netdev - Re: [PATCH RFC 1/3] xdp: Infrastructure to generalize XDP

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Message-ID: <20160920224416.GF3291@pox.localdomain>
Date:   Wed, 21 Sep 2016 00:44:16 +0200
From:   Thomas Graf <tgraf@...g.ch>
To:     Tom Herbert <tom@...bertland.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, kernel-team@...com,
        tariqt@...lanox.com, bblanco@...mgrid.com,
        alexei.starovoitov@...il.com, eric.dumazet@...il.com,
        brouer@...hat.com
Subject: Re: [PATCH RFC 1/3] xdp: Infrastructure to generalize XDP

On 09/20/16 at 03:00pm, Tom Herbert wrote:
> +static inline int __xdp_hook_run(struct list_head *list_head,
> +				 struct xdp_buff *xdp)
> +{
> +	struct xdp_hook_ops *elem;
> +	int ret = XDP_PASS;
> +
> +	list_for_each_entry(elem, list_head, list) {
> +		ret = elem->hook(elem->priv, xdp);
> +		if (ret != XDP_PASS)
> +			break;
> +	}

Walking over a linear list? Really? :-) I thought this was supposed
to be fast, no compromises made.