On Mon, Mar 14, 2022 at 03:46:08PM +0530, Kanchan Joshi wrote: > But, after you did bio based polling, we need just the bio to poll. > iocb is a big structure (48 bytes), and if we try to place it in > struct io_uring_cmd, we will just blow up the cacheline in io_uring > (first one in io_kiocb). > So we just store that bio pointer in io_uring_cmd on submission > (please see patch 15). > And here on completion we pick that bio, and put that into this local > iocb, simply because ->iopoll needs it. > Do you see I am still missing anything here? Yes. The VFS layer interface for polling is the kiocb. Don't break it. The bio is just an implementation detail.
