.
+ **/
+static _Atomic(uint32_t) last_sequence_number = ATOMIC_VAR_INIT(kSeqNoNotInit);
+
+#if defined(__BIONIC__)
+// All zero prop_info that has a sequence number of 0. This is easier than
+// depending on implementation details of the property implementation.
+//
+// prop_info is static_assert-ed to be 96 bytes, which cannot change due to
+// ABI compatibility.
+alignas(uint64_t) static char empty_pi[96];
+static const prop_info* atrace_property_info = reinterpret_cast<const prop_info*>(empty_pi);
+#endif
+
+#if ATRACE_SHMEM
+
+/**
+ * This is called when the sequence number of debug.atrace.tags.enableflags
+ * changes and we need to reload the enabled tags.
+ **/
+static void atrace_seq_number_changed(uint32_t prev_seq_no, uint32_t seq_no);
+
+void atrace_init() {
+#if defined(__BIONIC__)
+    uint32_t seq_no = __system_property_serial(atrace_property_info);  // Acquire semantics.
+#else
+    uint32_t seq_no = 0;
+#endif
+    uint32_t prev_seq_no = atomic_load_explicit(&last_sequence_number, memory_order_relaxed);
+    if (CC_UNLIKELY(seq_no != prev_seq_no)) {
+        atrace_seq_number_changed(prev_seq_no, seq_no);
+    }
+}
+
+uint64_t atrace_get_enabled_tags()
+{
+    atrace_init();
+    return atrace_enabled_tags;
+}
+#endif
 
 // Set whether this process is debuggable, which determines whether
 // application-level tracing is allowed when the ro.debuggable system property
@@ -136,7 +186,7 @@
 void atrace_update_tags()
 {
     uint64_t tags;
-    if (CC_UNLIKELY(atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
+    if (ATRACE_SHMEM || CC_UNLIKELY(atomic_load_explicit(&atrace_is_ready, memory_order_acquire))) {
         if (atomic_load_explicit(&atrace_is_enabled, memory_order_acquire)) {
             tags = atrace_get_property();
             pthread_mutex_lock(&atrace_tags_mutex);
diff --git a/libcutils/trace-host.cpp b/libcutils/trace-host.cpp
index d47cc18..c21d0ee 100644
--- a/libcutils/trace-host.cpp
+++ b/libcutils/trace-host.cpp
@@ -30,3 +30,10 @@
 void atrace_async_end_body(const char* /*name*/, int32_t /*cookie*/) {}
 void atrace_int_body(const char* /*name*/, int32_t /*value*/) {}
 void atrace_int64_body(const char* /*name*/, int64_t /*value*/) {}
+#if ATRACE_SHMEM
+void atrace_init() {}
+uint64_t atrace_get_enabled_tags()
+{
+    return ATRACE_TAG_NOT_READY;
+}
+#endif
diff --git a/storaged/main.cpp b/storaged/main.cpp
index 3817fb5..e35bd6f 100644
--- a/storaged/main.cpp
+++ b/storaged/main.cpp
@@ -51,7 +51,7 @@
     storaged_sp->init();
     storaged_sp->report_storage_info();
 
-    LOG_TO(SYSTEM, INFO) << "storaged: Start";
+    LOG(INFO) << "storaged: Start";
 
     for (;;) {
         storaged_sp->event_checked();
@@ -76,6 +76,8 @@
     bool flag_dump_perf = false;
     int opt;
 
+    android::base::InitLogging(argv, android::base::LogdLogger(android::base::SYSTEM));
+
     for (;;) {
         int opt_idx = 0;
         static struct option long_options[] = {
@@ -124,13 +126,13 @@
         pthread_t storaged_main_thread;
         errno = pthread_create(&storaged_main_thread, NULL, storaged_main, NULL);
         if (errno != 0) {
-            PLOG_TO(SYSTEM, ERROR) << "Failed to create main thread";
+            PLOG(ERROR) << "Failed to create main thread";
             return -1;
         }
 
         if (StoragedService::start() != android::OK ||
             StoragedPrivateService::start() != android::OK) {
-            PLOG_TO(SYSTEM, ERROR) << "Failed to start storaged service";
+            PLOG(ERROR) << "Failed to start storaged service";
             return -1;
         }
 
diff --git a/storaged/storaged.cpp b/storaged/storaged.cpp
index 1d934a2..573b8c5 100644
--- a/storaged/storaged.cpp
+++ b/storaged/storaged.cpp
@@ -97,25 +97,23 @@
 
     health = get_health_service();
     if (health == NULL) {
-        LOG_TO(SYSTEM, WARNING) << "health: failed to find IHealth service";
+        LOG(WARNING) << "health: failed to find IHealth service";
         return;
     }
 
