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From: John Ogness <john.ogness@linutronix.de>
To: Aruna Ramakrishna <aruna.ramakrishna@oracle.com>,
	linux-kernel@vger.kernel.org
Cc: pmladek@suse.com, rostedt@goodmis.org, senozhatsky@chromium.org
Subject: Re: [PATCH 0/1] printk: Yield console_sem to blocking waiters
Date: Fri, 11 Sep 2026 10:14:45 +0206	[thread overview]
Message-ID: <87zexocir6.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <20260910203331.4139656-1-aruna.ramakrishna@oracle.com>

On 2026-09-10, Aruna Ramakrishna <aruna.ramakrishna@oracle.com> wrote:
> Problem context:
>
> After a reboot, NetworkManager failed to bring up interfaces because
> systemd was stalled, due to a flood of printk warnings.

Note that kernel warnings are considered serious and will put the CPU
into emergency state.

> Systemd was
> blocked waiting on the console lock for over 122 seconds:

Also note that the console lock is related to legacy consoles. Rather
than trying to make the legacy console trainwreck more reliable and
non-interfering, efforts should be spent converting legacy consoles to
NBCON.

What console driver are you using?

For v7.3 the 8250 driver will be NBCON.

John

  parent reply	other threads:[~2026-09-11  8:08 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-10 20:33 Aruna Ramakrishna
2026-09-10 20:33 ` [PATCH 1/1] " Aruna Ramakrishna
2026-09-11  8:08 ` John Ogness [this message]
2026-09-11 18:25   ` [PATCH 0/1] " Aruna Ramakrishna

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