On Thu, 2015-07-16 at 22:12 +1000, Paul Mackerras wrote:
> The hardware RNG on POWER8 and POWER7+ can be relatively slow, since
> it can only supply one 64-bit value per microsecond. Currently we
> read it in arch_get_random_long(), but that slows down reading from
> /dev/urandom since the code in random.c calls arch_get_random_long()
> for every longword read from /dev/urandom.
>
> Since the hardware RNG supplies high-quality entropy on every read, it
> matches the semantics of arch_get_random_seed_long() better than those
> of arch_get_random_long(). Therefore this commit makes the code use
> the hardware RNG only for arch_get_random_seed_{long,int} and not for
> arch_get_random_{long,int}.
>
> Signed-off-by: Paul Mackerras <pau...@samba.org>
Yep seems sensible.
Can you resend and CC some of the random folks, just in case they care.
eg: ty...@mit.edu, keesc...@chromium.org, h...@linux.intel.com.
cheers
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