>> While experimenting with io_uring and liburing I seem to have hit an >> issue with registered buffers. I can't see a way that either >> io_uring_register() or liburing can return the buffer indicies >> associated with registered buffers. In addition, there is no way to > > Why would it need to return them? The indices are the index into the > array you passed in for registration. Ah this is the part I was missing. I did not know we could be assured the indices passed back were identical to those passed in. > Fio uses them, as does t/io_uring from fio. I've done lots of testing > with registered buffers, all the performance numbers done were with that > enabled (unless otherwise noted). > > But yes, a test case is always a great idea! Cool. I will go look at what the test in fio does and see if a testcase in liburing makes sense. Cheers Stephen
