Re: [PATCH 01/16] math128: Introduce various 128bit primitives

[Peter Zijlstra]

On Fri, 2012-10-26 at 12:36 +0200, Thomas Gleixner wrote:
> By all means. nsec precision is a completly academic thought
> exercise. It's really pointless to even think about anything below
> microseconds resolution.
> 
> We can still have the user space interface handing in the information
> in nsec resolution, but it's reasonable to scale it down to something
> useful. Just shift the incoming information right by 10, so you're in
> the 1us resolution for all the internal math and all your limitation
> problems are gone. A shift by ten for converting back and forth to
> nsecs is not a real performance issue.

I'm fine with that.. all I wanted was to not have the undefined overflow
we initially had.

I had hoped the u128 stuff might be elsewise useful, but if we don't
want to go there, that's fine.
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