netdev - Re: [PATCH net-next] stmmac: align RX buffers

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Message-Id: <20210614.125111.1519954686951337716.davem@davemloft.net>
Date:   Mon, 14 Jun 2021 12:51:11 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     mcroce@...ux.microsoft.com
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, peppe.cavallaro@...com,
        alexandre.torgue@...s.st.com, kuba@...nel.org, palmer@...belt.com,
        paul.walmsley@...ive.com, drew@...gleboard.org, kernel@...il.dk
Subject: Re: [PATCH net-next] stmmac: align RX buffers


But thois means the ethernet header will be misaliugned and this will kill performance on some cpus as misaligned accessed
are resolved wioth a trap handler.

Even on cpus that don't trap, the access will be slower.

Thanks.