diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index 720ec03..0406efd 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -625,17 +625,6 @@
     return fstab;
 }
 
-/* combines fstab entries passed in from device tree with
- * the ones found from fstab_path
- */
-struct fstab *fs_mgr_read_fstab_with_dt(const char *fstab_path)
-{
-    struct fstab *fstab_dt = fs_mgr_read_fstab_dt();
-    struct fstab *fstab = fs_mgr_read_fstab(fstab_path);
-
-    return in_place_merge(fstab_dt, fstab);
-}
-
 /*
  * tries to load default fstab.<hardware> file from /odm/etc, /vendor/etc
  * or /. loads the first one found and also combines fstab entries passed
@@ -658,7 +647,12 @@
         LWARNING << __FUNCTION__ << "(): failed to find device hardware name";
     }
 
-    return fs_mgr_read_fstab_with_dt(default_fstab.c_str());
+    // combines fstab entries passed in from device tree with
+    // the ones found from default_fstab file
+    struct fstab *fstab_dt = fs_mgr_read_fstab_dt();
+    struct fstab *fstab = fs_mgr_read_fstab(default_fstab.c_str());
+
+    return in_place_merge(fstab_dt, fstab);
 }
 
 void fs_mgr_free_fstab(struct fstab *fstab)
diff --git a/fs_mgr/include/fs_mgr.h b/fs_mgr/include/fs_mgr.h
index e4aeb48..4b626de 100644
--- a/fs_mgr/include/fs_mgr.h
+++ b/fs_mgr/include/fs_mgr.h
@@ -88,7 +88,6 @@
 struct fstab *fs_mgr_read_fstab_default();
 struct fstab *fs_mgr_read_fstab_dt();
 struct fstab *fs_mgr_read_fstab(const char *fstab_path);
-struct fstab *fs_mgr_read_fstab_with_dt(const char *fstab_path);
 void fs_mgr_free_fstab(struct fstab *fstab);
 
 #define FS_MGR_MNTALL_DEV_FILE_ENCRYPTED 5
diff --git a/liblog/logger_write.c b/liblog/logger_write.c
index d322c0f..84feb20 100644
--- a/liblog/logger_write.c
+++ b/liblog/logger_write.c
@@ -410,16 +410,46 @@
   if (!tag) tag = "";
 
   /* XXX: This needs to go! */
-  if ((bufID != LOG_ID_RADIO) &&
-      (!strcmp(tag, "HTC_RIL") ||
-       !strncmp(tag, "RIL", 3) || /* Any log tag with "RIL" as the prefix */
-       !strncmp(tag, "IMS", 3) || /* Any log tag with "IMS" as the prefix */
-       !strcmp(tag, "AT") || !strcmp(tag, "GSM") || !strcmp(tag, "STK") ||
-       !strcmp(tag, "CDMA") || !strcmp(tag, "PHONE") || !strcmp(tag, "SMS"))) {
-    bufID = LOG_ID_RADIO;
-    /* Inform third party apps/ril/radio.. to use Rlog or RLOG */
-    snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag);
-    tag = tmp_tag;
+  if (bufID != LOG_ID_RADIO) {
+    switch (tag[0]) {
+      case 'H':
+        if (strcmp(tag + 1, "HTC_RIL" + 1)) break;
+        goto inform;
+      case 'R':
+        /* Any log tag with "RIL" as the prefix */
+        if (strncmp(tag + 1, "RIL" + 1, strlen("RIL") - 1)) break;
+        goto inform;
+      case 'Q':
+        /* Any log tag with "QC_RIL" as the prefix */
+        if (strncmp(tag + 1, "QC_RIL" + 1, strlen("QC_RIL") - 1)) break;
+        goto inform;
+      case 'I':
+        /* Any log tag with "IMS" as the prefix */
+        if (strncmp(tag + 1, "IMS" + 1, strlen("IMS") - 1)) break;
+        goto inform;
+      case 'A':
+        if (strcmp(tag + 1, "AT" + 1)) break;
+        goto inform;
+      case 'G':
+        if (strcmp(tag + 1, "GSM" + 1)) break;
+        goto inform;
+      case 'S':
+        if (strcmp(tag + 1, "STK" + 1) && strcmp(tag + 1, "SMS" + 1)) break;
+        goto inform;
+      case 'C':
+        if (strcmp(tag + 1, "CDMA" + 1)) break;
+        goto inform;
+      case 'P':
+        if (strcmp(tag + 1, "PHONE" + 1)) break;
+      /* FALLTHRU */
+      inform:
+        bufID = LOG_ID_RADIO;
+        snprintf(tmp_tag, sizeof(tmp_tag), "use-Rlog/RLOG-%s", tag);
+        tag = tmp_tag;
+      /* FALLTHRU */
+      default:
+        break;
+    }
   }
 
