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Commit 7b389b2c authored by Steffen Klassert's avatar Steffen Klassert Committed by Herbert Xu
Browse files

padata: Initialize the padata queues only for the used cpus 



padata_alloc_pd set up queues for all possible cpus.
This patch changes this to set up the queues just for
the used cpus.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 7d0d2d38

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;