On Wed Oct 20, 2021 at 12:15 PM CEST, Pavel Begunkov wrote: > Not a canonical way, but both should work (POLLIN for CQEs). > Do you have a simple test case for us to reproduce? Hm, no, I cannot. I must have faced another bug, I was not able to produce a minimal test case and my attempt to reproduce my earlier bug in a larger test case was not succesful. One issue which remains is that attempting to use REGISTER_FILES on io_uring A with io_uring B's file descriptor returns EBADF. I saw a comment in the kernel source explaining this, but it's a bit contrived and the error case is not documented.
