Comment # 7 on bug 1184069 from Ulrich Windl

I don't know how the iterations count is determined, but it might be too high.
Here I have 2286970 key slot iterations and 145635 MK iterations, resulting in
more than 10 seconds.
I'm aware that the paranoid might want a long time like 30 seconds to decrypt
the key, but my guess is the average user is quite happy with 3 to 5 seconds.
Maybe just make parameters configurable, or allow "expert setup" (manually
creating the LUKS device).