Messages in this thread | | | Date | Thu, 17 Jul 2014 14:39:42 +0200 | From | Daniel Borkmann <> | Subject | Re: [PATCH v3 2/5] random,x86: Add arch_get_slow_rng_u64 |
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On 07/17/2014 12:59 AM, H. Peter Anvin wrote: > On 07/16/2014 03:40 PM, Andy Lutomirski wrote: >> On Wed, Jul 16, 2014 at 3:13 PM, Andy Lutomirski <luto@amacapital.net> 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.
Yep, prandom() is quite heavily used in the network stack where it's traded for speed.
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