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

On Wed, 11 Oct 2023 10:56:17 +0900 takeru hayasaka wrote:

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.
What I'm trying to say is that RSS based solely on IP addresses can be
problematic from a load distribution perspective, especially if
there's a bias in the terminals connected to a particular base
station.
As a reference that discusses a similar topic, please see the link
below(is not RSS, is TEID Flow):
https://docs.nvidia.com/networking-ethernet-software/cumulus-linux-56/Layer-3/Routing/Equal-Cost-Multipath-Load-Sharing/#gtp-hashing

Makes sense, thanks for the extra information. I think it would be
worth adding all of this to the commit message!

Regarding the patch - you are only adding flow types, not a new field 
(which are defined as RXH_*). If we want to hash on an extra field, 
I think we need to specify that field as well?

Thank you for your understanding.
---
Sorry! My email was blocked because it wasn't sent in plain text mode.
I've made the necessary changes and will resend it.

No worries! Additional request - in the future please prefer the
bottom-posting or interleaved style of replies:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style