 #if __BIONIC__
diff --git a/liblog/tests/liblog_benchmark.cpp b/liblog/tests/liblog_benchmark.cpp
index 3f79552..c4bf959 100644
--- a/liblog/tests/liblog_benchmark.cpp
+++ b/liblog/tests/liblog_benchmark.cpp
@@ -527,11 +527,13 @@
 /*
  *	Measure the time it takes to submit the android event logging call
  * using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
- * under light load. Expect this to be a dozen or so syscall periods (40us)
+ * under light load. Expect this to be a long path to logger to convert the
+ * unknown tag (0) into a tagname (less than 200us).
  */
 static void BM_log_event_overhead(int iters) {
   for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
     StartBenchmarkTiming();
+    // log tag number 0 is not known, nor shall it ever be known
     __android_log_btwrite(0, EVENT_TYPE_LONG, &i, sizeof(i));
     StopBenchmarkTiming();
     logd_yield();
@@ -539,6 +541,28 @@
 }
 BENCHMARK(BM_log_event_overhead);
 
+/*
+ *	Measure the time it takes to submit the android event logging call
+ * using discrete acquisition (StartBenchmarkTiming() -> StopBenchmarkTiming())
+ * under light load with a known logtag.  Expect this to be a dozen or so
+ * syscall periods (less than 40us)
+ */
+static void BM_log_event_overhead_42(int iters) {
+  for (unsigned long long i = 0; i < (unsigned)iters; ++i) {
+    StartBenchmarkTiming();
+    // In system/core/logcat/event.logtags:
+    // # These are used for testing, do not modify without updating
+    // # tests/framework-tests/src/android/util/EventLogFunctionalTest.java.
+    // # system/core/liblog/tests/liblog_benchmark.cpp
+    // # system/core/liblog/tests/liblog_test.cpp
+    // 42    answer (to life the universe etc|3)
+    __android_log_btwrite(42, EVENT_TYPE_LONG, &i, sizeof(i));
+    StopBenchmarkTiming();
+    logd_yield();
+  }
+}
+BENCHMARK(BM_log_event_overhead_42);
+
 static void BM_log_event_overhead_null(int iters) {
   set_log_null();
   BM_log_event_overhead(iters);
diff --git a/logcat/event.logtags b/logcat/event.logtags
index 909f8e2..9f05351 100644
--- a/logcat/event.logtags
+++ b/logcat/event.logtags
@@ -36,6 +36,8 @@
 
 # These are used for testing, do not modify without updating
 # tests/framework-tests/src/android/util/EventLogFunctionalTest.java.
+# system/core/liblog/tests/liblog_benchmark.cpp
+# system/core/liblog/tests/liblog_test.cpp
 42    answer (to life the universe etc|3)
 314   pi
 2718  e
diff --git a/logd/LogBuffer.cpp b/logd/LogBuffer.cpp
index 86ea6b4..0984e81 100644
--- a/logd/LogBuffer.cpp
+++ b/logd/LogBuffer.cpp
@@ -109,11 +109,11 @@
 
