On Mon, Aug 23, 2021 at 10:16:23AM -0700, Sagi Grimberg wrote:

quoted

+void nvme_mpath_revalidate_paths(struct nvme_ns *ns)
+{
+	struct nvme_ns_head *head = ns->head;
+	sector_t capacity = get_capacity(head->disk);
+	int node;
+
+	for_each_node(node)
+		rcu_assign_pointer(head->current_path[node], NULL);
+
+	list_for_each_entry_rcu(ns, &head->list, siblings) {
+		if (capacity != get_capacity(ns->disk))
+			clear_bit(NVME_NS_READY, &ns->flags);
+	}

Shouldn't the null setting to current_path come after
we clear NVME_NS_READY on the ns? Otherwise we may still
submit and current_path will be populated with the ns
again...

Ahh, I got it this time! Yes, you are right. I think Christoph has
dropped this patch from the nvme-5.15 queue anyway. I'll resend a new
version with the order changed.

Daniel

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