netdev - Re: [evb] RE: [PATCH][RFC] net/bridge: add basic VEPA support

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Message-ID: <4A967DAB.2010209@voltaire.com>
Date:	Thu, 27 Aug 2009 15:35:55 +0300
From:	Or Gerlitz <ogerlitz@...taire.com>
To:	Stephen Hemminger <shemminger@...ux-foundation.org>
CC:	"Paul Congdon (UC Davis)" <ptcongdon@...avis.edu>, arnd@...db.de,
	anna.fischer@...com, netdev@...r.kernel.org,
	bridge@...ts.linux-foundation.org, davem@...emloft.net,
	adobriyan@...il.com, virtualization@...ts.linux-foundation.org,
	"evb@...oogroups.com" <evb@...oogroups.com>
Subject: Re: [evb] RE: [PATCH][RFC] net/bridge: add basic VEPA support

Stephen Hemminger wrote:
> Or Gerlitz <ogerlitz@...taire.com> wrote:
>> Looking in macvlan_set_multicast_list() it acts in a similar manner to macvlan_set_mac_address() in the sense that it calls dev_mc_sync(). I assume what's left is to add macvlan_hash_xxx multicast logic to map/unmap multicast groups to what macvlan devices want to receive them and this way the flooding can be removed, correct?
> The device can just flood all multicast packets, since the filtering is done on the receive path anyway.
for each multicast packet, macvlan_broadcast is invoked and calls 
skb_clone/ netif_rx for each device, now a smart scheme that takes into 
account (hash) the multicast list of the different macvlan  devices 
would save the skb_clone call, isn't it?

Or.

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