diff --git a/app/nginx-1.11.10/src/core/ngx_connection.c b/app/nginx-1.11.10/src/core/ngx_connection.c
index cdc2e18c..6b7d9644 100644
--- a/app/nginx-1.11.10/src/core/ngx_connection.c
+++ b/app/nginx-1.11.10/src/core/ngx_connection.c
@@ -22,7 +22,7 @@ extern int is_fstack_fd(int sockfd);
 static ngx_inline int
 ngx_ff_skip_listening_socket(ngx_cycle_t *cycle, const ngx_listening_t *ls, int *type)
 {
-    if (ngx_process <= NGX_PROCESS_MASTER) {
+    if (ngx_ff_process == NGX_FF_PROCESS_NONE) {
 
         /* process master,  kernel network stack*/
         if (!ls->belong_to_host) {
@@ -32,7 +32,7 @@ ngx_ff_skip_listening_socket(ngx_cycle_t *cycle, const ngx_listening_t *ls, int
                 return 1;
             }
         }
-    } else if (NGX_PROCESS_WORKER == ngx_process) {
+    } else {
         /* process worker, fstack */
         if (ls->belong_to_host) {
             return 1;
@@ -45,11 +45,6 @@ ngx_ff_skip_listening_socket(ngx_cycle_t *cycle, const ngx_listening_t *ls, int
         if(type) {
             *type |= SOCK_FSTACK;
         }
-    } else {
-        ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
-                            "unexpected process type: %d, ignored",
-                            ngx_process);
-        exit(1);
     }
 
     return 0;
diff --git a/app/nginx-1.11.10/src/event/modules/ngx_kqueue_module.c b/app/nginx-1.11.10/src/event/modules/ngx_kqueue_module.c
index d6e9ab10..ae967638 100644
--- a/app/nginx-1.11.10/src/event/modules/ngx_kqueue_module.c
+++ b/app/nginx-1.11.10/src/event/modules/ngx_kqueue_module.c
@@ -128,7 +128,7 @@ ngx_kqueue_init(ngx_cycle_t *cycle, ngx_msec_t timer)
 #endif
 
 #if (NGX_HAVE_FSTACK)
-    if(ngx_process != NGX_PROCESS_WORKER) {
+    if(ngx_ff_process == NGX_FF_PROCESS_NONE) {
         return NGX_OK;
     }
 #endif
diff --git a/app/nginx-1.11.10/src/event/ngx_event.c b/app/nginx-1.11.10/src/event/ngx_event.c
index 007192f8..d161ea3a 100644
--- a/app/nginx-1.11.10/src/event/ngx_event.c
+++ b/app/nginx-1.11.10/src/event/ngx_event.c
@@ -252,10 +252,10 @@ ngx_process_events_and_timers(ngx_cycle_t *cycle)
 
 #if (NGX_HAVE_FSTACK)
     /* 
-     * NGX_PROCESS_WORKERs run on both fstack and kernel,
+     * NGX_FF_PROCESS_*s run on both fstack and kernel,
      * others ( e.g. cache manager/loader ) only run on kernel.
      */
-    if(ngx_process == NGX_PROCESS_WORKER) {
+    if(!!ngx_ff_process) {
         (void) ngx_process_events(cycle, timer, flags);
 
         /*
diff --git a/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.c b/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.c
index 1f646f96..6bbd37ba 100644
--- a/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.c
+++ b/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.c
@@ -29,6 +29,7 @@ static void ngx_cache_loader_process_handler(ngx_event_t *ev);
 
 #if (NGX_HAVE_FSTACK)
 extern int ff_mod_init(const char *conf, int proc_id, int proc_type);
+ngx_int_t     ngx_ff_process;
 #endif
 
 ngx_uint_t    ngx_process;
@@ -72,7 +73,6 @@ static ngx_log_t        ngx_exit_log;
 static ngx_open_file_t  ngx_exit_log_file;
 
 #if (NGX_HAVE_FSTACK)
-static ngx_int_t        ngx_ff_primary;
 static sem_t           *ngx_ff_worker_sem;
 #endif
 
