Re: cleanup the RAID6 P/Q library v3

"H. Peter Anvin" <[email protected]> Fri, 26 Jun 2026 17:52:18 -0700

Newsgroups	gmane.linux.ports.riscv,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.ppc64.devel,gmane.linux.kernel.cryptoapi,gmane.comp.file-systems.btrfs,gmane.linux.kernel.cross-arch,gmane.linux.raid
Message-ID	<[email protected]>

On 2026-05-19 01:24, Christoph Hellwig wrote:
> 
> raid6: rework registration of optimized algorithms
> 
>  - avx2 instead of avx512 is probably the right thing for no
>    benchmarking, but if it was intentional (it wasn't), that should
>    be document.  So I'll just switch back to the previous version to
>    keep the state of the art

It is unlikely to be the right thing *going forward*, though.

The very unfortunate performance inversion is likely model-specific. It is one
of those things where you largely would have to have a list of quirks :(

	-hpa