     BatteryStatus status = BatteryStatus::UNKNOWN;
     auto ret = health->getChargeStatus([&](Result r, BatteryStatus v) {
         if (r != Result::SUCCESS) {
-            LOG_TO(SYSTEM, WARNING)
-                << "health: cannot get battery status " << toString(r);
+            LOG(WARNING) << "health: cannot get battery status " << toString(r);
             return;
         }
         if (v == BatteryStatus::UNKNOWN) {
-            LOG_TO(SYSTEM, WARNING) << "health: invalid battery status";
+            LOG(WARNING) << "health: invalid battery status";
         }
         status = v;
     });
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, WARNING) << "health: get charge status transaction error "
-            << ret.description();
+        LOG(WARNING) << "health: get charge status transaction error " << ret.description();
     }
 
     mUidm.init(is_charger_on(status));
@@ -126,11 +124,11 @@
 
 void storaged_t::serviceDied(uint64_t cookie, const wp<::android::hidl::base::V1_0::IBase>& who) {
     if (health != NULL && interfacesEqual(health, who.promote())) {
-        LOG_TO(SYSTEM, ERROR) << "health service died, exiting";
+        LOG(ERROR) << "health service died, exiting";
         android::hardware::IPCThreadState::self()->stopProcess();
         exit(1);
     } else {
-        LOG_TO(SYSTEM, ERROR) << "unknown service died";
+        LOG(ERROR) << "unknown service died";
     }
 }
 
@@ -192,7 +190,7 @@
         reinterpret_cast<const Bytef*>(uid_io_usage.SerializeAsString().c_str()),
         uid_io_usage.ByteSize());
     if (proto.crc() != computed_crc) {
-        LOG_TO(SYSTEM, WARNING) << "CRC mismatch in " << proto_file;
+        LOG(WARNING) << "CRC mismatch in " << proto_file;
         return;
     }
 
@@ -228,8 +226,7 @@
     char* data = nullptr;
     if (posix_memalign(reinterpret_cast<void**>(&data),
                        pagesize, proto->ByteSize())) {
-        PLOG_TO(SYSTEM, ERROR) << "Faied to alloc aligned buffer (size: "
-                               << proto->ByteSize() << ")";
+        PLOG(ERROR) << "Faied to alloc aligned buffer (size: " << proto->ByteSize() << ")";
         return data;
     }
 
@@ -246,7 +243,7 @@
                     (user_id == USER_SYSTEM ? O_DIRECT : 0),
                  S_IRUSR | S_IWUSR)));
     if (fd == -1) {
-        PLOG_TO(SYSTEM, ERROR) << "Faied to open tmp file: " << tmp_file;
+        PLOG(ERROR) << "Faied to open tmp file: " << tmp_file;
         return;
     }
 
@@ -261,7 +258,7 @@
             start = steady_clock::now();
             ret = write(fd, data, MIN(benchmark_unit_size, size));
             if (ret <= 0) {
-                PLOG_TO(SYSTEM, ERROR) << "Faied to write tmp file: " << tmp_file;
+                PLOG(ERROR) << "Faied to write tmp file: " << tmp_file;
                 return;
             }
             end = steady_clock::now();
@@ -284,7 +281,7 @@
         }
     } else {
         if (!WriteFully(fd, data, size)) {
-            PLOG_TO(SYSTEM, ERROR) << "Faied to write tmp file: " << tmp_file;
+            PLOG(ERROR) << "Faied to write tmp file: " << tmp_file;
             return;
         }
     }
@@ -343,22 +340,21 @@
     if (mConfig.event_time_check_usec &&
         clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &start_ts) < 0) {
         check_time = false;
-        PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+        PLOG(ERROR) << "clock_gettime() failed";
     }
 
     event();
 
