netdev - Re: ipsec impact on performance

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Message-ID: <20151202220803.GG15262@oracle.com>
Date:	Wed, 2 Dec 2015 17:08:03 -0500
From:	Sowmini Varadhan <sowmini.varadhan@...cle.com>
To:	Tom Herbert <tom@...bertland.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 (12/02/15 14:01), Tom Herbert wrote:
> No, please don't persist is this myopic "we'll get to IPv6 later"
> model! IPv6 is a real protocol, it has significant deployment of the
> Internet, and there are now whole data centers that are IPv6 only
> (e.g. FB), and there are plenty of use cases of IPSEC/IPv6 that could
> benefit for performance improvements just as much IPv4. This vendor
> mentality that IPv6 is still not important simply doesn't help
> matters. :-(

Ok, I'll get you the numbers for this later, and sure, if we do
this, we should solve the ipv6 problem too.

BTW, the ipv6 nov3 paths have severe alignment issues. I flagged
this a long time ago http://www.spinics.net/lists/netdev/msg336257.html

I think all of it is triggered by mld. Someone needs to do
something about that too. I dont think those paths are using 
NET_ALIGN very well, and I dont think this is the most wholesome
thing for perf.

--Sowmini
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