https://blog.wongcw.com/2022/07/26/%e5%ad%97%e7%af%80%e8%b7%b3%e5%8b%95%e6%ad%a3%e8%b2%a2%e7%8d%bb%e4%bb%a3%e7%a2%bc%e8%ae%93linux%e5%85%a7%e6%a0%b8%e6%9b%b4%e5%bf%ab%e5%9c%b0%e5%95%9f%e5%8b%95kexec%e7%b3%bb%e7%b5%b1/