 LogBuffer::LogBuffer(LastLogTimes* times)
     : monotonic(android_log_clockid() == CLOCK_MONOTONIC), mTimes(*times) {
-    pthread_mutex_init(&mLogElementsLock, NULL);
+    pthread_mutex_init(&mLogElementsLock, nullptr);
 
     log_id_for_each(i) {
-        lastLoggedElements[i] = NULL;
-        droppedElements[i] = NULL;
+        lastLoggedElements[i] = nullptr;
+        droppedElements[i] = nullptr;
     }
 
     init();
@@ -196,7 +196,7 @@
         new LogBufferElement(log_id, realtime, uid, pid, tid, msg, len);
     if (log_id != LOG_ID_SECURITY) {
         int prio = ANDROID_LOG_INFO;
-        const char* tag = NULL;
+        const char* tag = nullptr;
         if (log_id == LOG_ID_EVENTS) {
             tag = tagToName(elem->getTag());
         } else {
@@ -222,24 +222,24 @@
         //
         // State Init
         //     incoming:
-        //         dropped = NULL
-        //         currentLast = NULL;
+        //         dropped = nullptr
+        //         currentLast = nullptr;
         //         elem = incoming message
         //     outgoing:
-        //         dropped = NULL -> State 0
+        //         dropped = nullptr -> State 0
         //         currentLast = copy of elem
         //         log elem
         // State 0
         //     incoming:
         //         count = 0
-        //         dropped = NULL
+        //         dropped = nullptr
         //         currentLast = copy of last message
         //         elem = incoming message
         //     outgoing: if match != DIFFERENT
         //         dropped = copy of first identical message -> State 1
         //         currentLast = reference to elem
         //     break: if match == DIFFERENT
-        //         dropped = NULL -> State 0
+        //         dropped = nullptr -> State 0
         //         delete copy of last message (incoming currentLast)
         //         currentLast = copy of elem
         //         log elem
@@ -266,7 +266,7 @@
         //             currentLast = reference to elem, sum liblog.
         //     break: if match == DIFFERENT
         //         delete dropped
-        //         dropped = NULL -> State 0
+        //         dropped = nullptr -> State 0
         //         log reference to last held-back (currentLast)
         //         currentLast = copy of elem
         //         log elem
@@ -285,7 +285,7 @@
         //         currentLast = reference to elem
         //     break: if match == DIFFERENT
         //         log dropped (chatty message)
-        //         dropped = NULL -> State 0
+        //         dropped = nullptr -> State 0
         //         log reference to last held-back (currentLast)
         //         currentLast = copy of elem
         //         log elem
@@ -350,7 +350,7 @@
             } else {           // State 1
                 delete dropped;
             }
-            droppedElements[log_id] = NULL;
+            droppedElements[log_id] = nullptr;
             log(currentLast);  // report last message in the series
         } else {               // State 0
             delete currentLast;
@@ -654,7 +654,7 @@
 // mLogElementsLock must be held when this function is called.
 //
 bool LogBuffer::prune(log_id_t id, unsigned long pruneRows, uid_t caller_uid) {
-    LogTimeEntry* oldest = NULL;
+    LogTimeEntry* oldest = nullptr;
     bool busy = false;
     bool clearAll = pruneRows == ULONG_MAX;
 
@@ -1076,9 +1076,11 @@
     return retval;
 }
 
-log_time LogBuffer::flushTo(
-    SocketClient* reader, const log_time& start, bool privileged, bool security,
-    int (*filter)(const LogBufferElement* element, void* arg), void* arg) {
+log_time LogBuffer::flushTo(SocketClient* reader, const log_time& start,
+                            pid_t* lastTid, bool privileged, bool security,
+                            int (*filter)(const LogBufferElement* element,
+                                          void* arg),
+                            void* arg) {
     LogBufferElementCollection::iterator it;
     uid_t uid = reader->getUid();
 
@@ -1107,9 +1109,6 @@
     }
 
     log_time max = start;
-    // Help detect if the valid message before is from the same source so
-    // we can differentiate chatty filter types.
-    pid_t lastTid[LOG_ID_MAX] = { 0 };
 
     for (; it != mLogElements.end(); ++it) {
         LogBufferElement* element = *it;
@@ -1137,14 +1136,17 @@
             }
         }
 
