Hi Harald, On Mon, Nov 07, 2022 at 10:24:42AM +0100, Harald Freudenberger wrote: > Well, I am not sure if this is the right way to go. So by default a > hw rng which does not implement the registration correctly is > rewarded with the implicit assumption that it produces 100% of > entropy. > I see your point - a grep through the kernel code gives the impression > that a whole bunch of registrations is done with an empty quality > field. What about assuming a default quality of 50% if the field > is not filled ? The vast majority of hardware RNGs do *not* work this way. The reasonable assumption is to assume that a hardware RNG provides fully random bits, unless the documentation leads the driver author to specify something less. Really, just quit with all the nutty mailing list stuff here. Next: "how about 74.4% because that matches the vibrations of cedar trees"... If you want this to be different on a particular kernel, you can set your exact value as a command line. This patch here is simply about a sensible default. Jason
