linux-kernel - Re: [PATCH v3 1/3] printk: Introduce console_flush_one

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Message-ID: <875xc5dag5.fsf@jogness.linutronix.de>
Date: Thu, 23 Oct 2025 15:23:14 +0206
From: John Ogness <john.ogness@...utronix.de>
To: Andrew Murray <amurray@...goodpenguin.co.uk>, Petr Mladek
 <pmladek@...e.com>, Steven Rostedt <rostedt@...dmis.org>, Sergey
 Senozhatsky <senozhatsky@...omium.org>
Cc: linux-kernel@...r.kernel.org, Andrew Murray <amurray@...goodpenguin.co.uk>
Subject: Re: [PATCH v3 1/3] printk: Introduce console_flush_one_record

On 2025-10-20, Andrew Murray <amurray@...goodpenguin.co.uk> wrote:
> console_flush_all prints all remaining records to all usable consoles
> whilst its caller holds console_lock. This can result in large waiting
> times for those waiting for console_lock especially where there is a
> large volume of records or where the console is slow (e.g. serial).
>
> Let's extract the parts of this function which print a single record
> into a new function named console_flush_one_record. This can later
> be used for functions that will release and reacquire console_lock
> between records.
>
> This commit should not change existing functionality.
>
> Reviewed-by: Petr Mladek <pmladek@...e.com>
> Signed-off-by: Andrew Murray <amurray@...goodpenguin.co.uk>

Reviewed-by: John Ogness <john.ogness@...utronix.de>