**** BEGIN LOGGING AT Tue Jun 06 03:00:03 2017 Jun 06 04:13:41 Varti: The real_root is indeed designed when using a initramfs. As ant suggested, just use root=/dev/sda2 and make sure you specify the filesystem if needed as kernel parameter. Kexecboot can find the kernel on ext3 and boot it. The kernel needs to look for the root on /dev/sda2. Your fstab needs to contain a valid / entry and a /boot entry ideally. Jun 06 04:17:23 /dev/sda2 / f2fs rw,relatime,background_gc=on,inline_data,extent_cache,active_logs=6 0 0 Jun 06 04:17:44 /dev/sda1 /boot ext4 rw,relatime,data=ordered 0 2 Jun 06 04:17:48 as an example Jun 06 04:18:55 just use ext4 instead of ext3 :) **** ENDING LOGGING AT Wed Jun 07 03:00:03 2017