netdev - Re: [PATCH net-next v2] ethtool: add netlink based get rxfh support

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Date:   Thu, 10 Nov 2022 16:08:04 -0600
From:   "Samudrala, Sridhar" <sridhar.samudrala@...el.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "Mogilappagari, Sudheer" <sudheer.mogilappagari@...el.com>
CC:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "mkubecek@...e.cz" <mkubecek@...e.cz>,
        "andrew@...n.ch" <andrew@...n.ch>,
        "corbet@....net" <corbet@....net>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>
Subject: Re: [PATCH net-next v2] ethtool: add netlink based get rxfh support

On 11/9/2022 6:46 PM, Jakub Kicinski wrote:
> On Thu, 10 Nov 2022 00:26:23 +0000 Mogilappagari, Sudheer wrote:
>>> Can we describe in more detail which commands are reimplemented?
>>> Otherwise calling the command RXFH makes little sense.
>>> We may be better of using RSS in the name in the first place.
>> This is the ethtool command being reimplemented.
>> ethtool -x|--show-rxfh-indir DEVNAME   Show Rx flow hash indirection table and/or RSS hash key
>>          [ context %d ]
>>
>> Picked RXFH based on existing function names and ethtool_rxfh
>> structure. If it needs to change, how about RSS_CTX or just RSS ?
> I vote for just RSS.

Can we use QGRP as a prefix to indicate that these are per-queue group parameters
and not restricted to RSS related parameters?

   QGRP_CONTEXT
   QGRP_RSS_HFUNC
   QGRP_RSS_KEY
   QGRP_RSS_INDIR_TABLE

In future, we would like to add per-queue group parameters like
   QGRP_INLINE_FLOW_STEERING (Round robin flow steering of TCP flows)

Thanks
Sridhar