reorder the config functions. add comments for st to support 100k threads, use MALLOC_STACK macro.

@@ -283,7 +283,7 @@ install-api: install
 	@sed -i "s|^ROOT=.*|ROOT=\"\$(SRS_PREFIX)\"|g" \$(__REAL_INSTALL)/etc/init.d/srs-api
 	@echo ""
 	@echo "api installed, to link and start api:"
-	@echo "     sudo ln -sf /usr/local/srs/etc/init.d/srs-api /etc/init.d/srs-api"
+	@echo "     sudo ln -sf \$(SRS_PREFIX)/etc/init.d/srs-api /etc/init.d/srs-api"
 	@echo "     /etc/init.d/srs-api start"
 	@echo "     http://\$(shell bash auto/local_ip.sh):8085"
 	@echo "@see: https://github.com/winlinvip/simple-rtmp-server/wiki/LinuxService"
@@ -306,7 +306,7 @@ install:
 	@sed -i "s|^ROOT=.*|ROOT=\"\$(SRS_PREFIX)\"|g" \$(__REAL_INSTALL)/etc/init.d/srs
 	@echo ""
 	@echo "srs installed, to link and start srs:"
-	@echo "     sudo ln -sf /usr/local/srs/etc/init.d/srs /etc/init.d/srs"
+	@echo "     sudo ln -sf \$(SRS_PREFIX)/etc/init.d/srs /etc/init.d/srs"
 	@echo "     /etc/init.d/srs start"
 	@echo "@see: https://github.com/winlinvip/simple-rtmp-server/wiki/LinuxService"
 

@@ -2746,58 +2746,58 @@ string SrsConfig::get_ingest_input_url(SrsConfDirective* ingest)
     return conf->arg0();
 }
 
-string SrsConfig::get_log_file()
+bool SrsConfig::get_log_tank_file()
 {
     srs_assert(root);
     
-    SrsConfDirective* conf = root->get("srs_log_file");
-    if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_LOG_FILE;
+    SrsConfDirective* conf = root->get("srs_log_tank");
+    if (conf && conf->arg0() == SRS_CONF_DEFAULT_LOG_TANK_CONSOLE) {
+        return false;
     }
     
-    return conf->arg0();
-}
-
-bool SrsConfig::get_ffmpeg_log_enabled()
-{
-    string log = get_ffmpeg_log_dir();
-    return log != SRS_CONSTS_NULL_FILE;
+    return true;
 }
 
-string SrsConfig::get_ffmpeg_log_dir()
+string SrsConfig::get_log_level()
 {
     srs_assert(root);
     
-    SrsConfDirective* conf = root->get("ff_log_dir");
+    SrsConfDirective* conf = root->get("srs_log_level");
     if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_FF_LOG_DIR;
+        return SRS_CONF_DEFAULT_LOG_LEVEL;
     }
     
     return conf->arg0();
 }
 
-string SrsConfig::get_log_level()
+string SrsConfig::get_log_file()
 {
     srs_assert(root);
     
-    SrsConfDirective* conf = root->get("srs_log_level");
+    SrsConfDirective* conf = root->get("srs_log_file");
     if (!conf || conf->arg0().empty()) {
-        return SRS_CONF_DEFAULT_LOG_LEVEL;
+        return SRS_CONF_DEFAULT_LOG_FILE;
     }
     
     return conf->arg0();
 }
 
-bool SrsConfig::get_log_tank_file()
+bool SrsConfig::get_ffmpeg_log_enabled()
+{
+    string log = get_ffmpeg_log_dir();
+    return log != SRS_CONSTS_NULL_FILE;
+}
+
+string SrsConfig::get_ffmpeg_log_dir()
 {
     srs_assert(root);
     
-    SrsConfDirective* conf = root->get("srs_log_tank");
-    if (conf && conf->arg0() == SRS_CONF_DEFAULT_LOG_TANK_CONSOLE) {
-        return false;
+    SrsConfDirective* conf = root->get("ff_log_dir");
+    if (!conf || conf->arg0().empty()) {
+        return SRS_CONF_DEFAULT_FF_LOG_DIR;
     }
     
-    return true;
+    return conf->arg0();
 }
 
 SrsConfDirective* SrsConfig::get_hls(string vhost)

@@ -545,6 +545,8 @@ int SrsServer::initialize_st()
     }
     srs_verbose("st_set_eventsys use linux epoll success");
     
+    // @remark, st alloc segment use mmap, which only support 32757 threads,
+    // if need to support more, for instance, 100k threads, define the macro MALLOC_STACK.
     if(st_init() != 0){
         ret = ERROR_ST_INITIALIZE;
         srs_error("st_init failed. ret=%d", ret);