     if (mConfig.event_time_check_usec && check_time) {
         if (clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_ts) < 0) {
-            PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+            PLOG(ERROR) << "clock_gettime() failed";
             return;
         }
         int64_t cost = (end_ts.tv_sec - start_ts.tv_sec) * SEC_TO_USEC +
                        (end_ts.tv_nsec - start_ts.tv_nsec) / USEC_TO_NSEC;
         if (cost > mConfig.event_time_check_usec) {
-            LOG_TO(SYSTEM, ERROR)
-                << "event loop spent " << cost << " usec, threshold "
-                << mConfig.event_time_check_usec << " usec";
+            LOG(ERROR) << "event loop spent " << cost << " usec, threshold "
+                       << mConfig.event_time_check_usec << " usec";
         }
     }
 }
diff --git a/storaged/storaged_diskstats.cpp b/storaged/storaged_diskstats.cpp
index 8b5001d..52bd4e0 100644
--- a/storaged/storaged_diskstats.cpp
+++ b/storaged/storaged_diskstats.cpp
@@ -41,8 +41,8 @@
     // skip if the input structure are all zeros
     if (perf == NULL || perf->is_zero()) return;
 
-    LOG_TO(SYSTEM, INFO) << "disk_perf " << type
-              << " rd: " << perf->read_perf << " kbps, " << perf->read_ios << " iops"
+    LOG(INFO) << "disk_perf " << type << " rd: " << perf->read_perf << " kbps, " << perf->read_ios
+              << " iops"
               << " wr: " << perf->write_perf << " kbps, " << perf->write_ios << " iops"
               << " q: " << perf->queue;
 }
@@ -71,7 +71,7 @@
     // when system is running.
     int ret = clock_gettime(CLOCK_MONOTONIC, ts);
     if (ret < 0) {
-        PLOG_TO(SYSTEM, ERROR) << "clock_gettime() failed";
+        PLOG(ERROR) << "clock_gettime() failed";
         return false;
     }
     return true;
@@ -93,7 +93,7 @@
 
     std::string buffer;
     if (!android::base::ReadFileToString(disk_stats_path, &buffer)) {
-        PLOG_TO(SYSTEM, ERROR) << disk_stats_path << ": ReadFileToString failed.";
+        PLOG(ERROR) << disk_stats_path << ": ReadFileToString failed.";
         return false;
     }
 
@@ -130,12 +130,12 @@
     bool success = false;
     auto ret = service->getDiskStats([&success, stats](auto result, const auto& halStats) {
         if (result == Result::NOT_SUPPORTED) {
-            LOG_TO(SYSTEM, DEBUG) << "getDiskStats is not supported on health HAL.";
+            LOG(DEBUG) << "getDiskStats is not supported on health HAL.";
             return;
         }
         if (result != Result::SUCCESS || halStats.size() == 0) {
-            LOG_TO(SYSTEM, ERROR) << "getDiskStats failed with result " << toString(result)
-                                  << " and size " << halStats.size();
+            LOG(ERROR) << "getDiskStats failed with result " << toString(result) << " and size "
+                       << halStats.size();
             return;
         }
 
@@ -144,7 +144,7 @@
     });
 
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "getDiskStats failed with " << ret.description();
+        LOG(ERROR) << "getDiskStats failed with " << ret.description();
         return false;
     }
 
@@ -199,9 +199,9 @@
 void add_disk_stats(struct disk_stats* src, struct disk_stats* dst)
 {
     if (dst->end_time != 0 && dst->end_time != src->start_time) {
-        LOG_TO(SYSTEM, WARNING) << "Two dis-continuous periods of diskstats"
-            << " are added. dst end with " << dst->end_time
-            << ", src start with " << src->start_time;
+        LOG(WARNING) << "Two dis-continuous periods of diskstats"
+                     << " are added. dst end with " << dst->end_time << ", src start with "
+                     << src->start_time;
     }
 
     *dst += *src;
diff --git a/storaged/storaged_info.cpp b/storaged/storaged_info.cpp
index 6668cf3..bb21829 100644
--- a/storaged/storaged_info.cpp
+++ b/storaged/storaged_info.cpp
@@ -76,7 +76,7 @@
     if (!perf_history.has_day_start_sec() ||
         perf_history.daily_perf_size() > (int)daily_perf.size() ||
         perf_history.weekly_perf_size() > (int)weekly_perf.size()) {
-        LOG_TO(SYSTEM, ERROR) << "Invalid IOPerfHistory proto";
+        LOG(ERROR) << "Invalid IOPerfHistory proto";
         return;
     }
 
