> Guest section DW wrote:
> > On Mon, Nov 22, 1999 at
> > This 11 min stuff has other evil effects, as documented:
> > ------ Documentation/rtc.txt ------
> > Also, if the kernel time is synchronized with an external source, the
> > kernel will write the time back to the CMOS clock every 11 minutes. In
> > the process of doing this, the kernel briefly turns off RTC periodic
> > interrupts, so be aware of this if you are doing serious work.
> > ------
> >
> > So, I would be happy if this 11 min stuff would be entirely removed.
>
> For my purposes, the "every 11 minutes" behaviour is great: I run NTP,
> and it gets in sync a few minutes after boot (Just a few hundred ms
> drift since last write to CMOS).
With my current working snapshot of PPSkit-0.9.0pre2, the periodic
update is tunable (turn on/off, select interval), just to find out
how the effects are. Once on this way I thought "go on marching...".
>
> I agree that for people wanting more accuracy, it needs to go. How
> about allowing someone like that to turn off the "write cmos every 11
> minutes:" behaviour?
Try the snapshot (echo 0 >/proc/sys/kernel/time/rtc_update # I think).
Ulrich
Gruß
Uli
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