On Fri, Jun 16, 2017 at 12:44:09PM -0400, Martin K. Petersen wrote: > It seems like an overkill to have different fcntls for different > hints. And since we are expecting more, maybe these should be > F_{GET,SET}_HINT and then the individual flags can be > WRITE_LIFETIME_FOOBAR? That's what I was trying to explain earlier - have F_{GET,SET}_HINT ake a u16 (or maybe even a u32 or u64 with the remainder reserved) and then take 3 bits for the write lifetime. Which btw means we'd have another 3 possible values left if we encode is as a value instead of as bits.