'Twas brillig, and Kay Sievers at 27/04/12 11:03 did gyre and gimble: > > On Apr 27, 2012 2:11 AM, "Colin Guthrie" <[email protected] > <mailto:[email protected]>> wrote: >> >> 'Twas brillig, and Sam Morris at 25/04/12 23:41 did gyre and gimble: >> > On Wed, 25 Apr 2012 11:28:14 -0400, Martin Langhoff wrote: >> > >> >> Apologies if this has been discussed -- a search through the archives >> >> didn't find anything. >> >> >> >> Reading the announcement of systemd v28... >> >> >> >> "At shutdown we no longer invoke "hwclock --systohc", i.e. do not write >> >> the system clock back to the RTC. Why? In general there's not really a >> >> reason to assume that the system clock was anymore correct than the RTC >> >> so it's probably a good idea to leave the RTC untouched." >> > >> > Hm, every time I reboot I'm prompted to run fsck because the last mount >> > time is in the future. Is this the reason? >> >> Yes, this is the reason. > > The real reason is that the extfs tools just make silly assumptions. You > should patch it away or disable that nonsense in the extfs config file, > which is what Fedora does.
Ahh, thanks for the hint. Are there similar tweaks in Fedora for other fs types (xfs, reiser)? >> But that said there should be an automatic sync if you run chrony or >> ntpd every 12s or so at the kernel level. > > Every 11 minutes. I was only out by bit then... :p > The kernel writes to the rtc when ntp puts the kernel > into that mode. > > There is only one piece missing, the kernel syncs not over deltas larger > than 15 or 30 minutes, even when ntp sets the clock to that. That can > get into our way when daylight saving time changes and the rtc is in > localtime. It should be fixed in the kernel, by adding a mode that says > full-sync-if-in-11-minute mode. Thanks, as always, for the insights. Cheers Col -- Colin Guthrie gmane(at)colin.guthr.ie http://colin.guthr.ie/ Day Job: Tribalogic Limited http://www.tribalogic.net/ Open Source: Mageia Contributor http://www.mageia.org/ PulseAudio Hacker http://www.pulseaudio.org/ Trac Hacker http://trac.edgewall.org/ _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
