[Mageia-dev] Freeze Push: e2fsprogs

Sat May 5 19:26:03 CEST 2012

05.05.2012 19:42, Colin Guthrie kirjoitti:
+> 'Twas brillig, and David Walser at 05/05/12 17:15 did gyre and gimble:
+>> Colin Guthrie wrote:
+>>> This is why the kernel will automatically does the sync for you every 12
+>>> minutes when an ntp daemon is running. This is the recommended method.
+>>
+>> How does the kernel know when an ntp daemon is running in user space?  Does it work with chrony, or only ntpd?
+> 
+> I don't know the internals. It works with either chrony or ntpd.
+> 
+>>> So unless we have a proper frame of reference, (user set time, ntp
+>>> protocol time) then there should be no manual sync.
+>>
+>> Does the kernel then sync the hwclock when you change the time manually, including with rdate or ntpdate?
+> 
+> It won't do it automatically when doing that. It's really up to whatever
+> tool changes the date/time to do that as needed I think.
+
+And how could such a tool know if RTC should be set to UTC or local time?
+
+.. or are we expected to patch them to parse /etc/sysconfig/clock for that?
+
+
+Well, I guess the tool could detect that by looking at the RTC/sysclock
+offset as well, though seems a bit hacky...
+
+What is the expected "right way" to do it, if systemd policy is to not
+sync on shutdown?
+
+-- 
+Anssi Hannula
+