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    SubjectRe: [Intel-wired-lan] [PATCH net-next RESENT v3] ethtool: ice: Support for RSS settings to GTP from ethtool
    Hi Harald-san

    I apologize for the delay in making further progress on this
    patch.(I'm three months late...

    > There are many different GTPv2C messages

    Thank you for your assistance in explaining GTPC:)

    Thanks,
    Takeru

    2024年1月30日(火) 19:15 Harald Welte <laforge@gnumonks.org>:
    >
    > hi Marcin,
    >
    > Disclaimer: I have no understanding of the proposed implementation here, just commenting
    > on this from a 3GPP protocol architecture point of view.
    >
    > On Tue, Jan 30, 2024 at 10:59:40AM +0100, Marcin Szycik wrote:
    > > >> gtpc(4|6) doesn't include TEID, so what is its purpose?
    > > > In GTPC communication, there is no TEID in the CSR (Create Session Request).
    > > > Therefore, there are cases of GTPC that do not include TEID.
    > >
    > > The way I understand it now, this patch (and the ethtool one) adds hashing on
    > > TEID field in GTP* headers. So I wanted to ask why do we have a case (gtpc(4|6))
    > > that doesn't include TEID? Do we hash on other fields in this header?
    >
    > There are many differen GTPv2C messages, most of which contain a TEID. So it does
    > in general still make sense to be able to use RSS for all those other messages.
    >
    > The CSR (Create Session Request) will not be able to benfit from it, but
    > it's just the first message initiating a dialogue between two elements
    > (think of it like a TCP SYN). All the follow-up messages in that
    > dialogue contain TEIDs and hence can benefit from RSS.
    >
    > --
    > - Harald Welte <laforge@gnumonks.org> https://laforge.gnumonks.org/
    > ============================================================================
    > "Privacy in residential applications is a desirable marketing option."
    > (ETSI EN 300 175-7 Ch. A6)

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