Configure timestamp format of kernel log?

Question

Is there a way to change the format of timestamp in kernel logs?

It was something like 2012-08-27T8:54:35.939421+03:00 now, I also checked sysctl -a | grep log, nothing found really.

Answer 1

No, see the kernel code in kernel/printk.c, it's hardcoded as:

sprintf(tbuf, "[%5lu.%06lu] ", (unsigned long) t, nanosec_rem / 1000)

All you can do is enable/disable that timestamp. You can have whatever reads /proc/kmsg (syslog, klog...) add the timestamp itself.