netdev - Re: [PATCH net-next] nfp: make RSS can be switched on/off by ethtool

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Message-ID: <20220225074809.1302cc60@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net>
Date:   Fri, 25 Feb 2022 07:48:09 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Simon Horman <simon.horman@...igine.com>
Cc:     David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
        oss-drivers@...igine.com, Yinjun Zhang <yinjun.zhang@...igine.com>,
        Louis Peens <louis.peens@...igine.com>
Subject: Re: [PATCH net-next] nfp: make RSS can be switched on/off by
 ethtool

On Fri, 25 Feb 2022 09:59:29 +0100 Simon Horman wrote:
> From: Yinjun Zhang <yinjun.zhang@...igine.com>
> 
> RSS is default on in nfp net device, and cannot be switched off
> by `ethtool -K <int> receive-hashing off`. Implement it now.

Does rxhash mean RSS or reporting of the flow hash?
User can "disable RSS" by changing the indirection table to all-0.
Currently rxhash controls copying the rxhash to the skb for the nfp.