Re: [PATCH v3 2/5] random,x86: Add arch_get_slow_rng_u64

[H. Peter Anvin]

On 07/16/2014 03:40 PM, Andy Lutomirski wrote:
> On Wed, Jul 16, 2014 at 3:13 PM, Andy Lutomirski <luto@xxxxxxxxxxxxxx> wrote:
>> My personal preference is to defer this until some user shows up.  I
>> think that even this would be too complicated for KASLR, which is the
>> only extremely early-boot user that I found.
>>
>> Hmm.  Does the prandom stuff want to use this?
> 
> prandom isn't even using rdrand.  I'd suggest fixing this separately,
> or even just waiting until someone goes and deletes prandom.
> 

prandom is exactly the opposite; it is designed for when we need
possibly low quality random numbers very quickly.  RDRAND is actually
too slow.

	-hpa


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