netdev - Re: [PATCH RFC net-next 00/11] udp gso

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Message-ID: <CAF=yD-J154R6=P1JjfWP4HKYdPm4zdH5tDxQBavuPoL5cEfxSA@mail.gmail.com>
Date:   Wed, 18 Apr 2018 10:28:56 -0400
From:   Willem de Bruijn <willemdebruijn.kernel@...il.com>
To:     Sowmini Varadhan <sowmini.varadhan@...cle.com>
Cc:     "Samudrala, Sridhar" <sridhar.samudrala@...el.com>,
        Network Development <netdev@...r.kernel.org>,
        Willem de Bruijn <willemb@...gle.com>
Subject: Re: [PATCH RFC net-next 00/11] udp gso

On Wed, Apr 18, 2018 at 9:59 AM, Willem de Bruijn
<willemdebruijn.kernel@...il.com> wrote:
>> One thing that was not clear to me about the API: shouldn't UDP_SEGMENT
>> just be automatically determined in the stack from the pmtu? Whats
>> the motivation for the socket option for this? also AIUI this can be
>> either a per-socket or a per-packet option?

I forgot to respond to the last point: yes, it is set either as a setsockopt or
passed as a cmsg for a given send call.

Especially when using unconnected sockets to communicate with many
clients, it is likely that this value will vary per call.