netdev - Re: [PATCH net-next-2.6] net: harmonize the call to ptype_all and ptype

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Message-ID: <20110307100318.GD2832@psychotron.brq.redhat.com>
Date:	Mon, 7 Mar 2011 11:03:19 +0100
From:	Jiri Pirko <jpirko@...hat.com>
To:	Nicolas de Pesloüan <nicolas.2p.debian@...e.fr>
Cc:	netdev@...r.kernel.org, davem@...emloft.net, shemminger@...tta.com,
	eric.dumazet@...il.com, kaber@...sh.net, fubar@...ibm.com,
	andy@...yhouse.net
Subject: Re: [PATCH net-next-2.6] net: harmonize the call to ptype_all and
 ptype_base handlers.

Sun, Mar 06, 2011 at 02:25:16PM CET, nicolas.2p.debian@...e.fr wrote:
>Until now, ptype_all and ptype_base delivery in __netif_receive_skb() is
>inconsistent.
>
>- For ptype_all, we deliver to every device crossed while walking the
>rx_handler path (inside the another_round loop), and there is no way to stop
>wildcard delivery (no exact match logic).
>- For ptype_base, we deliver to the lowest device (orig_dev) and to the highest
>(skb->dev) and we can ask for exact match delivery.
>
>This patch try and fix this, by:
>
>1/ Doing exact match delivery for both ptype_all and ptype_base, while walking
>   the rx_handler path.
>2/ Doing wildcard match delivery at the end of __netif_receive_skb(), if not
>   asked to do exact match delivery only.
>
>Signed-off-by: Nicolas de Pesloüan <nicolas.2p.debian@...e.fr>
>---
>
>This apply on top of the last batch of patch from Jiri Pirko.
>---
> net/core/dev.c |   32 ++++++++++++++++++++++++--------
> 1 files changed, 24 insertions(+), 8 deletions(-)
>

I tend to like this patch. However I'm not sure if extra 2 loops don't
introduce noticable overhead :/
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