On 2010-06-26, David Woolley <[email protected]> wrote: > unruh wrote: >> >> Linux, depending on the setting of a flag in the adjtimex setup, sets >> the rtc from the system time once every 11 min. . This is a disaster if > > I think you missed Dave Mills' point that ntpd does this every 60 > minutes, so will also break mechanisms for compensating for RTC drift > whilst the processor is powered down.
His point seemed to be that a) He did not know aboutthe Linux 11 min mode (a statement that may have been a rheotorical device) and b) that ntp did it every 60 min. I do hope that ntp's mechanismcan be switched off by some option. That 60 min mode is as silly as the 11 min mode (except giving the rtc more time to drift if wha you want is to minimize the rtc offset while the computer is running and rtc is never used.) Of course this is in the context of VM using the rtc driver to read the underlying system clock, a misuse of the rtc concept IMHO, and either mode would be a disaster if the rtc driver on the VM actually had permission to change the system clock on the underlying real machine. _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
