linux-kernel - Re: [x86/mce] 1de08dccd3: will-it-scale.per_process

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: <20200425130136.GA28245@zn.tnic>
Date:   Sat, 25 Apr 2020 15:01:36 +0200
From:   Borislav Petkov <bp@...e.de>
To:     kernel test robot <rong.a.chen@...el.com>
Cc:     Tony Luck <tony.luck@...el.com>,
        LKML <linux-kernel@...r.kernel.org>, lkp@...ts.01.org
Subject: Re: [x86/mce] 1de08dccd3: will-it-scale.per_process_ops -14.1%
 regression

On Sat, Apr 25, 2020 at 07:44:14PM +0800, kernel test robot wrote:
> Greeting,
> 
> FYI, we noticed a -14.1% regression of will-it-scale.per_process_ops due to commit:
> 
> 
> commit: 1de08dccd383482a3e88845d3554094d338f5ff9 ("x86/mce: Add a struct mce.kflags field")

I don't see how a struct mce member addition will cause any performance
regression. Please check your test case.

Thx.

-- 
Regards/Gruss,
    Boris.

SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg