linux-kernel - Re: [PATCH tty-next v1 0/2] convert 8250 to nbcon

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Message-ID: <87cyli2nqo.fsf@jogness.linutronix.de>
Date: Thu, 05 Sep 2024 16:18:31 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Jiri Slaby <jirislaby@...nel.org>, Petr Mladek <pmladek@...e.com>,
 Sergey Senozhatsky <senozhatsky@...omium.org>, Steven Rostedt
 <rostedt@...dmis.org>, Thomas Gleixner <tglx@...utronix.de>,
 linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org, Andy
 Shevchenko <andriy.shevchenko@...ux.intel.com>, Tony Lindgren
 <tony@...mide.com>, "Paul E. McKenney" <paulmck@...nel.org>, Uwe
 Kleine-König <u.kleine-koenig@...gutronix.de>, Ilpo
 Järvinen
 <ilpo.jarvinen@...ux.intel.com>, Serge Semin <fancer.lancer@...il.com>,
 Rengarajan S <rengarajan.s@...rochip.com>, Wolfram Sang
 <wsa+renesas@...g-engineering.com>, Florian Fainelli
 <f.fainelli@...il.com>, Jeff Johnson <quic_jjohnson@...cinc.com>, Lino
 Sanfilippo <l.sanfilippo@...bus.com>, Derek Barbosa <debarbos@...hat.com>
Subject: Re: [PATCH tty-next v1 0/2] convert 8250 to nbcon

On 2024-09-05, Greg Kroah-Hartman <gregkh@...uxfoundation.org> wrote:
> On Thu, Sep 05, 2024 at 03:53:17PM +0206, John Ogness wrote:
>> The recent printk rework introduced a new type of console NBCON
>> that will perform printing via a dedicated kthread during
>> normal operation. For times when the kthread is not available
>> (early boot, panic, reboot/shutdown) the NBCON console will
>> print directly from the printk() calling context (even if from
>> NMI).
>> 
>> Futher details about NBCON consoles are available here [0].
>
> Really?  That link calls them "NOBKL", is that the same thing?

Sorry. Yes, they are the same thing. It was renamed because NOBKL did
not look nice.

NBCON stands for "No BKL Console".

John