60-90 minutes of downtime for thirty reboots? Hell, I couldn't guarantee that with the tiny
little Dell PE860s I'm working with at the moment - it'd be more like 300 minutes for some of
the larger and more interesting hardware configurations we use in my organisation. Or far
more, when one of those reboots includes an fsck of a multi-terabyte filesystem.
ksplice sounds like a weird kludge at first but I can actually see it being very useful,
particularly for systems running unmodified vendor kernels. It might fail occasionally (and a
1 in 5 failure rate is pretty good for something like this) but that still means 80% fewer