To enable randomization of the page allocator in the kernel, add the
page_alloc.shuffle=1 argument to the default GRUB 2 command line.
Configure the default Grub2 kernel command line to contain page_alloc.shuffle=1 as follows:
# grub2-editenv - set "$(grub2-editenv - list | grep kernelopts) page_alloc.shuffle=1"