Martin and Rob, Op woensdag 27 juli 2016 heeft Rob van der Heij <[email protected]> het volgende geschreven:
> On 27 July 2016 at 14:09, Martin Schwidefsky <[email protected] > <javascript:;>> wrote: > > > > Are you referring to the RTC clock interface of the kernel? If so then > yes, > > that never worked for s390. If you look into drivers/rtc/Kconfig you'll > > find this: > > > > No, I meant the HWCLOCK setting in the startup which tried to read the > RTC > check and then primed the ntp offset with a bogus value. > I believe ntpd uses two files with previous offset and drift. It might be > interesting if you could manufacture those with the proper offset and prime > the ntp offset and do away with the steering. > > > > If I do a "#cp query time" on my z/VM guests I get something like this: > > > > 00: CP QUERY TIME > > 00: TIME IS 14:01:14 CST WEDNESDAY 07/27/16 > > 00: CONNECT= 99:59:59 VIRTCPU= 007:13.79 TOTCPU= 007:35.53 > > > > The interesting part is "CST", which stands for coordinated server time. > > And this does not include leap seconds. That implies that your local time > > for CP and CMS is not in UTC, no? > > > > > No, I believe "CST" is the time zone name. This might be abusing the > abbreviation for "Central Standard Time" as something like "Central Europe > Summer Time". If you do a Q TIMEZONE you may find that it's been set to so > many hours off GMT (or you see it's linked to STP). > > Almost certainly CeST for Böblingen. For some reason I do not really understand, the timezone fields in CP are 4 chars long, only at a few places, the maximum timezone name is limited to 3. Strange if you consider that most official timezone names are 3 or 4 long. A similar odd restriction is in the maximum timezone offset, local time in Kiribati is hard to configure in VM, East 14:00 and officially called LINT. Though there are probably not that many z's installed there. > The logic in z/VM does not have the leap seconds table built-in, so if you > want the right local time then someone must have compensated for the leap > seconds (either by hardware clock UTC or LPAR offset to UTC-TA1). > > Rob > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [email protected] <javascript:;> with the message: > INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 > ---------------------------------------------------------------------- > For more information on Linux on System z, visit > http://wiki.linuxvm.org/ > -- Ronald van der Laan ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
