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

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Date:	Fri, 04 Dec 2015 16:37:01 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	tom@...bertland.com
Cc:	hannes@...essinduktion.org, linville@...driver.com,
	jesse@...nel.org, anjali.singhai@...el.com, netdev@...r.kernel.org,
	kiran.patil@...el.com
Subject: Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

From: Tom Herbert <tom@...bertland.com>
Date: Fri, 4 Dec 2015 12:13:53 -0800

> On Fri, Dec 4, 2015 at 12:06 PM, David Miller <davem@...emloft.net> wrote:
>> From: Hannes Frederic Sowa <hannes@...essinduktion.org>
>> Date: Fri, 04 Dec 2015 20:59:05 +0100
>>
>>> Yes, I agree, I am totally with you here. If generic offloading can be
>>> realized by NICs I am totally with you that this should be the way to
>>> go. I don't see that coming in the next (small number of) years, so I
>>> don't see a reason to stop this patchset.
>>
>> If I just apply this and say "yeah ok", the message is completely lost
>> and your prediction about "small number of years" indeed will occur.
>>
>> However if I push back hard on this, as I will, then the message has
>> some chance of seeping back to the people designing these chips.
>>
>> So that's what I'm going to do, like it or not.
>>
>> Or can someone convince me that someone who understand this stuff
>> is telling the hardware guys to universally put 2's complement
>> checksums into the descriptors?
>>
> We're talking about 1's complement checksum (RFC1701). Just to be clear :-)

Right :)
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