-        bool sameTid = lastTid[element->getLogId()] == element->getTid();
-        // Dropped (chatty) immediately following a valid log from the
-        // same source in the same log buffer indicates we have a
-        // multiple identical squash.  chatty that differs source
-        // is due to spam filter.  chatty to chatty of different
-        // source is also due to spam filter.
-        lastTid[element->getLogId()] =
-            (element->getDropped() && !sameTid) ? 0 : element->getTid();
+        bool sameTid = false;
+        if (lastTid) {
+            sameTid = lastTid[element->getLogId()] == element->getTid();
+            // Dropped (chatty) immediately following a valid log from the
+            // same source in the same log buffer indicates we have a
+            // multiple identical squash.  chatty that differs source
+            // is due to spam filter.  chatty to chatty of different
+            // source is also due to spam filter.
+            lastTid[element->getLogId()] =
+                (element->getDropped() && !sameTid) ? 0 : element->getTid();
+        }
 
         pthread_mutex_unlock(&mLogElementsLock);
 
diff --git a/logd/LogBuffer.h b/logd/LogBuffer.h
index fcf6b9a..19d11cb 100644
--- a/logd/LogBuffer.h
+++ b/logd/LogBuffer.h
@@ -115,11 +115,15 @@
 
     int log(log_id_t log_id, log_time realtime, uid_t uid, pid_t pid, pid_t tid,
             const char* msg, unsigned short len);
+    // lastTid is an optional context to help detect if the last previous
+    // valid message was from the same source so we can differentiate chatty
+    // filter types (identical or expired)
     log_time flushTo(SocketClient* writer, const log_time& start,
+                     pid_t* lastTid,  // &lastTid[LOG_ID_MAX] or nullptr
                      bool privileged, bool security,
                      int (*filter)(const LogBufferElement* element,
-                                   void* arg) = NULL,
-                     void* arg = NULL);
+                                   void* arg) = nullptr,
+                     void* arg = nullptr);
 
     bool clear(log_id_t id, uid_t uid = AID_ROOT);
     unsigned long getSize(log_id_t id);
diff --git a/logd/LogReader.cpp b/logd/LogReader.cpp
index 620d4d0..af19279 100644
--- a/logd/LogReader.cpp
+++ b/logd/LogReader.cpp
@@ -182,7 +182,7 @@
         } logFindStart(pid, logMask, sequence,
                        logbuf().isMonotonic() && android::isMonotonic(start));
 
-        logbuf().flushTo(cli, sequence, FlushCommand::hasReadLogs(cli),
+        logbuf().flushTo(cli, sequence, nullptr, FlushCommand::hasReadLogs(cli),
                          FlushCommand::hasSecurityLogs(cli),
                          logFindStart.callback, &logFindStart);
 
diff --git a/logd/LogTimes.cpp b/logd/LogTimes.cpp
index 04e531f..ccc550a 100644
--- a/logd/LogTimes.cpp
+++ b/logd/LogTimes.cpp
@@ -15,6 +15,7 @@
  */
 
 #include <errno.h>
+#include <string.h>
 #include <sys/prctl.h>
 
 #include <private/android_logger.h>
@@ -47,7 +48,8 @@
       mEnd(log_time(android_log_clockid())) {
     mTimeout.tv_sec = timeout / NS_PER_SEC;
     mTimeout.tv_nsec = timeout % NS_PER_SEC;
-    pthread_cond_init(&threadTriggeredCondition, NULL);
+    memset(mLastTid, 0, sizeof(mLastTid));
+    pthread_cond_init(&threadTriggeredCondition, nullptr);
     cleanSkip_Locked();
 }
 
@@ -98,7 +100,7 @@
             it++;
         }
 
-        me->mClient = NULL;
+        me->mClient = nullptr;
         reader.release(client);
     }
 
@@ -122,7 +124,7 @@
     SocketClient* client = me->mClient;
     if (!client) {
         me->error();
-        return NULL;
+        return nullptr;
     }
 
     LogBuffer& logbuf = me->mReader.logbuf();
@@ -151,12 +153,12 @@
         unlock();
 
         if (me->mTail) {
-            logbuf.flushTo(client, start, privileged, security, FilterFirstPass,
-                           me);
+            logbuf.flushTo(client, start, nullptr, privileged, security,
+                           FilterFirstPass, me);
             me->leadingDropped = true;
         }
-        start = logbuf.flushTo(client, start, privileged, security,
-                               FilterSecondPass, me);
+        start = logbuf.flushTo(client, start, me->mLastTid, privileged,
+                               security, FilterSecondPass, me);
 
         lock();
 
