Re: [PATCH] io_uring: add io_uring_enter(2) fixed file support

Jens Axboe
2022-03-03T14:41:04Z

On 3/3/22 7:36 AM, Jens Axboe wrote:
> The only potential oddity here is that the fd passed back is not a
> legitimate fd. io_uring does support poll(2) on its file descriptor, so
> that could cause some confusion even if I don't think anyone actually
> does poll(2) on io_uring.

Side note - the only implication here is that we then likely can't make
the optimized behavior the default, it has to be an IORING_SETUP_REG
flag which tells us that the application is aware of this limitation.
Though I guess close(2) might mess with that too... Hmm.

--
Jens Axboe