For a 32 bit image using either type of large file support [ man lfcompile ] or
[ man lfcompile64 ], the asynchronous I/O cancel operation [ man aio_cancel ]
will return EOVERFLOW for a large file of size greater or equal to 2 GB.
The asynchronous I/O cancel does not fail for a small file of size less than 2GB.
No problem for a 64 bit image.