linux-kernel - Re: [PATCH printk v2 4/5] printk: Add per-console suspended state

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Date:   Wed, 12 Jul 2023 00:30:52 +0900
From:   Sergey Senozhatsky <senozhatsky@...omium.org>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Petr Mladek <pmladek@...e.com>,
        Sergey Senozhatsky <senozhatsky@...omium.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH printk v2 4/5] printk: Add per-console suspended state

On (23/07/10 15:51), John Ogness wrote:
> Currently the global @console_suspended is used to determine if
> consoles are in a suspended state. Its primary purpose is to allow
> usage of the console_lock when suspended without causing console
> printing. It is synchronized by the console_lock.
> 
> Rather than relying on the console_lock to determine suspended
> state, make it an official per-console state that is set within
> console->flags. This allows the state to be queried via SRCU.
> 
> Remove @console_suspended. Console printing will still be avoided
> when suspended because console_is_usable() returns false when
> the new suspended flag is set for that console.
> 
> Signed-off-by: John Ogness <john.ogness@...utronix.de>

Reviewed-by: Sergey Senozhatsky <senozhatsky@...omium.org>