linux-kernel - Re: [PATCH] net: ethernet: ti: am65-cpsw: Add minimal XDP support

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Date: Tue, 27 Feb 2024 00:18:44 +0100
From: Andrew Lunn <andrew@...n.ch>
To: Julien Panis <jpanis@...libre.com>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Russell King <linux@...linux.org.uk>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	Jesper Dangaard Brouer <hawk@...nel.org>,
	John Fastabend <john.fastabend@...il.com>,
	Sumit Semwal <sumit.semwal@...aro.org>,
	Christian König <christian.koenig@....com>,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	bpf@...r.kernel.org, linux-media@...r.kernel.org,
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH] net: ethernet: ti: am65-cpsw: Add minimal XDP support

> +static struct sk_buff *am65_cpsw_alloc_skb(struct net_device *ndev, unsigned int len)
> +{
> +	struct page *page;
> +	struct sk_buff *skb;
> +
> +	page = dev_alloc_pages(0);

You are likely to get better performance if you use the page_pool.

When FEC added XDP support, the first set of changes was to make use
of page_pool. That improved the drivers performance. Then XDP was
added on top. Maybe you can follow that pattern.

      Andrew