linux-kernel - Re: [PATCH 00/19] printk cleanup

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Message-ID: <aWfGj1eQhj2fAWB-@aspen.lan>
Date: Wed, 14 Jan 2026 16:38:39 +0000
From: Daniel Thompson <danielt@...nel.org>
To: Marcos Paulo de Souza <mpdesouza@...e.com>
Cc: Daniel Thompson <daniel@...cstar.com>,
	Richard Weinberger <richard@....at>,
	Anton Ivanov <anton.ivanov@...bridgegreys.com>,
	Johannes Berg <johannes@...solutions.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jason Wessel <jason.wessel@...driver.com>,
	Douglas Anderson <dianders@...omium.org>,
	Petr Mladek <pmladek@...e.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	John Ogness <john.ogness@...utronix.de>,
	Sergey Senozhatsky <senozhatsky@...omium.org>,
	Jiri Slaby <jirislaby@...nel.org>, Breno Leitao <leitao@...ian.org>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Geert Uytterhoeven <geert@...ux-m68k.org>,
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	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jacky Huang <ychuang3@...oton.com>,
	Shan-Chun Hung <schung@...oton.com>,
	Laurentiu Tudor <laurentiu.tudor@....com>,
	linux-um@...ts.infradead.org, linux-kernel@...r.kernel.org,
	kgdb-bugreport@...ts.sourceforge.net, linux-serial@...r.kernel.org,
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Subject: Re: [PATCH 00/19] printk cleanup - part 3

On Tue, Jan 13, 2026 at 09:32:33PM -0300, Marcos Paulo de Souza wrote:
> I talked with Petr Mladek and it would need to rework the way that we
> register a console, and he's already working on it. For now I believe
> that we could take a look in all the patches besides the last one that
> currently breaks the earlycon with kgdb and maybe other usecases.
>
> Sorry for not catching this issue before. I'll use kgdb next time to
> make sure that it keeps working :)

As I understood things the bug was in earlycon rather then kgdb.

It was picked up by the kgdbtest suite since kgdb does some cool things
with earlycon (thanks to Doug Anderson) so I added a few earlycon tests
to the kgdbtest suite. However it wasn't kgdb itself that failed here.

So... if you want to run https://gitlab.com/daniel-thompson/kgdbtest
then certainly feel free but its probably less effort just to include
a couple of earlycon checks in your testing.


Daniel.