netdev - Re: [PATCH v3] skbuff: Add MSG_MORE flag to optimize large packet transmission

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Message-ID: <e7275f92-5107-48d2-9a47-435b73c62ef4@redhat.com>
Date: Thu, 3 Jul 2025 10:48:40 +0200
From: Paolo Abeni <pabeni@...hat.com>
To: Feng Yang <yangfeng59949@....com>, davem@...emloft.net,
 edumazet@...gle.com, kuba@...nel.org, horms@...nel.org, willemb@...gle.com,
 almasrymina@...gle.com, kerneljasonxing@...il.com, ebiggers@...gle.com,
 asml.silence@...il.com, aleksander.lobakin@...el.com, stfomichev@...il.com,
 david.laight.linux@...il.com
Cc: yangfeng@...inos.cn, netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] skbuff: Add MSG_MORE flag to optimize large packet
 transmission

On 6/30/25 9:10 AM, Feng Yang wrote:
> From: Feng Yang <yangfeng@...inos.cn>
> 
> The "MSG_MORE" flag is added to improve the transmission performance of large packets.
> The improvement is more significant for TCP, while there is a slight enhancement for UDP.

I'm sorry for the conflicting input, but i fear we can't do this for
UDP: unconditionally changing the wire packet layout may break the
application, and or at very least incur in unexpected fragmentation issues.

/P