netdev - Re: ipsec impact on performance

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Message-ID: <CALx6S36gcbJRJOTdUhgZGVbe4YzBeuBgv105kXLMyDSBBQ_56Q@mail.gmail.com>
Date:	Wed, 2 Dec 2015 13:44:20 -0800
From:	Tom Herbert <tom@...bertland.com>
To:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
Cc:	David Laight <David.Laight@...lab.com>,
	Linux Kernel Network Developers <netdev@...r.kernel.org>,
	"linux-crypto@...r.kernel.org" <linux-crypto@...r.kernel.org>,
	Rick Jones <rick.jones2@....com>
Subject: Re: ipsec impact on performance

On Wed, Dec 2, 2015 at 1:12 PM, Sowmini Varadhan
<sowmini.varadhan@...cle.com> wrote:
> On (12/02/15 13:07), Tom Herbert wrote:
>> That's easy enough to add to flow dissector, but is SPI really
>> intended to be used an L4 entropy value? We would need to consider the
>
> yes. To quote https://en.wikipedia.org/wiki/Security_Parameter_Index
> "This works like port numbers in TCP and UDP connections. What it means
>  is that there could be different SAs used to provide security to one
>  connection. An SA could therefore act as a set of rules."
>
>> effects of running multiple TCP connections over an IPsec. Also, you
>> might want to try IPv6, the flow label should provide a good L4 hash
>> for RPS/RFS, it would be interesting to see what the effects are with
>> IPsec processing. (ESP/UDP could also if RSS/ECMP is critical)
>
> IPv6 would be an interesting academic exercise, but it's going
> to be a while before we get RDS-TCP to go over IPv6.
>
Huh? Who said anything about RDS-TCP? I thought you were trying to
improve IPsec performance...
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