comment mem_log to fix segment fault

runtime/src/global_request_scheduler.c

@@ -49,9 +49,9 @@ global_request_scheduler_add(struct sandbox_request *sandbox_request)
 {
 	uint64_t now = __getcycles();
 	uint64_t arrive_time = now - system_start_timestamp;
-	mem_log("time %lu request id:%d arrived, name:%s remaining_slack %lu now %lu, sys_start %lu \n", 
-		arrive_time, sandbox_request->id, sandbox_request->module->name, 
-		sandbox_request->remaining_slack, now, system_start_timestamp);	
+	//mem_log("time %lu request id:%d arrived, name:%s remaining_slack %lu now %lu, sys_start %lu \n", 
+	//	arrive_time, sandbox_request->id, sandbox_request->module->name, 
+	//	sandbox_request->remaining_slack, now, system_start_timestamp);	
 	assert(sandbox_request != NULL);
 	return global_request_scheduler.add_fn(sandbox_request);
 }