Re: [PATCH] printk: add KERN_NOTIME to skip the timestamp

From: Sergey Senozhatsky
Date: Wed Feb 13 2019 - 03:08:58 EST

On (02/13/19 15:14), xiang xiao wrote:
> But how can I precisely control timestamp on/off per message
> through sysfs node?

Hmm. I don't know how many kernel printk-s you have and how often
do you write to kmsg. I was thinking about something like this:

echo 0 > /...printk.../time
dump buffer to /dev/kmsg
echo 1 > /...printk../time

- If you would have several kernel printk-s in the meantime, then
those would not have timestamps, but you kinda can roughly guess

write [1243] foo > /dev/kmsg
write [1244] foo > /dev/kmsg
<< printk(bar) <timestamp ~[1244,1245]>
write [1245] foo > /dev/kmsg

Maybe this won't suffice.