linux-kernel - Re: [for-next][PATCH 04/26] bootconfig: Add Extra Boot Config support

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Message-Id: <20200207114617.3bda49673175d3fa33cbe85e@kernel.org>
Date:   Fri, 7 Feb 2020 11:46:17 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Borislav Petkov <bp@...en8.de>
Cc:     Steven Rostedt <rostedt@...dmis.org>, linux-kernel@...r.kernel.org,
        Ingo Molnar <mingo@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [for-next][PATCH 04/26] bootconfig: Add Extra Boot Config
 support

Hi,

On Thu, 6 Feb 2020 18:58:58 +0100
Borislav Petkov <bp@...en8.de> wrote:

> On Thu, Feb 06, 2020 at 11:41:00PM +0900, Masami Hiramatsu wrote:
> > Oh, you are not the first person asked that :)
> > 
> > https://lkml.org/lkml/2019/12/9/563
> > 
> > And yes, I think this is important that will useful for most developers
> > and admins. Since the bootconfig already covers kernel and init options,
> > this can be a new standard way to pass args to kernel boot.
> 
> Aha, so Steve and you believe this will become the next great thing
> after sliced bread. Sorry but I remain sceptical. :)

It could change some other things. I recommend developers to use this
feature to configure their subsystem easier and admins to configure
kernel boot options more readable way.

> I would've done it differently: have it default 'n' and once it turns
> out that the major distros have enabled it and *actually* use it, *then*
> simply remove the config option. Like we usually do with functionality.
> Not the other way around.

Many distros may not use it unless it is default y. I couldn't find any
good example that the feature "default n" turns into "default y".
Would you have any example?

> In any case, I've disabled it on my machines and will wait for it
> missing to come back and bite me. :-P

Hmm, what would you afraid of? It is just a small footprint additional
feature which never be enabled without "bootconfig" on the kernel cmdline...

Thank you,

> 
> -- 
> Regards/Gruss,
>     Boris.
> 
> https://people.kernel.org/tglx/notes-about-netiquette


-- 
Masami Hiramatsu <mhiramat@...nel.org>