Re: [PATCH 1/4] md: Factor out RAID6 algorithms into lib/

H. Peter Anvin
2009-07-29T18:16:49Z

>>
>> http://www.cs.utk.edu/~plank/plank/papers/CS-96-332.html even describes an
>> implementation _very_ similar to the current code, right down to using a
>> table for the logarithm and inverse logarithm calculations.
>>

We don't use a table for logarithm and inverse logarithm calculations.
Any time you do a table lookup you commit suicide from a performance
standpoint.

-hpa