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    SubjectRe: [RFC 0/4] open/accept directly into io_uring fixed file table
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    On 7/7/21 4:04 PM, Josh Triplett wrote:
    > On Wed, Jul 07, 2021 at 07:07:52AM -0600, Jens Axboe wrote:
    >> 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.
    >
    > Thanks for working on this, Pavel!
    >
    > Original thread at

    Totally was thinking it was only a discussion but not an actual patch,
    and I even did comment on it! Sorry Josh, would have persuaded you to
    finish it, if I remembered that.

    > https://lore.kernel.org/io-uring/20200715004209.GA334456@localhost/T/ in
    > case that helps.
    >

    --
    Pavel Begunkov

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