Re: [RFC 0/4] open/accept directly into io_uring fixed file table

[Jens Axboe]

On 7/7/21 5:39 AM, Pavel Begunkov wrote:
> Implement an old idea allowing open/accept io_uring requests to register
> a newly created file as a io_uring's fixed file instead of placing it
> into a task's file table. The switching is encoded in io_uring's SQEs
> by setting sqe->buf_index/file_index, so restricted to 2^16-1. Don't
> think we need more, but may be a good idea to scrap u32 somewhere
> instead.
> 
> From the net side only needs a function doing __sys_accept4_file()
> but not installing fd, see 2/4.
> 
> Only RFC for now, the new functionality is tested only for open yet.
> I hope we can remember the author of the idea to add attribution.

Pretty sure the original suggester of this as Josh, CC'ed.

-- 
Jens Axboe