Re: [PATCH 0/5] io_uring: add IORING_OP_BPF for extending io_uring

[Pavel Begunkov <asml.silence@gmail.com>]

On 11/4/25 16:21, Ming Lei wrote:
> Hello,
> 
> Add IORING_OP_BPF for extending io_uring operations, follows typical cases:

BPF requests were tried long time ago and it wasn't great. Performance
for short BPF programs is not great because of io_uring request handling
overhead. And flexibility was severely lacking, so even simple use cases
were looking pretty ugly, internally, and for BPF writers as well.

I'm not so sure about your criteria, but my requirement was to at least
being able to reuse all io_uring IO handling, i.e. submitting requests,
and to wait/process completions, otherwise a lot of opportunities are
wasted. My approach from a few months back [1] controlling requests from
the outside was looking much better. At least it covered a bunch of needs
without extra changes. I was just wiring up io_uring changes I wanted
to make BPF writer lifes easier. Let me resend the bpf series with it.

It makes me wonder if they are complementary, but I'm not sure what
your use cases are and what capabilities it might need.

[1] https://lore.kernel.org/io-uring/cover.1749214572.git.asml.silence@gmail.com/

-- 
Pavel Begunkov