Linux kernel cuts read/write requests bigger that (2GB - 4Kb).
Warn user at the beginning, handle preparation writes and
warn about each incomplete request.
Signed-off-by: Konstantin Khlebnikov <koct9i@gmail.com>
Reported-by: "mike.merinov" <mike.merinov@gmail.com>
Link: https://code.google.com/p/ioping/issues/detail?id=21