netdev - Re: Regression: kernel 4.14 an later very slow with many ipsec tunnels

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 13 Sep 2018 15:58:44 +0200
From:   Florian Westphal <fw@...len.de>
To:     Wolfgang Walter <linux@...m.de>
Cc:     netdev@...r.kernel.org, Florian Westphal <fw@...len.de>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        David Miller <davem@...hat.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: Regression: kernel 4.14 an later very slow with many ipsec
 tunnels

Wolfgang Walter <linux@...m.de> wrote:
> thanks to the fix from Steffen Klassert I could now run 4.14.69 + his patch 
> and 4.18.7 + his patch without oopsing immediately.
> 
> But I found that those kernels perform very bad. They perform so bad that they 
> are unusable for our router with about 3000 ipsec tunnels (tunnel mode network 
> <-> network).

Can you do a 'perf record -a -g sleep 5' with 4.18 and provide 'perf
report' result?

It would be good to see where those cycles are spent.