On 15/11/2018 16:45, Anand Buddhdev wrote: > Hi folks, > > RHEL 7 documentation says that if either ntp or chrony is running on a > system, then it will enable the kernel feature to sync system time to > the hardware clock every 11 minutes. This needs the CONFIG_RTC_SYSTOHC > option to be set. > > However, it looks like this option is not set for CentOS kernels: > > # fgrep CONFIG_RTC_SYSTOHC /boot/config-3.10.0-862.14.4.el7.x86_64 > # CONFIG_RTC_SYSTOHC is not set > > This explains why on some of our servers, the hardware clock is out of > sync with the system time. > > Does anyone know why this option is not enabled for CentOS kernels? > Because it is not enabled on RHEL kernels. > Regards, > Anand