Em 05-03-2014 23:01, Ted Unangst escreveu: > If we're going to discuss things that would be useful, I have for > quite some time wanted a kexec() syscall that loads a new kernel and > reboots into it. I think that would be helpful for a variety of tasks, > not least of which is avoiding the four minute BIOS countdown sequence > on overengineered servers. > > As for FDE, you'd initially boot to a small, normal OpenBSD > installation. Like an initramfs, but not all scrunched up. You login > via ssh and run "kexec /bsd sr0a:password" or something, > which tells the system to reboot with that kernel, except using softraid > as the root partition. > Now we're talking. I thought of this also, didn't looked at the complexity of it yet. Another task where it would be useful, is in overwriting the RAM with /dev/zero or /dev/random. This approach is used on TAILS live cd to wipe the RAM after use.
But I believe, not have looked much at the code yet, that the kexec() approach would be simpler than implementing the pivot_root(). Cheers, -- Giancarlo Razzolini GPG: 4096R/77B981BC
