Currently /proc/meminfo will not show the memory from module. This entry "VmallocUsed: xxx" only shows the memory in the range [VMALLOC_START, VMALLOC_END] alloced by vmalloc() ->... -> __vmalloc_node_range().
The memory which used by module is from module_alloc() -> __vmalloc_node_range(). So we will miss some memory when we calculate the total in meminfo. Thanks, Xishi Qiu