Re: RAID-6: help wanted

> >I think they can both be updated with read-modify-write:
> >
> >P' = P + D_n + D_n'
> >Q' = Q + g^n * D_n + g^n * D_n'
> 
> It's not a matter of cache-trashing, it's a matter of the fact that very 
> few CPUs have any form of parallel table lookup.  It could be done with 
> dynamic code generation, but that's a whole ball of wax on its own.

Why dynamic?  Are there problems with just pregenerating all 256
optimized codepaths?

-jim
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