linux-kernel - Re: [PATCH net-next v2] ethtool: ice: Support for RSS settings to GTP from ethtool

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Message-ID: <20231016092700.GH1501712@kernel.org>
Date:   Mon, 16 Oct 2023 11:27:00 +0200
From:   Simon Horman <horms@...nel.org>
To:     Takeru Hayasaka <hayatake396@...il.com>
Cc:     Jesse Brandeburg <jesse.brandeburg@...el.com>,
        Tony Nguyen <anthony.l.nguyen@...el.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v2] ethtool: ice: Support for RSS settings to
 GTP from ethtool

On Thu, Oct 12, 2023 at 06:01:15AM +0000, Takeru Hayasaka wrote:
> This is a patch that enables RSS functionality for GTP packets using
> ethtool.
> A user can include her TEID and make RSS work for GTP-U over IPv4 by
> doing the following:
> `ethtool -N ens3 rx-flow-hash gtpu4 sde`
> In addition to gtpu(4|6), we now support gtpc(4|6),gtpc(4|6)t,gtpu(4|6)e,
> gtpu(4|6)u, and gtpu(4|6)d.
> 
> GTP generates a flow that includes an ID called TEID to identify the
> tunnel. This tunnel is created for each UE (User Equipment).
> By performing RSS based on this flow, it is possible to apply RSS for
> each communication unit from the UE.
> Without this, RSS would only be effective within the range of IP
> addresses.
> For instance, the PGW can only perform RSS within the IP range of the
> SGW.
> problematic from a load distribution perspective, especially if there's
> a bias in the terminals connected to a particular base station.
> This case can be solved by using this patch
> 
> Signed-off-by: Takeru Hayasaka <hayatake396@...il.com>
> ---
> Added commit messages and options based on reviews

Thanks Hayasaka-san,

Overall this looks good to me. And I see that the review of v1
has been addressed - by adding information about the need for
this to the commit message.

Reviewed-by: Simon Horman <horms@...nel.org>