On 3/10/26 12:49, John Garry wrote:
Now that ALUA is supported, we can maintain sdev->access_state.
However, preferred_path is still not maintained as that that is related
to transitioning state and we do not yet support that (for SCSI
multipath).
There is an issue with the preferred path in general, namely that it
overlays the ALUA states (ie you can have 'acive/non-optimized' _and_
the preferred path bit set). So it only makes sense for explicit ALUA
as then the preferred path bit gives us an indicator that we might /
should switch paths.
If we restrict ourselves to implicit ALUA (which I'm advocating anyway
for scsi-multipath) the preferred path becomes rather pointless as
we cannot influence path selection at all.
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
[email protected] +49 911 74053 688
SUSE Software Solutions GmbH, Frankenstr. 146, 90461 Nürnberg
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