Re: [PATCH v1 00/16] ext4: Add metadata checksumming

[Martin K. Petersen]

>>>>> "Andi" == Andi Kleen <andi@xxxxxxxxxxxxxx> writes:

>> On Westmere and beyond it is possible to accelerate generic CRC
>> calculation using the PCLMULQDQ operation. There are many of our CRC

Andi> Faster than the lookup table? That's hard to believe.

Using PCLMULQDQ you can parallelize the calculation. You can even boost
hw CRC32C performance that way.

  http://download.intel.com/design/intarch/papers/323405.pdf

  http://download.intel.com/design/intarch/papers/323102.pdf

-- 
Martin K. Petersen	Oracle Linux Engineering
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