kdump文档
https://www.kernel.org/doc/Documentation/kdump/
如何在Ubuntu18.04下安装和配置kdump
linux kexec 介绍
ubuntu 16.04 安装配置kdump
CHAPTER 48. INSTALLING AND CONFIGURING KDUMP
制作initrd.img
https://blog.csdn.net/qq_26884501/article/details/112311201
调试运行中的linux
crash vmlinux
或者crash /dev/mem vmlinux
或者crash /proc/kcore vmlinux
触发
echo 1 > /proc/sys/kernel/sysrq
echo c > /proc/sysrq-trigger