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Date: Wed, 9 Oct 2024 11:19:50 -0600
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Subject: Re: [PATCH v1 00/15] io_uring zero copy rx
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To: Mina Almasry <almasrymina@google.com>, David Wei <dw@davidwei.uk>
Cc: io-uring@vger.kernel.org, netdev@vger.kernel.org,
 Jens Axboe <axboe@kernel.dk>, Pavel Begunkov <asml.silence@gmail.com>,
 Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
 "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>,
 Jesper Dangaard Brouer <hawk@kernel.org>
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 <CAHS8izOv9cB60oUbxz_52BMGi7T4_u9rzTOCb23LGvZOX0QXqg@mail.gmail.com>
From: David Ahern <dsahern@kernel.org>
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On 10/9/24 10:55 AM, Mina Almasry wrote:
> 
> I've been thinking about this a bit, and I hope this feedback isn't
> too late, but I think your work may be useful for users not using
> io_uring. I.e. zero copy to host memory that is not dependent on page
> aligned MSS sizing. I.e. AF_XDP zerocopy but using the TCP stack.

I disagree with this request; AF_XDP by definition is bypassing the
kernel stack.