[ntp:questions] Can a clock drift be too big for ntpd?

Patrick Nolan pln at glast2.Stanford.EDU
Wed Oct 24 19:06:10 UTC 2007


On 2007-10-23, Patrick Nolan <pln at glast2.Stanford.EDU> wrote:
> On 2007-10-19, Patrick Nolan <pln at glast2.Stanford.EDU> wrote:
>>
>> I realized something since yesterday.  This machine's unique feature is that I
>> compiled a new kernel to add the Reiser file system.  I downloaded the
>> source RPM for the exact version that came with the distro, and the only
>> thing I changed was to enable ReiserFS.
>
> I got a chance to reboot the machine with the original distro kernel,
> without Reiser FS.  The clock problem goes away.  ntpd syncs up and stays
> synced.
>
> My next step will be to make a kernel with Reiser but with HZ reduced from
> 1000 to 250.  Stay tuned for further developments.
>
> This is kernel 2.6.18 running on an Intel Core Duo, 2.4 GHz.

It works.  With kernel HZ reduced to 250 and a Reiser disk mounted,
ntp is able to sync.  I have gone back to a conventional ntp.conf with
multiple servers.




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