Index: main/cdr.c
===================================================================
--- main/cdr.c	(revision 236182)
+++ main/cdr.c	(working copy)
@@ -63,10 +63,10 @@
 	char name[20];
 	char desc[80];
 	ast_cdrbe be;
-	AST_LIST_ENTRY(ast_cdr_beitem) list;
+	AST_RWLIST_ENTRY(ast_cdr_beitem) list;
 };
 
-static AST_LIST_HEAD_STATIC(be_list, ast_cdr_beitem);
+static AST_RWLIST_HEAD_STATIC(be_list, ast_cdr_beitem);
 
 struct ast_cdr_batch_item {
 	struct ast_cdr *cdr;
@@ -117,12 +117,12 @@
 		return -1;
 	}
 
-	AST_LIST_LOCK(&be_list);
-	AST_LIST_TRAVERSE(&be_list, i, list) {
+	AST_RWLIST_RDLOCK(&be_list);
+	AST_RWLIST_TRAVERSE(&be_list, i, list) {
 		if (!strcasecmp(name, i->name))
 			break;
 	}
-	AST_LIST_UNLOCK(&be_list);
+	AST_RWLIST_UNLOCK(&be_list);
 
 	if (i) {
 		ast_log(LOG_WARNING, "Already have a CDR backend called '%s'\n", name);
@@ -136,9 +136,9 @@
 	ast_copy_string(i->name, name, sizeof(i->name));
 	ast_copy_string(i->desc, desc, sizeof(i->desc));
 
-	AST_LIST_LOCK(&be_list);
-	AST_LIST_INSERT_HEAD(&be_list, i, list);
-	AST_LIST_UNLOCK(&be_list);
+	AST_RWLIST_WRLOCK(&be_list);
+	AST_RWLIST_INSERT_HEAD(&be_list, i, list);
+	AST_RWLIST_UNLOCK(&be_list);
 
 	return 0;
 }
@@ -148,18 +148,18 @@
 {
 	struct ast_cdr_beitem *i = NULL;
 
-	AST_LIST_LOCK(&be_list);
-	AST_LIST_TRAVERSE_SAFE_BEGIN(&be_list, i, list) {
+	AST_RWLIST_WRLOCK(&be_list);
+	AST_RWLIST_TRAVERSE_SAFE_BEGIN(&be_list, i, list) {
 		if (!strcasecmp(name, i->name)) {
-			AST_LIST_REMOVE_CURRENT(&be_list, list);
+			AST_RWLIST_REMOVE_CURRENT(&be_list, list);
 			if (option_verbose > 1)
 				ast_verbose(VERBOSE_PREFIX_2 "Unregistered '%s' CDR backend\n", name);
 			free(i);
 			break;
 		}
 	}
-	AST_LIST_TRAVERSE_SAFE_END;
-	AST_LIST_UNLOCK(&be_list);
+	AST_RWLIST_TRAVERSE_SAFE_END;
+	AST_RWLIST_UNLOCK(&be_list);
 }
 
 int ast_cdr_isset_unanswered(void)
@@ -1057,11 +1057,11 @@
 		ast_set_flag(cdr, AST_CDR_FLAG_POSTED);
 		if (ast_test_flag(cdr, AST_CDR_FLAG_POST_DISABLED))
 			continue;
-		AST_LIST_LOCK(&be_list);
-		AST_LIST_TRAVERSE(&be_list, i, list) {
+		AST_RWLIST_RDLOCK(&be_list);
+		AST_RWLIST_TRAVERSE(&be_list, i, list) {
 			i->be(cdr);
 		}
-		AST_LIST_UNLOCK(&be_list);
+		AST_RWLIST_UNLOCK(&be_list);
 	}
 }
 
@@ -1345,11 +1345,11 @@
 			ast_cli(fd, "CDR maximum batch time: %d second%s\n", batchtime, (batchtime != 1) ? "s" : "");
 			ast_cli(fd, "CDR next scheduled batch processing time: %ld second%s\n", nextbatchtime, (nextbatchtime != 1) ? "s" : "");
 		}
-		AST_LIST_LOCK(&be_list);
-		AST_LIST_TRAVERSE(&be_list, beitem, list) {
+		AST_RWLIST_RDLOCK(&be_list);
+		AST_RWLIST_TRAVERSE(&be_list, beitem, list) {
 			ast_cli(fd, "CDR registered backend: %s\n", beitem->name);
 		}
-		AST_LIST_UNLOCK(&be_list);
+		AST_RWLIST_UNLOCK(&be_list);
 	}
 
 	return 0;
Index: main/channel.c
===================================================================
--- main/channel.c	(revision 236182)
+++ main/channel.c	(working copy)
@@ -86,6 +86,10 @@
 AST_THREADSTORAGE(state2str_threadbuf, state2str_threadbuf_init);
 #define STATE2STR_BUFSIZE   32
 
+#ifdef DEBUG_THREADS
+AST_THREADSTORAGE(last_exceptionally, last_exceptionally_init);
+#endif
+
 /*! Default amount of time to use when emulating a digit as a begin and end 
  *  100ms */
 #define AST_DEFAULT_EMULATE_DTMF_DURATION 100
@@ -951,7 +955,25 @@
 	}
 
 	if ((queued_voice_frames + new_voice_frames) > 96) {
+#ifdef DEBUG_THREADS
+		time_t *last_time = ast_threadstorage_get(&last_exceptionally, sizeof(time_t));
+#endif
 		ast_log(LOG_WARNING, "Exceptionally long voice queue length queuing to %s\n", chan->name);
+#ifdef DEBUG_THREADS
+		if (last_time && *last_time != time(NULL)) {
+			FILE *f = tmpfile();
+			if (f) {
+				char buf[1024];
+				ast_cli_command(fileno(f), "core show locks");
+				lseek(fileno(f), 0, SEEK_SET);
+				while (fgets(buf, sizeof(buf), f)) {
+					ast_log(LOG_WARNING, "%s", buf);
+				}
+				*last_time = time(NULL);
+				fclose(f);
+			}
+		}
+#endif
 		while ((f = AST_LIST_REMOVE_HEAD(&frames, frame_list))) {
 			ast_frfree(f);
 		}
Index: main/pbx.c
===================================================================
--- main/pbx.c	(revision 236182)
+++ main/pbx.c	(working copy)
@@ -5487,13 +5487,21 @@
 {
 	char *args;
 	struct ast_flags flags = { 0 };
+	int autoservice = 0;
 
 	if (!ast_strlen_zero(data)) {
 		args = ast_strdupa(data);
 		ast_app_parse_options(resetcdr_opts, &flags, NULL, args);
 	}
 
+	if (ast_test_flag(&flags, AST_CDR_FLAG_POSTED) && !ast_check_hangup(chan)) {
+		ast_autoservice_start(chan);
+		autoservice = 1;
+	}
 	ast_cdr_reset(chan->cdr, &flags);
+	if (autoservice) {
+		ast_autoservice_stop(chan);
+	}
 
 	return 0;
 }