Re: SSSE6 / RAID6

[Mathias Burén <mathias.buren@xxxxxxxxx>]

On 23 May 2012 01:26, Jim Kukunas <james.t.kukunas@xxxxxxxxxxxxxxx> wrote:
> On Wed, May 23, 2012 at 12:37:32AM +0100, Mathias Burén wrote:
>> On 22 May 2012 23:18, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
>> > On 05/22/2012 02:27 PM, Mathias Burén wrote:
>> >> Hi list,
>> >>
>> >> I just compiled 3.4 for my little Atom box. Is there any way I can
>> >> confirm if the RAID6 check is using SSSE6 instructions?
>
> <snip>
>
> The _SSSE3_ RAID6 recovery functions are in Neil's for-next tree. They aren't
> in 3.4.
>
> If they were, you'd see something like:
>
> % dmesg | grep ssse3
> [    0.167849] raid6: using ssse3x1 recovery algorithm
>
>
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>
> --
> Jim Kukunas
> Intel Open Source Technology Center

Aha, that makes sense now. (Neil; I meant SSSE3. Obviously SSSE3 +
RAID6 becomes SSSE6 ;))

Perhaps I can cherry pick these patches and apply them to 3.4.

Mathias
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