From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: Regression: kernel 4.14 an later very slow with many ipsec
 tunnels
Date: Thu, 13 Sep 2018 10:23:05 -0700 (PDT)
Message-ID: <20180913.102305.939671149040995911.davem@davemloft.net>
References: <20180913135844.3ut6fxgx67t6ndtu@breakpoint.cc>
        <3448099.9yk84El3Sa@stwm.de>
        <20180913163848.ni5xc4gc4d6uusdn@breakpoint.cc>
Mime-Version: 1.0
Content-Type: Text/Plain; charset=us-ascii
Content-Transfer-Encoding: 7bit
Cc: linux@stwm.de, netdev@vger.kernel.org,
        steffen.klassert@secunet.com, linux-kernel@vger.kernel.org,
        torvalds@linux-foundation.org
To: fw@strlen.de
Return-path: <linux-kernel-owner@vger.kernel.org>
In-Reply-To: <20180913163848.ni5xc4gc4d6uusdn@breakpoint.cc>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: netdev.vger.kernel.org

From: Florian Westphal <fw@strlen.de>
Date: Thu, 13 Sep 2018 18:38:48 +0200

> Wolfgang Walter <linux@stwm.de> wrote:
>> What I can say is that it depends mainly on number of policy rules and SA.
> 
> Thats already a good hint, I guess we're hitting long hash chains in
> xfrm_policy_lookup_bytype().

I don't really see how recent changes can influence that.

And the bydst hashes have been dynamically sized for a very long time.

I might have missed something...