From: John Ogness <john.ogness@linutronix.de>
To: Peter Geis <pgwipeout@gmail.com>
Cc: Petr Mladek <pmladek@suse.com>,
Sergey Senozhatsky <senozhatsky@chromium.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
"open list:ARM/Rockchip SoC..."
<linux-rockchip@lists.infradead.org>
Subject: Re: [BUG] Threaded printk breaks early debugging
Date: Mon, 13 Jun 2022 01:14:50 +0206 [thread overview]
Message-ID: <87zgihlbst.fsf@jogness.linutronix.de> (raw)
In-Reply-To: <CAMdYzYr-Wo713Y4qjboTpoK6GcrYfKCfRJAEizwXw6-=dymVzg@mail.gmail.com>
On 2022-06-10, Peter Geis <pgwipeout@gmail.com> wrote:
> This might be a side effect of the fact that this is on a low powered
> arm64 board. I noticed with threading enabled during large bursts the
> console drops an excessive amount of messages. It's especially
> apparent during the handover from earlycon to the normal console.
I guess you have a very small kernel buffer and are generating unusually
high amounts of messages? Is there a reason you cannot use a larger
buffer?
Or maybe you are generating a constant amount of messages that a serial
port could never keep up with unless it was interfering with the system
in such a way as to slow everything down? This is exactly what printk
should _not_ be used for.
John Ogness
next prev parent reply other threads:[~2022-06-12 23:09 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-10 12:48 [BUG] Threaded printk breaks early debugging Peter Geis
2022-06-10 15:05 ` John Ogness
2022-06-10 15:34 ` Peter Geis
2022-06-12 2:57 ` Sergey Senozhatsky
2022-06-12 13:30 ` Peter Geis
2022-06-12 23:08 ` John Ogness [this message]
2022-06-12 23:30 ` Peter Geis
2022-06-13 2:23 ` John Ogness
2022-06-13 15:11 ` Petr Mladek
2022-06-13 22:20 ` Peter Geis
2022-06-14 8:38 ` Petr Mladek
2022-06-13 11:24 ` Petr Mladek
2022-06-12 3:13 ` Sergey Senozhatsky
2022-06-12 23:02 ` John Ogness
2022-06-13 3:49 ` Sergey Senozhatsky
2022-06-13 8:30 ` John Ogness
2022-06-13 9:05 ` Sergey Senozhatsky
2022-06-13 10:14 ` Petr Mladek
2022-06-13 16:11 ` David Laight
2022-06-14 8:37 ` Petr Mladek
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