Re: [PATCH io_uring-7.1 v5 0/5] BPF controlled io_uring

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

On 2/11/26 15:24, Jens Axboe wrote:
> On 2/11/26 7:32 AM, Pavel Begunkov wrote:
...
>> It might need more specialised kfuncs in the future, but the core
>> functionality is implemented with just two simple functions. One
>> returns region memory, which gives BPF access to CQ/SQ/etc. And
>> the second is for submitting requests. It's also given a structure
>> as an argument, which is used to pass waiting parameters.
>>
>> It showed good numbers in a test that sequentially executes N nop
>> requests, where BPF was more than twice as fast than a 2-nop
>> request link implementation.
>>
>> I've got ideas on how the user space part while writing toy programs,
>> mostly about simplifying life to BPF writers, but I want to turn it
>> into something more cohesive before posting.
> 
> This looks nifty. Do you have a repo on the liburing side with some
> examples to play with?

Nope, it's all in a pretty dirty state yet. The selftest is pretty
good in that regard, it show cases a fixed QD workload. It's easy
to convert it to reads, and that works well, but I guess I need to
add something to show how to use the memory region to pass
parameters, e.g. iovs to readv reqs.

-- 
Pavel Begunkov