linux-kernel - Re: [PATCH printk-rework 11/14] printk: remove logbuf

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Message-ID: <YDTqqklNWi9K5oQv@alley>
Date:   Tue, 23 Feb 2021 12:44:42 +0100
From:   Petr Mladek <pmladek@...e.com>
To:     John Ogness <john.ogness@...utronix.de>
Cc:     Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        Steven Rostedt <rostedt@...dmis.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH printk-rework 11/14] printk: remove logbuf_lock

On Thu 2021-02-18 09:18:14, John Ogness wrote:
> Since the ringbuffer is lockless, there is no need for it to be
> protected by @logbuf_lock. Remove @logbuf_lock.
> 
> This means that printk_nmi_direct and printk_safe_flush_on_panic()
> no longer need to acquire any lock to run.
> 
> @console_seq, @exclusive_console_stop_seq, @console_dropped are
> protected by @console_lock.
> 
> Signed-off-by: John Ogness <john.ogness@...utronix.de>

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

Best Regards,
Petr