kexec is a system call that enables you to load and boot into another kernel from the currently running kernel

To load the new kernel

# kexec -l path/to/kernel --initrd=path/to/initrd --command-line=arguments

To load a new kernel with current boot parameters

# kexec -l path/to/kernel --initrd=path/to/initrd --reuse-cmdline

To execute a currently loaded kernel
# kexec -e

To unload current kexec target kernel

# kexec -u

regards,

T.Dhanasekar