KERNEL_STACK_SIZE
# define KERNEL_STACK_SIZE (B_PAGE_SIZE * 2) // 8 kB
# define KERNEL_STACK_SIZE (B_PAGE_SIZE * 3) // 8 kB + one guard page
#define KERNEL_STACK_SIZE (B_PAGE_SIZE * 4) // 16 kB
#define KERNEL_STACK_SIZE (B_PAGE_SIZE * 3) // 12 kB