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

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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.

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