Re: [GIT PULL] pipe: nonblocking rw for io_uring

[Linus Torvalds]

On Mon, Apr 24, 2023 at 2:55 PM Jens Axboe <axboe@xxxxxxxxx> wrote:
>
> I took another look at this, and the main issue is in fact splice
> confirming buffers. So I do think that we can make this work by simply
> having the non-block nature of it being passed down the ->confirm()
> callback as that's the one that'll be waiting for IO. If we have that,
> then we can disregard the pipe locking as we won't be holding it over
> IO.

Ok, that part looks fine to me.

The pipe_buf_confirm() part of the series I don't find problematic,
it's really conditional locking that I absolutely detest and has
always been a sign of problems elsewhere.

             Linus