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

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Date:	Sat, 5 Dec 2015 11:34:29 -0800
From:	Alexander Duyck <alexander.duyck@...il.com>
To:	Tom Herbert <tom@...bertland.com>
Cc:	David Miller <davem@...emloft.net>,
	Hannes Frederic Sowa <hannes@...essinduktion.org>,
	John Linville <linville@...driver.com>,
	Jesse Gross <jesse@...nel.org>,
	Anjali Singhai Jain <anjali.singhai@...el.com>,
	Netdev <netdev@...r.kernel.org>,
	Kiran Patil <kiran.patil@...el.com>
Subject: Re: [PATCH v1 1/6] net: Generalize udp based tunnel offload

On Sat, Dec 5, 2015 at 9:53 AM, Tom Herbert <tom@...bertland.com> wrote:
>> Keep in mind I don't represent one of the hardware vendors here
>> anymore.  I am approaching this from the customer point of view.  I
>> would like to have the performance I can get out of the parts I have.
>
> Trying enabling UDP checksum, GRO/GSO, and Remote Checksum Offload in
> VXLAN. Assuming you have a NIC that at least provides UDP checksum
> offload and RSS for UDP (may need to be enabled) you can get good
> VXLAN performance across a varietyof legacy "dumb" NICs.

VXLAN offload support is already there so I can make use of that in
hardware.  I assume we aren't talking about introducing a performance
regression by removing the VXLAN Rx port notification code.

Setting up any given environment I have to work with the hand I am
dealt.  If I can make use of the work you did to do offloading with
standard NICs then I will, but more solutions for the performance with
tunnels is always better.

- Alex
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