@@ -114,7 +114,7 @@
 {
     struct statvfs buf;
     if (statvfs(userdata_path.c_str(), &buf) != 0) {
-        PLOG_TO(SYSTEM, WARNING) << "Failed to get userdata info";
+        PLOG(WARNING) << "Failed to get userdata info";
         return;
     }
 
@@ -328,12 +328,12 @@
 void health_storage_info_t::report() {
     auto ret = mHealth->getStorageInfo([this](auto result, const auto& halInfos) {
         if (result == Result::NOT_SUPPORTED) {
-            LOG_TO(SYSTEM, DEBUG) << "getStorageInfo is not supported on health HAL.";
+            LOG(DEBUG) << "getStorageInfo is not supported on health HAL.";
             return;
         }
         if (result != Result::SUCCESS || halInfos.size() == 0) {
-            LOG_TO(SYSTEM, ERROR) << "getStorageInfo failed with result " << toString(result)
-                                  << " and size " << halInfos.size();
+            LOG(ERROR) << "getStorageInfo failed with result " << toString(result) << " and size "
+                       << halInfos.size();
             return;
         }
         set_values_from_hal_storage_info(halInfos[0]);
@@ -341,7 +341,7 @@
     });
 
     if (!ret.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "getStorageInfo failed with " << ret.description();
+        LOG(ERROR) << "getStorageInfo failed with " << ret.description();
     }
 }
 
diff --git a/storaged/storaged_uid_monitor.cpp b/storaged/storaged_uid_monitor.cpp
index 55380ba..f47bf72 100644
--- a/storaged/storaged_uid_monitor.cpp
+++ b/storaged/storaged_uid_monitor.cpp
@@ -71,8 +71,7 @@
         !ParseUint(fields[8],  &io[BACKGROUND].write_bytes) ||
         !ParseUint(fields[9],  &io[FOREGROUND].fsync) ||
         !ParseUint(fields[10], &io[BACKGROUND].fsync)) {
-        LOG_TO(SYSTEM, WARNING) << "Invalid uid I/O stats: \""
-                                << s << "\"";
+        LOG(WARNING) << "Invalid uid I/O stats: \"" << s << "\"";
         return false;
     }
     return true;
@@ -95,8 +94,7 @@
         !ParseUint(fields[size - 3], &io[BACKGROUND].write_bytes) ||
         !ParseUint(fields[size - 2], &io[FOREGROUND].fsync) ||
         !ParseUint(fields[size - 1], &io[BACKGROUND].fsync)) {
-        LOG_TO(SYSTEM, WARNING) << "Invalid task I/O stats: \""
-                                << s << "\"";
+        LOG(WARNING) << "Invalid task I/O stats: \"" << s << "\"";
         return false;
     }
     comm = Join(std::vector<std::string>(
@@ -123,13 +121,13 @@
 {
     sp<IServiceManager> sm = defaultServiceManager();
     if (sm == NULL) {
-        LOG_TO(SYSTEM, ERROR) << "defaultServiceManager failed";
+        LOG(ERROR) << "defaultServiceManager failed";
         return;
     }
 
     sp<IBinder> binder = sm->getService(String16("package_native"));
     if (binder == NULL) {
-        LOG_TO(SYSTEM, ERROR) << "getService package_native failed";
+        LOG(ERROR) << "getService package_native failed";
         return;
     }
 
@@ -137,8 +135,7 @@
     std::vector<std::string> names;
     binder::Status status = package_mgr->getNamesForUids(uids, &names);
     if (!status.isOk()) {
-        LOG_TO(SYSTEM, ERROR) << "package_native::getNamesForUids failed: "
-                              << status.exceptionMessage();
+        LOG(ERROR) << "package_native::getNamesForUids failed: " << status.exceptionMessage();
         return;
     }
 
@@ -158,7 +155,7 @@
     std::unordered_map<uint32_t, uid_info> uid_io_stats;
     std::string buffer;
     if (!ReadFileToString(UID_IO_STATS_PATH, &buffer)) {
-        PLOG_TO(SYSTEM, ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed";
+        PLOG(ERROR) << UID_IO_STATS_PATH << ": ReadFileToString failed";
         return uid_io_stats;
     }