Bug#679853: general: Too much downtime during a big dist-upgrade - avoidable with snapshots
> Note that I just did a quick test with kexec-tools in sid on two boxes,
> and kexec failed miserably, so maybe it works perfectly elsewhere, but
> I'm unsure if it's a good idea to rely on it.
Well, the proposed method (if the /var issue is solved) would work
with a plain reboot, too. If the kernel is upgraded, then you'll have
to reboot by whatever method that works for you, anyway.
Alexander E. Patrakov