linux-kernel - Re: [PATCH net-next v4 12/19] xdp: add generic xdp_build_skb_from

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Message-ID: <87wmh7wfmf.fsf@toke.dk>
Date: Wed, 13 Nov 2024 12:13:44 +0100
From: Toke Høiland-Jørgensen <toke@...hat.com>
To: Alexander Lobakin <aleksander.lobakin@...el.com>, "David S. Miller"
 <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski
 <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: Alexander Lobakin <aleksander.lobakin@...el.com>, Alexei Starovoitov
 <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>, John Fastabend
 <john.fastabend@...il.com>, Andrii Nakryiko <andrii@...nel.org>, Maciej
 Fijalkowski <maciej.fijalkowski@...el.com>, Stanislav Fomichev
 <sdf@...ichev.me>, Magnus Karlsson <magnus.karlsson@...el.com>,
 nex.sw.ncis.osdt.itp.upstreaming@...el.com, bpf@...r.kernel.org,
 netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next v4 12/19] xdp: add generic
 xdp_build_skb_from_buff()

Alexander Lobakin <aleksander.lobakin@...el.com> writes:

> The code which builds an skb from an &xdp_buff keeps multiplying itself
> around the drivers with almost no changes. Let's try to stop that by
> adding a generic function.
> Unlike __xdp_build_skb_from_frame(), always allocate an skbuff head
> using napi_build_skb() and make use of the available xdp_rxq pointer to
> assign the Rx queue index. In case of PP-backed buffer, mark the skb to
> be recycled, as every PP user's been switched to recycle skbs.
>
> Signed-off-by: Alexander Lobakin <aleksander.lobakin@...el.com>

Reviewed-by: Toke Høiland-Jørgensen <toke@...hat.com>