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    SubjectRe: [RFC][PATCH] Make cryptoapi non-optional?
    On Aug 15, 2003  23:38 -0500, Matt Mackall wrote:
    > a) extract_entropy (pool->lock)
    > For nitpickers, there remains a vanishingly small possibility that
    > two readers could get identical results from the pool by hitting a
    > window immediately after reseeding, after accounting, _and_ after
    > feedback mixing.

    It wasn't even vanishingly small... We had a problem in our code where
    two readers got the same 64-bit value calling get_random_bytes(), and
    we were depending on this 64-bit value being unique. This problem was
    fixed by putting a spinlock around the call to get_random_bytes().

    Cheers, Andreas
    Andreas Dilger

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