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Date: Thu, 29 Sep 2022 03:33:54 +0200
From: Andrew Lunn <andrew@lunn.ch>
To: Shenwei Wang <shenwei.wang@nxp.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Jesper Dangaard Brouer <hawk@kernel.org>,
	John Fastabend <john.fastabend@gmail.com>, netdev@vger.kernel.org,
	linux-kernel@vger.kernel.org, imx@lists.linux.dev
Subject: Re: [PATCH 1/1] net: fec: add initial XDP support
Message-ID: <YzT2An2J5afN1w3L@lunn.ch>
References: <20220928152509.141490-1-shenwei.wang@nxp.com>
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In-Reply-To: <20220928152509.141490-1-shenwei.wang@nxp.com>

On Wed, Sep 28, 2022 at 10:25:09AM -0500, Shenwei Wang wrote:
> This patch adds the initial XDP support to Freescale driver. It supports
> XDP_PASS, XDP_DROP and XDP_REDIRECT actions. Upcoming patches will add
> support for XDP_TX and Zero Copy features.
> 
> This patch also optimizes the RX buffers by using the page pool, which
> uses one frame per page for easy management. In the future, it can be
> further improved to use two frames per page.

Please could you split this patch up. It is rather large and hard to
review. I think you can first add support for the page pool, and then
add XDP support, for example. 

I would be interesting to see how the page pool helps performance for
normal traffic, since that is what most people use it for. And for a
range of devices, since we need to make sure it does not cause any
regressions for older devices.

	    Andrew