linux-kernel - Re: [PATCH] init/main.c: Wrap long kernel cmdline when printing to logs

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Message-ID: <CAMuHMdVT-_UVAO=1jvTPEjKO0zy7H1rUrQz1ubMfHivF4HWJNA@mail.gmail.com>
Date: Mon, 20 Oct 2025 17:40:30 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Doug Anderson <dianders@...omium.org>
Cc: Randy Dunlap <rdunlap@...radead.org>, linux-kernel@...r.kernel.org, 
	Andrew Chant <achant@...gle.com>, Alexander Shishkin <alexander.shishkin@...ux.intel.com>, 
	Andrew Morton <akpm@...ux-foundation.org>, Brian Gerst <brgerst@...il.com>, 
	Christian Brauner <brauner@...nel.org>, Francesco Valla <francesco@...la.it>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Guo Weikang <guoweikang.kernel@...il.com>, 
	Huacai Chen <chenhuacai@...nel.org>, Jan Hendrik Farr <kernel@...rr.cc>, Jeff Xu <jeffxu@...omium.org>, 
	Kees Cook <kees@...nel.org>, Masahiro Yamada <masahiroy@...nel.org>, 
	Michal Koutný <mkoutny@...e.com>, 
	Miguel Ojeda <ojeda@...nel.org>, "Mike Rapoport (Microsoft)" <rppt@...nel.org>, 
	Nathan Chancellor <nathan@...nel.org>, Peter Zijlstra <peterz@...radead.org>, 
	Shakeel Butt <shakeel.butt@...ux.dev>, Tejun Heo <tj@...nel.org>, 
	Thomas Gleixner <tglx@...utronix.de>, Thomas Weißschuh <thomas.weissschuh@...utronix.de>, 
	"Uladzislau Rezki (Sony)" <urezki@...il.com>
Subject: Re: [PATCH] init/main.c: Wrap long kernel cmdline when printing to logs

Hi Doug,

On Mon, 20 Oct 2025 at 17:33, Doug Anderson <dianders@...omium.org> wrote:
> Printing the command line to the kernel log buffer is one of the very
> rare cases where:
> * There's a legitimate reason to print a (potentially) very long
> string to the kernel buffer.

arch/s390/Kconfig:

    config COMMAND_LINE_SIZE
            int "Maximum size of kernel command line"
            default 4096
            range 896 1048576

Yummy...

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds