quoted

quoted

+static int cpu_to_queue_index(unsigned int nr_queues, const int cpu,
+                  const struct cpumask *online_mask)
  {
-    return cpu * nr_queues / nr_cpus;
+    /*
+     * Non online CPU will be mapped to queue index 0.
+     */
+    if (!cpumask_test_cpu(cpu, online_mask))
+        return 0;

Why not map offline cpus to what they would've map to if they were
online?

I didn't change logic for offline cpu's.
Should it be done in this patch ?

The patch clearly treats offline cpus differently, maps them
to queue 0.