[PATCH v2] nvme: remove namespaces in parallel

[Keith Busch]

On Tue, 03 Nov 2026 01:28:02 -0500, Qiliang Yuan wrote:
> nvme_remove_namespaces() removes the namespaces of a controller one
> after another. Each removal waits for RCU grace periods in
> del_gendisk() for the namespace and for its multipath head, about
> 20 ms in all.
> 
> Deleting a controller, such as disconnecting from a fabrics target,
> thus takes time proportional to its namespace count, over a second for
> 64 namespaces. Scanning had the same problem until commit 4e893ca81170
> ("nvme_core: scan namespaces asynchronously") made it add namespaces
> in parallel.
> 
> [...]

Thanks, applied to nvme-7.4.

[1/1] nvme: remove namespaces in parallel
      commit: fc991838ef25f1cab9ff34b55b39f16d95ed39b3
--
Keith Busch <kbusch at kernel.org>