Message-ID: <1369158686.3301.237.camel@edumazet-glaptop>
Subject: Re: [PATCH v3 net-next 1/4] net: implement support for low latency
 socket polling
From: Eric Dumazet <eric.dumazet@gmail.com>
To: Pekka Riikonen <priikone@iki.fi>
Cc: Eliezer Tamir <eliezer.tamir@linux.intel.com>,
        Dave Miller <davem@davemloft.net>, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org, Jesse Brandeburg <jesse.brandeburg@intel.com>,
        Don Skidmore <donald.c.skidmore@intel.com>,
        e1000-devel@lists.sourceforge.net,
        Willem de Bruijn <willemb@google.com>,
        Andi Kleen <andi@firstfloor.org>, HPA <hpa@zytor.com>,
        Eliezer Tamir <eliezer@tamir.org.il>
Date: Tue, 21 May 2013 10:51:26 -0700
In-Reply-To: <1369158499.3301.236.camel@edumazet-glaptop>
References: <20130520101552.14133.45953.stgit@ladj378.jer.intel.com>
	 <20130520101601.14133.874.stgit@ladj378.jer.intel.com>
	 <1369063764.3301.182.camel@edumazet-glaptop>
	 <519B2237.20204@linux.intel.com>
	 <1369142926.3301.213.camel@edumazet-glaptop>
	 <alpine.GSO.2.00.1305211855120.9230@git.silcnet.org>
	 <1369158499.3301.236.camel@edumazet-glaptop>
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On Tue, 2013-05-21 at 10:48 -0700, Eric Dumazet wrote:

> We do not keep skb->dev information once a packet leaves the rcu
> protected region.
> 
> Once packet is queued to tcp input queues, skb->dev is NULL.

This is done in tcp_v4_rcv() & tcp_v6_rcv()


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