FIO_Q_COMPLETED = 0, /* completed sync */
FIO_Q_QUEUED = 1, /* queued, will complete async */
FIO_Q_BUSY = 2, /* no more room, call ->commit() */
FIO_Q_COMPLETED = 0, /* completed sync */
FIO_Q_QUEUED = 1, /* queued, will complete async */
FIO_Q_BUSY = 2, /* no more room, call ->commit() */