On Friday 19 May 2017 09:15 AM, AKASHI Takahiro wrote: >>> +to load dump-capture kernel. >>> + >>> + kexec -p <dump-capture-kernel-Image> \ >>> + --initrd=<initrd-for-dump-capture-kernel> \ >>> + --append="root=<root-dev> <arch-specific-options>" >> For uncompressed Image, dtb is not necessary? > Just for clarification, dtb is optional for both vmlinux and Image > on arm64. (This means you can specify it if you want.) > But this is also true for initrd and append(command line) to some extent. Yes, I agree. > > More precisely, whether these parameters are optional or not will > depend on architectures, not formats, I believe. May be not architecture, rather a distro environment. For example, we should be able to work without --initrd for any arch if kernel has been compiled by configuring CONFG_INITRAMFS_SOURCE. ~Pratyush