[PATCHv2 2/3] nvme-multipath: rescan siblings on last path removal

[Christoph Hellwig]

On Thu, Feb 26, 2026 at 10:32:15AM -0800, Keith Busch wrote:
> From: Keith Busch <kbusch at kernel.org>
> 
> When a controller's scan removes the last path to a multipath namespace
> head, sibling controllers in the same subsystem may need to rescan. A
> concurrent scan on another controller could have encountered the stale
> head with mismatched identifiers (e.g. from a recycled NSID) and failed
> to set up the namespace. Without notification, the sibling won't retry
> until the next AEN or explicit rescan.
> 
> After a scan that performed last-path removals, notify all controllers
> in the subsystem to rescan by requeueing their scan work. This ensures
> that recycled NSIDs are promptly discovered by sibling controllers.

Looks good:

Reviewed-by: Christoph Hellwig <hch at lst.de>