On Wed, Jun 14, 2017 at 09:53:05AM -0600, Jens Axboe wrote: > So how about we just call it "write_hint"? It sounds mostly like a > naming issue to me, as you would then map that to some specific stream > in your driver. You're free to do that right now. They are all flags, > it's just packed as a value to not waste too much space. I think what Martin wants (or at least what I'd want him to want) is to define a few REQ_* bits that mirror the RWF bits, use that to transfer the information down the stack, and then only translate it to stream ids in the driver.