linux-kernel - Re: [RFC] arch/x86/Kconfig.cpu: Update with new gcc disponible 64bits CPU uarchs.

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Date:   Mon, 19 Dec 2016 18:31:23 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Gustavo da Silva <gustavodasilva@...il.com>
Cc:     linux-kernel@...r.kernel.org, x86@...r.kernel.org
Subject: Re: [RFC] arch/x86/Kconfig.cpu: Update with new gcc disponible
 64bits CPU uarchs.

On Mon, Dec 19, 2016 at 03:09:50PM -0200, Gustavo da Silva wrote:
> Good afternon!
> 
> Are there reasons to 'Kconfig.cpu' and 'Makefile' not contains the
> 'gcc -mtune=???'
> recent options?

This keeps popping up every couple of months. I was wondering when it is
going to appear again and there you are. :)

Here's a major reason: 99% of the kernels are built with
-m(arch|tune)=generic. Think distros.

Also, I am still waiting for a proof that CPU-optimized kernels have any
advantages compared to the =generic ones.

HTH.

-- 
Regards/Gruss,
    Boris.

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