[systemd-devel] journald and kernel logging

Tomasz Sobczyk dottomi at gmail.com
Wed Jul 10 05:41:34 PDT 2013

Hmm, it might be my system configuration or a kernel bug, not systemd.
The thing is that kernel messages instead of being outputted to
/dev/console are outputted to the currently active VT.

I use metalog as the syslog and when it's run, these messages aren't
outputted to the VT. I saw that journald reads kernel messages and
stores them in its logs, so I was wondering whether it's supposed to
intercept/block that output like syslogs or not.

On 5 July 2013 22:23, Lennart Poettering <lennart at poettering.net> wrote:
> On Thu, 04.07.13 14:38, Tomasz Sobczyk (dottomi at gmail.com) wrote:
>> Hi,
>> Is the fact that journald reads the kernel log, but doesn't prevent
>> the messages from outputting to the active terminal a bug or desired
>> behaviour?
>> # echo "Test" > /dev/kmsg
>> Test
>> #
>> If I, let's say, connect a USB device then the active terminal is
>> spammed with the kernel log messages. I can prevent this by starting a
>> system logger, but with journald running I shouldn't need another one,
>> right?
> The log messages the kernel forwards to the console may be configured
> using /proc/sys/kernel/printk, and that's hardly something for journald
> to configure. See "man 5 proc" for details on tha file.
> Lennart
> --
> Lennart Poettering - Red Hat, Inc.

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