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SubjectRe: [PATCH] lib/raid6: Add AVX2 optimized recovery functions
On Fri, Nov 09, 2012 at 10:50:25PM +1100, Neil Brown wrote:
> On Fri, 09 Nov 2012 12:39:05 +0100 "H. Peter Anvin" <hpa@zytor.com> wrote:
>
> > Sorry, we cannot share those at this time since the hardwarenis not yet released.
>
> Can I take that to imply "Acked-by: "H. Peter Anvin" <hpa@zytor.com>" ??
>
> It would be nice to have at least a statement like:
> These patches have been tested both with the user-space testing tool and in
> a RAID6 md array and the pass all test. While we cannot release performance
> numbers as the hardwere is not released, we can confirm that on that hardware
> the performance with these patches is faster than without.
>
> I guess I should be able to assume that - surely the patches would not be
> posted if it were not true... But I like to avoid assuming when I can.

Hi Neil,

That assumption is correct. The patch was tested and benchmarked before submission.

You'll notice that this code is very similar to the SSSE3-optimized
recovery routines I wrote earlier. This implementation extends that same
algorithm from 128-bit registers to 256-bit registers.

Thanks.

--
Jim Kukunas
Intel Open Source Technology Center
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