Samba 4.1.9 and outstanding AIO requests

[Krishna Harathi]

With Samba 4.1.9 (Mips64, Debian Platform) we are seeing that only
two outstanding IO requests  are outstanding using Microsoft Message
Analyzer,
where as we expected to see several.

The client is Windows Server 2008 R2, and large MTU (1MB) writes are
enabled.
We used the default implementation as well as aio_posix VFS module.

Any insight into why this is so and any other tuning suggestion is
appreciated.

Thanks


Regards.
Krishna Harathi