@@ -312,6 +312,51 @@ ngx_master_process_cycle(ngx_cycle_t *cycle)
     }
 }
 
+#if (NGX_HAVE_FSTACK)
+static int
+ngx_single_process_cycle_loop(void *arg)
+{
+    ngx_uint_t  i;
+    ngx_cycle_t *cycle = (ngx_cycle_t *)arg;
+
+    //ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
+
+    ngx_process_events_and_timers(cycle);
+
+    if (ngx_terminate || ngx_quit) {
+
+        for (i = 0; cycle->modules[i]; i++) {
+            if (cycle->modules[i]->exit_process) {
+                cycle->modules[i]->exit_process(cycle);
+            }
+        }
+
+        ngx_master_process_exit(cycle);
+    }
+
+    if (ngx_reconfigure) {
+        ngx_reconfigure = 0;
+        ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reconfiguring");
+
+        cycle = ngx_init_cycle(cycle);
+        if (cycle == NULL) {
+            cycle = (ngx_cycle_t *) ngx_cycle;
+            return 0;
+        }
+
+        ngx_cycle = cycle;
+    }
+
+    if (ngx_reopen) {
+        ngx_reopen = 0;
+        ngx_log_error(NGX_LOG_NOTICE, cycle->log, 0, "reopening logs");
+        ngx_reopen_files(cycle, (ngx_uid_t) -1);
+    }
+
+    return 0;
+}
+#endif
+
 void
 ngx_single_process_cycle(ngx_cycle_t *cycle)
 {
@@ -322,6 +367,36 @@ ngx_single_process_cycle(ngx_cycle_t *cycle)
         exit(2);
     }
 
+#if (NGX_HAVE_FSTACK)
+    ngx_core_conf_t  *ccf;
+    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);
+    if (ccf->fstack_conf.len == 0) {
+        ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
+                        "fstack_conf null");
+        exit(2);
+    }
+
+    ngx_ff_process = NGX_FF_PROCESS_PRIMARY;
+
+    if (ff_mod_init((const char *)ccf->fstack_conf.data, 0,
+            ngx_ff_process == NGX_FF_PROCESS_PRIMARY)) {
+        ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
+                        "ff_mod_init failed");
+        exit(2);
+    }
+
+    if (ngx_open_listening_sockets(cycle) != NGX_OK) {
+            ngx_log_error(NGX_LOG_ALERT, cycle->log, ngx_errno,
+                          "ngx_open_listening_sockets failed");
+        exit(2);
+    }
+
+    if (!ngx_test_config) {
+        ngx_configure_listening_sockets(cycle);
+    }
+
+#endif
+
     for (i = 0; cycle->modules[i]; i++) {
         if (cycle->modules[i]->init_process) {
             if (cycle->modules[i]->init_process(cycle) == NGX_ERROR) {
@@ -331,6 +406,9 @@ ngx_single_process_cycle(ngx_cycle_t *cycle)
         }
     }
 
+#if (NGX_HAVE_FSTACK)
+    ff_run(ngx_single_process_cycle_loop, (void *)cycle);
+#else
     for ( ;; ) {
         ngx_log_debug0(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "worker cycle");
 
@@ -366,6 +444,7 @@ ngx_single_process_cycle(ngx_cycle_t *cycle)
             ngx_reopen_files(cycle, (ngx_uid_t) -1);
         }
     }
+#endif
 }
 
 
@@ -1045,11 +1124,13 @@ ngx_worker_process_init(ngx_cycle_t *cycle, ngx_int_t worker)
         }
 
         if (worker == 0) {
-            ngx_ff_primary = 1;
+            ngx_ff_process = NGX_FF_PROCESS_PRIMARY;
+        } else {
+            ngx_ff_process = NGX_FF_PROCESS_SECONDARY;
         }
 
         if (ff_mod_init((const char *)ccf->fstack_conf.data, worker,
-            ngx_ff_primary)) {
+            ngx_ff_process == NGX_FF_PROCESS_PRIMARY)) {
             ngx_log_error(NGX_LOG_ALERT, cycle->log, 0,
                           "ff_mod_init failed");
             exit(2);
@@ -1186,7 +1267,7 @@ ngx_worker_process_exit(ngx_cycle_t *cycle)
     ngx_log_error(NGX_LOG_NOTICE, ngx_cycle->log, 0, "exit");
 
 #if (NGX_HAVE_FSTACK)
-    if (ngx_ff_primary) {
+    if (ngx_ff_process == NGX_FF_PROCESS_PRIMARY) {
         // wait for secondary worker processes to exit.
         ngx_msleep(500);
     }
diff --git a/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.h b/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.h
index 69495d5f..1c17be6d 100644
--- a/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.h
+++ b/app/nginx-1.11.10/src/os/unix/ngx_process_cycle.h
@@ -37,6 +37,12 @@ typedef struct {
 void ngx_master_process_cycle(ngx_cycle_t *cycle);
 void ngx_single_process_cycle(ngx_cycle_t *cycle);
 
+#if (NGX_HAVE_FSTACK)
+#define                NGX_FF_PROCESS_NONE         0
+#define                NGX_FF_PROCESS_PRIMARY      1
+#define                NGX_FF_PROCESS_SECONDARY    2
+extern ngx_int_t       ngx_ff_process;
+#endif
 
 extern ngx_uint_t      ngx_process;
 extern ngx_uint_t      ngx_worker;