MIN_KERNEL_ALIGN_LG2   15 arch/x86/include/asm/boot.h #define MIN_KERNEL_ALIGN_LG2	PMD_SHIFT
MIN_KERNEL_ALIGN_LG2   17 arch/x86/include/asm/boot.h #define MIN_KERNEL_ALIGN_LG2	(PAGE_SHIFT + THREAD_SIZE_ORDER)