以下是原代码中的说明:
// The NT cache manager can deadlock if a filesystem that is using the cache
// manager is used in a virtual disk that stores its file on a filesystem
// that is also using the cache manager, this is why we open the file with
// FILE_NO_INTERMEDIATE_BUFFERING above, however if the file is compressed
// or encrypted NT will not honor this request and cache it anyway since it
// need to store the decompressed/unencrypted data somewhere, therefor we put