Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Thu, 13 Jul 2023 16:51:33 +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 v2 3/5] printk: Consolidate console deferred
 printing
Message-ID: <ZLAPdSFhvTRkeBPz@alley>
References: <20230710134524.25232-1-john.ogness@linutronix.de>
 <20230710134524.25232-4-john.ogness@linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230710134524.25232-4-john.ogness@linutronix.de>
Precedence: bulk

On Mon 2023-07-10 15:51:22, John Ogness wrote:
> Printing to consoles can be deferred for several reasons:
> 
> - explicitly with printk_deferred()
> - printk() in NMI context
> - recursive printk() calls
> 
> The current implementation is not consistent. For printk_deferred(),
> irq work is scheduled twice. For NMI und recursive, panic CPU
> suppression and caller delays are not properly enforced.
> 
> Correct these inconsistencies by consolidating the deferred printing
> code so that vprintk_deferred() is the top-level function for
> deferred printing and vprintk_emit() will perform whichever irq_work
> queueing is appropriate.
> 
> Also add kerneldoc for wake_up_klogd() and defer_console_output() to
> clarify their differences and appropriate usage.
> 
> Signed-off-by: John Ogness <john.ogness@linutronix.de>

Looks good to me:

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

Best Regards,
Petr