Re: [PATCH] ahci: Add a generic 'controller2' RAID id

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On Wed, Apr 20, 2022 at 10:50 PM Christoph Hellwig <hch@xxxxxx> wrote:
>
> On Wed, Apr 20, 2022 at 08:27:26PM -0700, Dan Williams wrote:
> > As mentioned here [1], the pain of continuing add new and different
> > device-ids for RAID mode to this file [2] has been heard. Ideally this
> > device-id would not matter and the class code would remain
> > PCI_CLASS_STORAGE_SATA_AHCI regardless of the RAID mode, but other
> > operating systems depend on the class code *not* being AHCI when the
> > device is in RAID mode. That said, going forward there is little reason
> > for new server RAID ids to be added as they can simply reuse one of the
> > existing ids even for a new controller. Server software RAID features
> > continue to be supported on Linux. Client software RAID features
> > continue to be not supported and the recommendation there remains to set
> > the device to AHCI mode in platform firmware.
>
> I thought client switched to vmd as well now?

Yes, I believe so, but the RAID metadata and features like caching etc
are still forked.

> Either way the patch itself looks good:
>
> Reviewed-by: Christoph Hellwig <hch@xxxxxx>

Thanks.



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