From: Petr Mladek <pmladek@suse.com>
To: Sreenath Vijayan <sreenath.vijayan@sony.com>
Cc: john.ogness@linutronix.de, corbet@lwn.net,
gregkh@linuxfoundation.org, jirislaby@kernel.org,
rdunlap@infradead.org, rostedt@goodmis.org,
senozhatsky@chromium.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
taichi.shimoyashiki@sony.com, daniel.palmer@sony.com,
anandakumar.balasubramaniam@sony.com
Subject: Re: [PATCH v6 2/2] tty/sysrq: Replay kernel log messages on consoles via sysrq
Date: Wed, 22 May 2024 17:31:12 +0200 [thread overview]
Message-ID: <Zk4PwD2ZLldFAqEE@pathway.suse.cz> (raw)
In-Reply-To: <cc3b9b1aae60a236c6aed1dc7b0ffa2c7cd1f183.1710220326.git.sreenath.vijayan@sony.com>
On Wed 2024-03-13 15:52:52, Sreenath Vijayan wrote:
> When terminal is unresponsive, one cannot use dmesg to view
> the printk ring buffer messages. Also, syslog services may be
> disabled, especially on embedded systems, to check the messages
> after a reboot. In this scenario, replay the messages in printk
> ring buffer on consoles via sysrq by pressing sysrq+R.
>
> The console loglevel will determine which all kernel log messages
> are displayed. The messages will be displayed only when
> console_trylock() succeeds. Users could repeat the sysrq key when
> it fails. If the owner of console subsystem lock is stuck,
> repeating the key won't work.
>
> Suggested-by: Petr Mladek <pmladek@suse.com>
> Signed-off-by: Shimoyashiki Taichi <taichi.shimoyashiki@sony.com>
> Reviewed-by: John Ogness <john.ogness@linutronix.de>
> Signed-off-by: Sreenath Vijayan <sreenath.vijayan@sony.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Best Regards,
Petr
prev parent reply other threads:[~2024-05-22 15:31 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-13 10:17 [PATCH v6 0/2] Add support to replay kernel log on consoles via sysrq Sreenath Vijayan
2024-03-13 10:20 ` [PATCH v6 1/2] printk: Add function to replay kernel log on consoles Sreenath Vijayan
2024-05-22 15:18 ` Petr Mladek
2024-05-23 5:52 ` Sreenath Vijayan
2024-03-13 10:22 ` [PATCH v6 2/2] tty/sysrq: Replay kernel log messages on consoles via sysrq Sreenath Vijayan
2024-04-08 5:53 ` Sreenath Vijayan
2024-05-22 15:31 ` Petr Mladek [this message]
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