linux-kernel - Re: [RFC] CONFIG_FORCE_MINIMALLY_SANE

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Message-ID: <569E089B.2000808@suse.cz>
Date:	Tue, 19 Jan 2016 10:57:47 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Borislav Petkov <bp@...e.de>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Måns Rullgård <mans@...sr.com>,
	Markus Trippelsdorf <markus@...ppelsdorf.de>,
	Thomas Voegtle <tv@...96.de>, linux-kernel@...r.kernel.org,
	x86-ml <x86@...nel.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Thomas Gleixner <tglx@...utronix.de>,
	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Frédéric Weisbecker <fweisbec@...il.com>
Subject: Re: [RFC] CONFIG_FORCE_MINIMALLY_SANE_CONFIG=y

On 2016-01-19 09:20, Ingo Molnar wrote:
> In fact on x86 I'd suggest we go farther than that and add a core set of selects 
> that can be disabled only through a sufficiently scary "I really know I'm doing 
> something utmost weird" (and default disabled) config option.

Agreed.


> From my own randconfig testing I can give a core list of must-have kernel options, 
> without which most distros (Fedora, RHEL, Ubuntu, SuSE) won't boot properly:
> 
> +config FORCE_MINIMALLY_SANE_CONFIG
> +	bool
> +	default y

You should add a prompt so that the option can be disabled. Or make it
default !EXPERT, to have a single "I know what I'm doing"-type of option.

Michal