linux-kernel - Re: [PATCH net-next v3 1/4] net: dsa: add support for DSA rx offloading via metadata dst

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Message-ID: <20221111204059.17b8ce95@kernel.org>
Date:   Fri, 11 Nov 2022 20:40:59 -0800
From:   Jakub Kicinski <kuba@...nel.org>
To:     Vladimir Oltean <olteanv@...il.com>
Cc:     Felix Fietkau <nbd@....name>, netdev@...r.kernel.org,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v3 1/4] net: dsa: add support for DSA rx
 offloading via metadata dst

On Sat, 12 Nov 2022 01:37:14 +0200 Vladimir Oltean wrote:
> Jakub, what do you think? Refcounting or no refcounting?

I would not trust my word over Felix's.. but since you asked I'd vote
for refcounted. There's probably a handful of low level redirects
(generic XDP, TC, NFT) that can happen and steal the packet, and
keep it alive for a while. I don't think they will all necessarily
clear the dst.