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authorChristoph Hellwig <hch@lst.de>2017-06-26 12:20:56 +0200
committerThomas Gleixner <tglx@linutronix.de>2017-06-28 23:00:06 +0200
commit5f042e7cbd9ebd3580077dcdc21f35e68c2adf5f (patch)
tree342e26fb18f34d6e702e21f5384da75f951ddce8 /block/blk-mq-cpumap.c
parentgenirq: Avoid unnecessary low level irq function calls (diff)
downloadlinux-5f042e7cbd9ebd3580077dcdc21f35e68c2adf5f.tar.xz
linux-5f042e7cbd9ebd3580077dcdc21f35e68c2adf5f.zip
blk-mq: Include all present CPUs in the default queue mapping
This way we get a nice distribution independent of the current cpu online / offline state. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Jens Axboe <axboe@kernel.dk> Cc: Keith Busch <keith.busch@intel.com> Cc: linux-block@vger.kernel.org Cc: linux-nvme@lists.infradead.org Link: http://lkml.kernel.org/r/20170626102058.10200-2-hch@lst.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'block/blk-mq-cpumap.c')
-rw-r--r--block/blk-mq-cpumap.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/block/blk-mq-cpumap.c b/block/blk-mq-cpumap.c
index 8e61e8640e17..5eaecd40f701 100644
--- a/block/blk-mq-cpumap.c
+++ b/block/blk-mq-cpumap.c
@@ -35,7 +35,6 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
{
unsigned int *map = set->mq_map;
unsigned int nr_queues = set->nr_hw_queues;
- const struct cpumask *online_mask = cpu_online_mask;
unsigned int i, nr_cpus, nr_uniq_cpus, queue, first_sibling;
cpumask_var_t cpus;
@@ -44,7 +43,7 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
cpumask_clear(cpus);
nr_cpus = nr_uniq_cpus = 0;
- for_each_cpu(i, online_mask) {
+ for_each_present_cpu(i) {
nr_cpus++;
first_sibling = get_first_sibling(i);
if (!cpumask_test_cpu(first_sibling, cpus))
@@ -54,7 +53,7 @@ int blk_mq_map_queues(struct blk_mq_tag_set *set)
queue = 0;
for_each_possible_cpu(i) {
- if (!cpumask_test_cpu(i, online_mask)) {
+ if (!cpumask_test_cpu(i, cpu_present_mask)) {
map[i] = 0;
continue;
}