(I haven't collected steal values, so the numbers don't sum up to 100%.)
I'd be grateful if this discrepancy could be cleared up eventually!
It's heartening to see some progress after more than three years. :)

Actually, as Munin doesn't half the idle and iowait values, but
truncates the (then overflowing) graph at 100%, I was rather surprised
to see iowait completely disappear after the kernel upgrade, and
concluded that it was somehow converted into buggy-looping in blkfront.
Now I see this isn't the case, but the steadily increasing system CPU
usage between reboots is still a mystery.  I'll start a separate thread
for that, just wanted to provide some motivation for this topic.
--
Thanks,
Feri.