linux-kernel - Re: [PATCH v4 net-next 1/4] net: implement support for low latency socket polling

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Message-ID: <1369146938.3301.225.camel@edumazet-glaptop>
Date:	Tue, 21 May 2013 07:35:38 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Eliezer Tamir <eliezer.tamir@...ux.intel.com>
Cc:	Dave Miller <davem@...emloft.net>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	Jesse Brandeburg <jesse.brandeburg@...el.com>,
	Don Skidmore <donald.c.skidmore@...el.com>,
	e1000-devel@...ts.sourceforge.net,
	Willem de Bruijn <willemb@...gle.com>,
	Andi Kleen <andi@...stfloor.org>, HPA <hpa@...or.com>,
	Or Gerlitz <or.gerlitz@...il.com>,
	Eilon Greenstien <eilong@...adcom.com>,
	Eliezer Tamir <eliezer@...ir.org.il>
Subject: Re: [PATCH v4 net-next 1/4] net: implement support for low latency
 socket polling

On Tue, 2013-05-21 at 17:26 +0300, Eliezer Tamir wrote:

> +/* should be called when destroying a napi struct */
> +static inline void inc_ll_gen_id(void)
> +{
> +	ll_global_gen_id++;
> +}
> +
> +static inline void skb_mark_ll(struct sk_buff *skb, struct napi_struct *napi)
> +{
> +	skb->dev_ref = napi;
> +	skb->ll_gen_id = SKB_LL_GEN(ll_global_gen_id);
> +}
> +
> +static inline void sk_mark_ll(struct sock *sk, struct sk_buff *skb)
> +{
> +	if (skb->dev_ref && skb->ll_gen_id == SKB_LL_GEN(ll_global_gen_id)) {
> +		sk->dev_ref = skb->dev_ref;
> +		sk->ll_gen_id = ll_global_gen_id;
> +	} else
> +		sk->dev_ref = NULL; /* clear expired ref */
> +}
> +

Thats really hacky.

Please dont rush sending a new patch set every day.



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