On Fri, Aug 12, 2016 at 06:03:18PM -0700, Gayatri Kammela wrote:

This is the version 2 patch series for adding AVX512 optimized gen_syndrome,
xor_syndrome and recovery functions.

Optimization of RAID6 using AVX512 instructions should improve the
RAID6 performance.These patches are tested and observed the improvement
in performance.

Changes since v1:
1) Added xor_syndrome functions to avx512 optimized raid6.

Gayatri Kammela (6):
  lib/raid6: Add AVX512 optimized gen_syndrome functions
  lib/raid6: Add AVX512 optimized recovery functions
  lib/raid6/test/Makefile: Add avx512 gen_syndrome and recovery
    functions
  lib/raid6: Add AVX512 optimized xor_syndrome functions
  (DO NOT APPLY) lib/raid6: Add unroll by 8 to AVX512 optimized
    gen_syndrome functions
  (DO NOT APPLY) lib/raid6: Add unroll by 8 to AVX512 optimized    
    xor_syndrome functions.

 arch/x86/Makefile        |   5 +-
 include/linux/raid/pq.h  |   5 +
 lib/raid6/Makefile       |   2 +-
 lib/raid6/algos.c        |  13 +
 lib/raid6/avx512.c       | 972 +++++++++++++++++++++++++++++++++++++++++++++++
 lib/raid6/recov_avx512.c | 388 +++++++++++++++++++
 lib/raid6/test/Makefile  |   5 +-
 lib/raid6/x86.h          |  10 +
 8 files changed, 1396 insertions(+), 4 deletions(-)
 create mode 100644 lib/raid6/avx512.c
 create mode 100644 lib/raid6/recov_avx512.c

Hi,

I applied the first 4 patches, but I'm not familiar with the new instructions
and nor have the hardware to test them, so only have limited check.

Thanks,
Shaohua