From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Subject: Re: [RFC PATCH v1 08/25] printk: add ring buffer and kthread
Date: Mon, 4 Mar 2019 20:07:03 +0900
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To: John Ogness <john.ogness@linutronix.de>
Cc: linux-kernel@vger.kernel.org, Peter Zijlstra <peterz@infradead.org>, Petr Mladek <pmladek@suse.com>, Steven Rostedt <rostedt@goodmis.org>, Daniel Wang <wonderfly@google.com>, Andrew Morton <akpm@linux-foundation.org>, Linus Torvalds <torvalds@linux-foundation.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, Alan Cox <gnomes@lxorguk.ukuu.org.uk>, Jiri Slaby <jslaby@suse.com>, Peter Feiner <pfeiner@google.com>, linux-serial@vger.kernel.org, Sergey Senozhatsky <sergey.senozhatsky@gmail.com>, Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
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On (03/04/19 19:00), Sergey Senozhatsky wrote:
> 
> But in general, channels which depend on preemptible printk will become
> totally useless in some cases.
> 

Which brings me to a question - what are those messages/channels?
Not important enough to be printed on consoles immediately, yet important
enough to pass the suppress_message_printing() check. We may wave those
semi-important messages good bye, I'm afraid, preemptible printk will
take care of it.

So... do we have a case here? Do we really need printk-kthread?

	-ss