WIP Send additional fsyncs from secondary OSDs to primaries to prevent lockups

src/osd.cpp

@@ -184,6 +184,14 @@ void osd_t::parse_config(bool init)
         // Allow to set it to 0
         autosync_writes = config["autosync_writes"].uint64_value();
     }
+    if (!config["fsync_feedback_repeat_interval"].is_null())
+    {
+        fsync_feedback_repeat_interval = config["fsync_feedback_repeat_interval"].uint64_value();
+    }
+    if (!fsync_feedback_repeat_interval)
+    {
+        fsync_feedback_repeat_interval = 500; // ms
+    }
     if (!config["client_queue_depth"].is_null())
     {
         client_queue_depth = config["client_queue_depth"].uint64_value();