From mboxrd@z Thu Jan  1 00:00:00 1970
From: John Ogness <john.ogness@linutronix.de>
Subject: Re: Serial console is causing system lock-up
Date: Fri, 08 Mar 2019 03:36:27 +0100
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In-Reply-To: <20190308013952.GA9085@jagdpanzerIV> (Sergey Senozhatsky's
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To: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>, Nigel Croxon <ncroxon@redhat.com>, "Theodore Y. Ts'o" <tytso@mit.edu>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, John Stoffel <john@stoffel.org>, Steven Rostedt <rostedt@goodmis.org>, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, dm-devel@redhat.com, Mikulas Patocka <mpatocka@redhat.com>, linux-serial@vger.kernel.org
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On 2019-03-08, Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com> wrote:
>>> Perhaps a proper solution would be to drop excessive messages to
>>> serial console unless Oops or BUG has happened?
>> 
>> Technically, we can have a per-console loglevel configuration. We
>> have several use cases for this already.
>
> JFI,
>
> lore.kernel.org/r/cover.1551486732.git.calvinowens@fb.com

FWIW, I support the patch. It makes consoles into actual objects rather
than just a collection of callbacks. I feel like Calvin is pushing in a
similar direction to what I would like to see: decoupling of console
drivers to allow for individual behavior and performance tuning. As we
move into the highly SMP systems of the future, I am convinced this is
inevitable.

John Ogness