netdev - Re: Serious performance degradation in Linux 4.15

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <20180215083850.GU25201@hirez.programming.kicks-ass.net>
Date:   Thu, 15 Feb 2018 09:38:50 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Matt Fleming <matt@...eblueprint.co.uk>
Cc:     Jon Maloy <jon.maloy@...csson.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "mingo@...nel.org" <mingo@...nel.org>,
        "David Miller (davem@...emloft.net)" <davem@...emloft.net>,
        Mike Galbraith <umgwanakikbuti@...il.com>
Subject: Re: Serious performance degradation in Linux 4.15

On Wed, Feb 14, 2018 at 10:46:20PM +0000, Matt Fleming wrote:
> Here's some more numbers. This is with RETPOLINE=y but you'll see it
> doesn't make much of a difference. Oh, this is also with powersave
> cpufreq governor.

Hurmph, I'll go have a look when I can boot tip/master again :/

But didn't you bench those patches before we merged them? I can't
remember you reporting this..