Hehe you&#x27;d be &#x2F;amazed&#x2F; how much smaller the kernel gets it you don&#x27;t put in IPv4&#x2F;6 -- and let me tell you, when you upload via uart, every little helps :-)<p>My fav method is to build a kernel with just busybox using my minifs [0], making sure I have kexec support in that kernel.<p>Once booted, I can upload a new kernel via zmodem, and kexec straight into the new kernel. Rince, repeat!<p>You can also use zmodem to upload new binaries to a system, even if it&#x27;s an initramfs, without having to do a full rebuild&#x2F;reboot. Quite handy.<p>[0]: <a href="https:&#x2F;&#x2F;github.com&#x2F;buserror&#x2F;minifs" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;buserror&#x2F;minifs</a>