netdev - Re: [ovs-dev] OVS + BPF, make sense?

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Message-ID: <20141222095321.GA21348@pox.localdomain>
Date:	Mon, 22 Dec 2014 10:53:21 +0100
From:	Thomas Graf <tgraf@...ronetworks.com>
To:	Andy Zhou <azhou@...ira.com>
Cc:	"dev@...nvswitch.com" <dev@...nvswitch.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: [ovs-dev] OVS + BPF, make sense?

Thanks a lot for sharing these minutes.

On 12/19/14 at 06:49pm, Andy Zhou wrote:
> Possible use cases of BPF in OVS Linux kernel datapath
> ===========================================
>
> [...]
>
> 4. Using BPF to implement overall OVS kernel module functionality
> 
>    Alexei likes this approach the most. The potential benefits are:

This would be my favourite as well long term assuming that the
performance benefits we hope for can be proven. A logical evolutionary
process might be 2, 3 and then go for the full coverage.

A small but: We can't just remove the existing Netlink based action
data path as non-OVS users exist which rely on it. So this would need
to exist in parallel unless we can get all users on board to transition
over to this new architecture.
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