Why dmesg output displayed on /dev/tty1

This is still related to my [yesterday thread](https://unix.stackexchange.com/questions/703218/annoying-clocksource-alert-warning-in-bash-prompt-periodically) , so there's alert or maybe it's just log that displayed on my terminal on

/dev/tty1

. Ofcourse it's annoying because it's displayed in my bash prompt, so whenever I want input something, my input has been overwrite with that output. It came printed out periodically maybe about

second

. So you can see how it's annoying My terminal is moreless looks like this:

root@LFS:# echo "Hey get out of there"clocksource: timekeeping watchdog on CPU0: acpi_pm wd-wd readback delay of 643744ns
clocksource: wd-tsc-wd read-back delay of 182144ns, clock-skew test skipped!
clocksource: timekeeping watchdog on CPU0: acpi_pm wd-wd readback delay of 643744ns
clocksource: wd-tsc-wd read-back delay of 182144ns, clock-skew test skipped!
clocksource: timekeeping watchdog on CPU0: acpi_pm wd-wd readback delay of 643744ns
clocksource: wd-tsc-wd read-back delay of 182144ns, clock-skew test skipped!
...

I suspect this is not because of

, but

output. Because when I command

. It display same. But whenever I use

/dev/pts

There's no annoying output or alert that came periodically, I tested it when I login SSH in my LFS sistem. So how to prevent dmesg log displayed to

/dev/tty1

Update: Inside

/proc/cmdline

root@LFS:~# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.16.9-lfs-11.1 root=/dev/sda1 ro