[systemd-devel] use RTC date/time to set system date time

[Michał Zegan]

W dniu 01.03.2021 o 17:01, Lennart Poettering pisze:
> On Mo, 01.03.21 15:38, Michał Zegan (webczat_200 at poczta.onet.pl) wrote:
> 
>> There are problems with log timestamps when you do that, and it is
>> probably why it was not done.
>> I am wondering if the only correct way isn't to do it in initramfs (if
>> it's systemd) before starting the journald, so that first saved logs
>> have correct timestamps?
> 
> The earlier you have a "correct" clock the better.
> 
> But I mean, journald won't lie to you: the log messages are associated
> with the timestamps that were accurate at the moment they are
> generated. But of course, if your clock sucks then they'll look
> differently than you might expect.
However the initial log entries in journald are taken from dmesg and
dmesg timestamps are relative, so setting the clock before journald
first starts should make journal times correct.
Or I am wrong?
> 
> Lennart
> 
> --
> Lennart Poettering, Berlin
> 

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