@@ -182,7 +184,7 @@
 
     pthread_cleanup_pop(true);
 
-    return NULL;
+    return nullptr;
 }
 
 // A first pass to count the number of elements
@@ -281,7 +283,5 @@
 }
 
 void LogTimeEntry::cleanSkip_Locked(void) {
-    for (log_id_t i = LOG_ID_MIN; i < LOG_ID_MAX; i = (log_id_t)(i + 1)) {
-        skipAhead[i] = 0;
-    }
+    memset(skipAhead, 0, sizeof(skipAhead));
 }
diff --git a/logd/LogTimes.h b/logd/LogTimes.h
index 9a3ddab..ec8252e 100644
--- a/logd/LogTimes.h
+++ b/logd/LogTimes.h
@@ -44,6 +44,7 @@
     const unsigned int mLogMask;
     const pid_t mPid;
     unsigned int skipAhead[LOG_ID_MAX];
+    pid_t mLastTid[LOG_ID_MAX];
     unsigned long mCount;
     unsigned long mTail;
     unsigned long mIndex;
diff --git a/logd/tests/logd_test.cpp b/logd/tests/logd_test.cpp
index ddff393..d0101ed 100644
--- a/logd/tests/logd_test.cpp
+++ b/logd/tests/logd_test.cpp
@@ -426,7 +426,7 @@
                     " BM_log_maximum_retry"
                     " BM_log_maximum"
                     " BM_clock_overhead"
-                    " BM_log_overhead"
+                    " BM_log_print_overhead"
                     " BM_log_latency"
                     " BM_log_delay",
                     "r")));
@@ -434,13 +434,13 @@
     char buffer[5120];
 
     static const char* benchmarks[] = {
-        "BM_log_maximum_retry ", "BM_log_maximum ", "BM_clock_overhead ",
-        "BM_log_overhead ",      "BM_log_latency ", "BM_log_delay "
+        "BM_log_maximum_retry ",  "BM_log_maximum ", "BM_clock_overhead ",
+        "BM_log_print_overhead ", "BM_log_latency ", "BM_log_delay "
     };
     static const unsigned int log_maximum_retry = 0;
     static const unsigned int log_maximum = 1;
     static const unsigned int clock_overhead = 2;
-    static const unsigned int log_overhead = 3;
+    static const unsigned int log_print_overhead = 3;
     static const unsigned int log_latency = 4;
     static const unsigned int log_delay = 5;
 
@@ -469,21 +469,23 @@
     }
 
     EXPECT_GE(200000UL, ns[log_maximum_retry]);  // 104734 user
+    EXPECT_NE(0UL, ns[log_maximum_retry]);       // failure to parse
 
     EXPECT_GE(90000UL, ns[log_maximum]);  // 46913 user
+    EXPECT_NE(0UL, ns[log_maximum]);      // failure to parse
 
     EXPECT_GE(4096UL, ns[clock_overhead]);  // 4095
+    EXPECT_NE(0UL, ns[clock_overhead]);     // failure to parse
 
-    EXPECT_GE(250000UL, ns[log_overhead]);  // 126886 user
+    EXPECT_GE(250000UL, ns[log_print_overhead]);  // 126886 user
+    EXPECT_NE(0UL, ns[log_print_overhead]);       // failure to parse
 
     EXPECT_GE(10000000UL,
               ns[log_latency]);  // 1453559 user space (background cgroup)
+    EXPECT_NE(0UL, ns[log_latency]);  // failure to parse
 
     EXPECT_GE(20000000UL, ns[log_delay]);  // 10500289 user
-
-    for (unsigned i = 0; i < arraysize(ns); ++i) {
-        EXPECT_NE(0UL, ns[i]);
-    }
+    EXPECT_NE(0UL, ns[log_delay]);         // failure to parse
 
     alloc_statistics(&buf, &len);