runtime control of printk times

source URL: http://elinux.org/Printk_Times

You can enable and disable printk timestamps at runtime, by writing to /sys/module/printk/parameters/time.

# cat /sys/module/printk/parameters/time

N

# echo 1 >/sys/module/printk/parameters/time

# cat /sys/module/printk/parameters/time

Y

# echo "sample log message" >/dev/kmsg

# dmesg | tail

....

[3814526.197336] sample log message