[CentOS] CONFIG_RTC_SYSTOHC not set for CentOS kernels

Thu Nov 15 17:09:15 UTC 2018
Phil Perry <pperry at elrepo.org>

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