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Date:   Tue, 18 Jul 2023 12:23:35 +0200
From:   Petr Mladek <pmladek@suse.com>
To:     John Ogness <john.ogness@linutronix.de>
Cc:     Sergey Senozhatsky <senozhatsky@chromium.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH printk v3 3/7] printk: Keep non-panic-CPUs out of console
 lock
Message-ID: <ZLZoJy8_meWUl9wv@alley>
References: <20230717194607.145135-1-john.ogness@linutronix.de>
 <20230717194607.145135-4-john.ogness@linutronix.de>
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On Mon 2023-07-17 21:52:03, John Ogness wrote:
> When in a panic situation, non-panic CPUs should avoid holding the
> console lock so as not to contend with the panic CPU. This is already
> implemented with abandon_console_lock_in_panic(), which is checked
> after each printed line. However, non-panic CPUs should also avoid
> trying to acquire the console lock during a panic.
> 
> Modify console_trylock() to fail and console_lock() to block() when
> called from a non-panic CPU during a panic.
> 
> Signed-off-by: John Ogness <john.ogness@linutronix.de>

Reviewed-by: Petr Mladek <pmladek@suse.com>

Best Regards,
Petr