linux-kernel - Re: [PATCH net] xsk: respect the offsets when copying frags

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Message-ID: <aAj8DfHJ_XZxrDSJ@mini-arch>
Date: Wed, 23 Apr 2025 07:41:17 -0700
From: Stanislav Fomichev <stfomichev@...il.com>
To: Bui Quang Minh <minhquangbui99@...il.com>
Cc: netdev@...r.kernel.org, Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	"David S. Miller" <davem@...emloft.net>,
	Jakub Kicinski <kuba@...nel.org>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
	Alexander Lobakin <aleksander.lobakin@...el.com>,
	bpf@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net] xsk: respect the offsets when copying frags

On 04/23, Bui Quang Minh wrote:
> Add the missing offsets when copying frags in xdp_copy_frags_from_zc().

Can you please share more about how you've hit this problem?
I don't see the caller of this function (xdp_build_skb_from_zc)
being used at all.

Alexander, do you have plans to use it? Or should we remove it for now?