netdev - Re: [PATCH net-next 2/4] net: ipv4: Add a sysctl to set multipath hash seed

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Message-ID: <87o78i8dfr.fsf@nvidia.com>
Date: Mon, 3 Jun 2024 13:37:02 +0200
From: Petr Machata <petrm@...dia.com>
To: Petr Machata <petrm@...dia.com>
CC: Jakub Kicinski <kuba@...nel.org>, "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	<netdev@...r.kernel.org>, Ido Schimmel <idosch@...dia.com>, David Ahern
	<dsahern@...nel.org>, Jonathan Corbet <corbet@....net>,
	<linux-doc@...r.kernel.org>, Simon Horman <horms@...nel.org>
Subject: Re: [PATCH net-next 2/4] net: ipv4: Add a sysctl to set multipath
 hash seed


Petr Machata <petrm@...dia.com> writes:

> Jakub Kicinski <kuba@...nel.org> writes:
>
>> On Wed, 29 May 2024 13:18:42 +0200 Petr Machata wrote:
>>> +fib_multipath_hash_seed - UNSIGNED INTEGER
>>> +	The seed value used when calculating hash for multipath routes. Applies
>>
>> nits..
>>
>> For RSS we call it key rather than seed, is calling it seed well
>> established for ECMP?
>>
>> Can we also call out that hashing implementation is not well defined?
>
> As others note, this seems to be industry nomenclature, so I'll keep it.

I meant the "seed" name, I'll mention the algorithm is undefined and
doesn't constitute an ABI.