Re: [PATCH 6/8] io_uring/net: support multishot for send

Dylan Yudaken
2024-02-26T10:47:13Z

On Sun, Feb 25, 2024 at 12:46 AM Jens Axboe <axboe@kernel.dk> wrote:
>
> This works very much like the receive side, except for sends. The idea
> is that an application can fill outgoing buffers in a provided buffer
> group, and then arm a single send that will service them all. For now
> this variant just terminates when we are out of buffers to send, and
> hence the application needs to re-arm it if IORING_CQE_F_MORE isn't
> set, as per usual for multishot requests.
>

This feels to me a lot like just using OP_SEND with MSG_WAITALL as
described, unless I'm missing something?

I actually could imagine it being useful for the previous patches' use
case of queuing up sends and keeping ordering,
and I think the API is more obvious (rather than the second CQE
sending the first CQE's data). So maybe it's worth only
keeping one approach?