On 2010-03-24, Rick Jones <[email protected]> wrote: >> > On the other hand recent Linux kernels have screwed up the basic >> > calibration on startup so rebooting a machine is much worse than a >> > temperature change. (If they have fixed it recently, I haven't >> > seen any announcement. You can fix it by hacking a constant into >> > your kernel.) > >> Yes, it seems to be fixed. My machines with the more recent kernels >> are getting about 10PPM out, while the older ones with the >> calibration problems are more like 100-200PPM out. and varying by >> 50PPM or so between boots. > > Which kernel versions are we talking about here, and are the fixes > backported to distro kernels?
Mandriva 2008.1 has the problems ( kernel 2.6.24 various Mandriva versions. ) Mandriva 2010.0 ( kernel 2.6.31 various versions) does not seem to have the problem. I do not think that it is Mandriva backported patches, but the kernel itself, but could not swear to it. I have not made an extensive study since chrony does a good job of compensating for the problems-- fast convergence after reboot-- so I have not worried about it too much. > > rick jones _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
