[LSF/MM/BPF TOPIC] Native SCSI multipath support

[Keith Busch]

On Tue, Feb 17, 2026 at 11:33:12AM -0800, Bart Van Assche wrote:
> More important: what will the performance impact be on SCSI devices that
> do not need multipath support? UFS devices don't need multipath support
> and soon (later this year) will support more than one million IOPS per
> device. Further performance improvements are on the roadmap.

For nvme, we can detect if a device is multipath capable. If not, we
skip the multipath layer altogether so it has no performance impact. I'd
imagine the generic library version would similarly require an opt-in
approach that UFS simply wouldn't subscribe to.