netdev - Re: [PATCH bpf-next 1/3] dev: Move received_rps counter next to RPS members in softnet data

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Message-ID: <20220818200143.7d534a41@kernel.org>
Date:   Thu, 18 Aug 2022 20:01:43 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Toke Høiland-Jørgensen <toke@...hat.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org,
        bpf@...r.kernel.org
Subject: Re: [PATCH bpf-next 1/3] dev: Move received_rps counter next to RPS
 members in softnet data

On Thu, 18 Aug 2022 18:59:03 +0200 Toke Høiland-Jørgensen wrote:
> Move the received_rps counter value next to the other RPS-related members
> in softnet_data. This closes two four-byte holes in the structure, making
> room for another pointer in the first two cache lines without bumping the
> xmit struct to its own line.

What's the pointer you're making space for (which I hope will explain
why this patch is part of this otherwise bpf series)?