参考
https://www.kernel.org/doc/html/latest/timers/no_hz.html
https://access.redhat.com/articles/3720611
https://access.redhat.com/articles/4200151
https://www.kernel.org/doc/html/latest/admin-guide/kernel-parameters.html
config NO_HZ
布尔值，这是一个旧的动态tick空闲的配置。这个dynticks需要了解具体的概念，这里不介绍。
依赖!ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS
描述：This is the old config entry that enables dynticks idle. We keep it around for a little while to enforce backward compatibility with older config files.
这个配置