netdev - RE: [Intel-wired-lan] [PATCH bpf-next 3/6] i40e: remove unnecessary sw

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Message-ID: <5fa9ab136176d_8c0e208cd@john-XPS-13-9370.notmuch>
Date:   Mon, 09 Nov 2020 12:48:19 -0800
From:   John Fastabend <john.fastabend@...il.com>
To:     Magnus Karlsson <magnus.karlsson@...il.com>,
        magnus.karlsson@...el.com, bjorn.topel@...el.com, ast@...nel.org,
        daniel@...earbox.net, netdev@...r.kernel.org,
        jonathan.lemon@...il.com
Cc:     maciejromanfijalkowski@...il.com, intel-wired-lan@...ts.osuosl.org,
        bpf@...r.kernel.org
Subject: RE: [Intel-wired-lan] [PATCH bpf-next 3/6] i40e: remove unnecessary
 sw_ring access from xsk Tx

Magnus Karlsson wrote:
> From: Magnus Karlsson <magnus.karlsson@...el.com>
> 
> Remove the unnecessary access to the software ring for the AF_XDP
> zero-copy driver. This was used to record the length of the packet so
> that the driver Tx completion code could sum this up to produce the
> total bytes sent. This is now performed during the transmission of the
> packet, so no need to record this in the software ring.
> 
> Signed-off-by: Magnus Karlsson <magnus.karlsson@...el.com>
> ---

Acked-by: John Fastabend <john.fastabend@...il.com