__attribute__
https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Function-Attributes.html#Function-Attributes
https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Type-Attributes.html#Type-Attributes
https://gcc.gnu.org/onlinedocs/gcc-4.0.0/gcc/Variable-Attributes.html#Variable-Attributes
percpu
https://zhuanlan.zhihu.com/p/260986194
kvm_shared_msrs
https://oenhan.com/kvm_shared_msrs
slab 内存分配
https://zhuanlan.zhihu.com/p/105582468
https://zhuanlan.zhihu.com/p/106106008
CPU hotplug
https://www.kernel.org/doc/html/latest/core-api/cpu_hotplug.html