netdev - Re: [PATCH net-next] virtio_net: Increase RSS max key size to match NETDEV_RSS_KEY

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Message-ID: <20260122085253.33b93921@kernel.org>
Date: Thu, 22 Jan 2026 08:52:53 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: Eric Dumazet <edumazet@...gle.com>
Cc: Srujana Challa <schalla@...vell.com>, Willem de Bruijn
 <willemb@...gle.com>, netdev@...r.kernel.org,
 virtualization@...ts.linux.dev, pabeni@...hat.com, mst@...hat.com,
 jasowang@...hat.com, xuanzhuo@...ux.alibaba.com, eperezma@...hat.com,
 andrew+netdev@...n.ch, davem@...emloft.net, ndabilpuram@...vell.com, Willem
 de Bruijn <willemdebruijn.kernel@...il.com>
Subject: Re: [PATCH net-next] virtio_net: Increase RSS max key size to match
 NETDEV_RSS_KEY_LEN

On Thu, 22 Jan 2026 17:13:55 +0100 Eric Dumazet wrote:
> > Willem, WDYT? Is there a reason to keep the core key small?
> > Or deprecate netdev_rss_key_fill()?  
> 
> What do you mean by deprecating it ?
> 
> One of the ideas was to make sure multiple NIC would share the same key,
> for some bonding setups.
> 
> commit 960fb622f85180f36d3aff82af53e2be3db2f888    net: provide a per
> host RSS key generic infrastructure

Just wanted to put that option on the table, it wasn't clear to me what
the exact use case for the sysfs file was. Good to know that someone
cares :) thanks for the reference!