From mboxrd@z Thu Jan  1 00:00:00 1970
From: Florian Westphal <fw@strlen.de>
Subject: Re: nf_nat_cleanup_conntrack performance with rhlist
Date: Wed, 6 Sep 2017 14:39:43 +0200
Message-ID: <20170906123943.GD11551@breakpoint.cc>
References: <CANWdNRCtJreq1xP2sgA=mgV8X15W1Ki-u=Ot3r1eANEVeHKRSA@mail.gmail.com>
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Cc: netfilter-devel@vger.kernel.org, fw@strlen.de, pablo@netfilter.org
To: Ivan Babrou <ibobrik@gmail.com>
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Ivan Babrou <ibobrik@gmail.com> wrote:
> Hello,
> 
> We hit a bug where nf_nat_cleanup_conntrack is taking exponential amount of time
> if you ping a lot of distinct IPs. It seems to be related to hlist ->
> rhlist migration.

Yes, and its best to revert, I sent patches to do just that.

Thanks for the heads-up.