From: John Ogness <john.ogness@linutronix.de>
To: Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <sergey.senozhatsky@gmail.com>,
Steven Rostedt <rostedt@goodmis.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Guenter Roeck <linux@roeck-us.net>,
Shreyas Joshi <shreyas.joshi@biamp.com>,
shreyasjoshi15@gmail.com,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
linux-kernel@vger.kernel.org, Petr Mladek <pmladek@suse.com>
Subject: Re: [RFC 1/2] printk: Add kernel parameter: mute_console
Date: Thu, 22 Oct 2020 15:16:19 +0206 [thread overview]
Message-ID: <87a6wez9s4.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <20201022114228.9098-2-pmladek@suse.com>
On 2020-10-22, Petr Mladek <pmladek@suse.com> wrote:
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index 02d4adbf98d2..52b9e7f5468d 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -2974,6 +2974,12 @@
> Used for mtrr cleanup. It is spare mtrr entries number.
> Set to 2 or more if your graphical card needs more.
>
> + mute_console [KNL]
> + Completely disable printing of kernel messages to
> + the console. It can still be used as stdin, stdout,
> + and stderr for the init process. Also it can be used
> + for login.
IMHO it would make more sense for this to be a console option:
console=ttyS0,115200,mute
Then other consoles could still exist that are not muted.
On a side note, I am considering proposing something similar for my
printk-rework efforts. Once console printers are moved to kthreads, some
users may not care about latencies and instead prefer synchronous
printing. My idea for this is to provide a "sync" option for the
console:
console=ttyS0,115200,sync
John Ogness
next prev parent reply other threads:[~2020-10-22 13:10 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-22 11:42 [RFC 0/2] printk: Official way to mute consoles Petr Mladek
2020-10-22 11:42 ` [RFC 1/2] printk: Add kernel parameter: mute_console Petr Mladek
2020-10-22 13:10 ` John Ogness [this message]
2020-10-22 14:15 ` Guenter Roeck
2020-10-22 14:53 ` John Ogness
2020-10-23 11:49 ` Petr Mladek
2020-10-23 14:52 ` Guenter Roeck
2020-10-22 13:45 ` Steven Rostedt
2020-10-22 14:22 ` Guenter Roeck
2020-10-23 9:46 ` Petr Mladek
2020-10-23 0:33 ` Sergey Senozhatsky
2020-10-23 12:11 ` Petr Mladek
2020-10-23 15:59 ` Linus Torvalds
2020-10-22 11:42 ` RFC 2/2] printk: Restore and document obsolete ways to disable console output Petr Mladek
2020-10-22 14:23 ` Guenter Roeck
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