Re: cleanup the RAID6 P/Q library v3
Christoph Hellwig <[email protected]>
| Newsgroups | gmane.linux.ports.ppc64.devel,gmane.linux.kernel,gmane.linux.ports.arm.kernel,gmane.linux.ports.riscv,gmane.linux.kernel.cryptoapi,gmane.comp.file-systems.btrfs,gmane.linux.kernel.cross-arch,gmane.linux.raid |
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| Message-ID | <[email protected]> |
On Fri, Jun 26, 2026 at 05:52:18PM -0700, H. Peter Anvin wrote: > 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 :( Note that the default is still to benchmark the implementations. This is just about the case where the user explicitly disabled that benchmark-based selection.