Re:RDRAND on AMD Ryzen 9 5900X is flakey
by citrin_ru on Monday January 11, 2021 @07:54PM
(#25740771)
Purpose of UUID is to be unique, not random. There is no need to wrap RDRAND into another random generator. One can use time/counter as one part of UUID and kernel provided PRNG, e. g. getrandom(2) for another part.
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Re:RDRAND on AMD Ryzen 9 5900X is flakey
by segfaultbuserr on Monday January 11, 2021 @08:15PM
(#25740972)
> getrandom(2) for another part.
But you cannot use getrandom().
During early boot, the kernel will either block indefinitely and/or log the uninitialized urandom read as a security problem. It was the entire reason that brought systemd's rdrand code into existence.