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Message-ID: <9055.1702242372@localhost>
Date: Sun, 10 Dec 2023 16:06:12 -0500
From: Michael Richardson <mcr@...delman.ca>
To: Eyal Birger <eyal.birger@...il.com>
cc: davem@...emloft.net, dsahern@...nel.org, edumazet@...gle.com,
kuba@...nel.org, pabeni@...hat.com, steffen.klassert@...unet.com,
herbert@...dor.apana.org.au, pablo@...filter.org, paul@...ats.ca,
nharold@...gle.com, devel@...ux-ipsec.org, netdev@...r.kernel.org
Subject: Re: [devel-ipsec] [PATCH ipsec-next, v2] xfrm: support sending NAT keepalives in ESP in UDP states
Eyal Birger <eyal.birger@...il.com> wrote:
>> As a general comment, until this work is RCU'ed I'm wondering how it
>> will perform on systems with thousands of SAs. As you say: this is a
>> place for improvement. If no keepalives are set, does the code need
>> to walk the xfrm states at all. I wonder if that might mitigate the
>> situation for bigger systems that have not yet adapted. I don't see a
>> way to not include this code.
> The work isn't scheduled unless there are states with a defined
> interval, so afaict this shouldn't affect systems not using this
> feature. Or maybe I didn't understand your point?
That wasn't obvious to me from my review, but that certainly sounds ideal.
Thank you.
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