padata: Initialize the padata queues only for the used cpus (7b389b2c) · Commits · 戴 / test

kernel/padata.c

+5 −9

Original line number	Diff line number	Diff line
		@@ -358,17 +358,15 @@ static struct parallel_data padata_alloc_pd(struct padata_instance pinst,
		if (!alloc_cpumask_var(&pd->cpumask, GFP_KERNEL))
		goto err_free_queue;

		for_each_possible_cpu(cpu) {
		cpumask_and(pd->cpumask, cpumask, cpu_active_mask);

		for_each_cpu(cpu, pd->cpumask) {
		queue = per_cpu_ptr(pd->queue, cpu);

		queue->pd = pd;

		if (cpumask_test_cpu(cpu, cpumask)
		&& cpumask_test_cpu(cpu, cpu_active_mask)) {
		queue->cpu_index = cpu_index;
		cpu_index++;
		} else
		queue->cpu_index = -1;

		INIT_LIST_HEAD(&queue->reorder.list);
		INIT_LIST_HEAD(&queue->parallel.list);
		@@ -382,8 +380,6 @@ static struct parallel_data padata_alloc_pd(struct padata_instance pinst,
		atomic_set(&queue->num_obj, 0);
		}

		cpumask_and(pd->cpumask, cpumask, cpu_active_mask);

		num_cpus = cpumask_weight(pd->cpumask);
		pd->max_seq_nr = (MAX_SEQ_NR / num_cpus) * num_cpus - 1;