This commit at least doubles the maximum value for
completion_nsec. This helps in special cases where one wants/needs to
emulate an extremely slow I/O (for example to spot bugs).
Signed-off-by: NPaolo Valente <paolo.valente@unimore.it>
Signed-off-by: NArianna Avanzini <avanzini@google.com>
Signed-off-by: NJens Axboe <axboe@fb.com>