On Thu, Jan 16, 2020 at 09:30:12AM -0700, Jens Axboe wrote: > On 1/16/20 9:26 AM, Stefano Garzarella wrote: > >> Since the use case is mostly single submitter, unless you're doing > >> something funky or unusual, you're not going to be needing POLLOUT ever. > > > > The case that I had in mind was with kernel side polling enabled and > > a single submitter that can use epoll() to wait free slots in the SQ > > ring. (I don't have a test, maybe I can write one...) > > Right, I think that's the only use case where it makes sense, because > you have someone else draining the sq side for you. A test case would > indeed be nice, liburing has a good arsenal of test cases and this would > be a good addition! Sure, I'll send a test to liburing for this case! Thanks, Stefano
