netdev - Re: [patch v4, kernel version 3.2.1] net/ipv4/ip

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Message-Id: <20120125.203746.1977019610549185259.davem@davemloft.net>
Date:	Wed, 25 Jan 2012 20:37:46 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	steweg@...t.sk
Cc:	jesse@...ira.com, joseph.glanville@...onvm.com.au,
	eric.dumazet@...il.com, kuznet@....inr.ac.ru, jmorris@...ei.org,
	yoshfuji@...ux-ipv6.org, kaber@...sh.net, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch v4, kernel version 3.2.1] net/ipv4/ip_gre: Ethernet
 multipoint GRE over IP

From: Štefan Gula <steweg@...t.sk>
Date: Wed, 25 Jan 2012 23:57:18 +0100

> The performance is one of the most critical thing why I have chosen to
> build kernel patch in the first place instead of some user-space app.
> If I used this approach, I would probably end up with patch for
> OpenVPN project instead in that time. I am not telling that
> openvswitch is not a good place for prototyping, but I believe that
> this patch is beyond that border as it successfully run in environment
> with more 98 linux-based APs, used for 4K+ users, with no issue for
> more than 2 years. The performance results from Joseph Glanville even
> adds value to it. So I still don't get the point, why my patch and
> openvswitch cannot coexists in the kernel together and let user/admin
> to choose to correct solution for him/her.

You don't even know if openvswitch could provide acceptable levels
of performance, because you haven't even tried.

I'm not applying your patch.
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