netdev - Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

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Message-Id: <1448387015.235472.448970977.10694A74@webmail.messagingengine.com>
Date:	Tue, 24 Nov 2015 18:43:35 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Tom Herbert <tom@...bertland.com>,
	Jesse Brandeburg <jesse.brandeburg@...el.com>
Cc:	"Singhai, Anjali" <anjali.singhai@...el.com>,
	Jesse Gross <jesse@...nel.org>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	"Patil, Kiran" <kiran.patil@...el.com>
Subject: Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

On Tue, Nov 24, 2015, at 18:32, Tom Herbert wrote:
> As you said this in only feedback and nobody is forcing anyone to do
> anything. But encouraging HW vendors to provide generic mechanisms so
> that your users can use whatever protocol they want is the exact
> _opposite_ of punishing users, this is very much a pro-user direction.

Some users will suffer worse performance in case we don't correctly set
ip_summed for a specific protocol before we do the copy operations from
user space into skbs but if they are always done in the driver.

Bye,
Hannes
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