From: Jarek Poplawski <jarkao2@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: David Miller <davem@davemloft.net>,
shemminger@vyatta.com, herbert@gondor.apana.org.au,
netdev@vger.kernel.org
Subject: Re: [PATCH] sky2: don't do GRO on second port
Date: Thu, 2 Sep 2010 12:28:58 +0000 [thread overview]
Message-ID: <20100902122858.GC8775@ff.dom.local> (raw)
In-Reply-To: <1283429349.2454.496.camel@edumazet-laptop>
On Thu, Sep 02, 2010 at 02:09:09PM +0200, Eric Dumazet wrote:
> Le jeudi 02 septembre 2010 ?? 11:02 +0000, Jarek Poplawski a écrit :
> > On Thu, Sep 02, 2010 at 12:41:45PM +0200, Eric Dumazet wrote:
>
> > > Two vlans might carry packets in different domains, with a clash of IP
> > > space and TCP flows. Even with a probability of 0.000000001%, we cannot
> > > ever merge two packets of different domains. Really !
> >
> > Hmm... But there is only a question of sky2 and this test in
> > __napi_gro_receive().
> >
>
> Any driver can receive in one napi run :
>
> 1) A TCP tagged frame for vlan 345, delivered to vlan_gro_receive(),
> queued in napi->gro_list.
>
> 2) An untagged frame, delived via napi_gro_receive()
> Can meet previous frame in napi->gro_list. Should not merge.
>
> So napi_gro_receive() must perform the same skb->dev check, sky2 or not.
But of course!!! I was mislead by Stephen's changelog so much. So now
I really can't understand this current: "sky2: don't do GRO on second
port"...
Thanks,
Jarek P.
next prev parent reply other threads:[~2010-09-02 12:29 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-27 20:50 [PATCH] net: Fix vlan_gro_frags vs netpoll and bonding paths Jarek Poplawski
2010-08-28 0:13 ` Herbert Xu
2010-08-28 9:44 ` Jarek Poplawski
2010-08-28 10:54 ` [RFC] gro: Is it ok to share a single napi from several devs ? Eric Dumazet
2010-08-28 14:31 ` Jarek Poplawski
2010-08-28 14:48 ` Eric Dumazet
2010-08-28 15:16 ` Jarek Poplawski
2010-08-28 17:14 ` Stephen Hemminger
2010-08-28 21:41 ` David Miller
2010-08-28 22:31 ` Stephen Hemminger
2010-08-28 22:33 ` David Miller
2010-08-29 9:59 ` Jarek Poplawski
2010-08-29 17:06 ` David Miller
2010-08-29 18:39 ` Eric Dumazet
2010-08-30 6:42 ` Jarek Poplawski
2010-08-30 15:57 ` Stephen Hemminger
2010-08-30 16:50 ` David Miller
2010-08-30 17:51 ` [PATCH] sky2: don't do GRO on second port Stephen Hemminger
2010-08-30 19:09 ` Jarek Poplawski
2010-09-01 21:51 ` David Miller
2010-09-01 21:55 ` Stephen Hemminger
2010-09-02 9:18 ` Jarek Poplawski
2010-09-02 12:53 ` Jarek Poplawski
2010-09-02 16:30 ` David Miller
2010-09-02 16:48 ` Jarek Poplawski
2010-09-02 8:33 ` Jarek Poplawski
2010-09-02 9:31 ` Eric Dumazet
2010-09-02 9:55 ` Jarek Poplawski
2010-09-02 10:41 ` Eric Dumazet
2010-09-02 11:02 ` Jarek Poplawski
2010-09-02 12:09 ` Eric Dumazet
2010-09-02 12:28 ` Jarek Poplawski [this message]
2010-09-02 17:08 ` David Miller
2010-09-02 21:26 ` Herbert Xu
2010-09-03 5:23 ` Eric Dumazet
2010-09-02 9:32 ` Jarek Poplawski
2010-08-30 18:36 ` [RFC] gro: Is it ok to share a single napi from several devs ? Jarek Poplawski
2010-08-30 19:59 ` [RFC] netpoll: " Eric Dumazet
2010-08-30 20:12 ` Stephen Hemminger
2010-08-30 20:19 ` Eric Dumazet
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