blk-mq: Reuse hardware context cpumask for tags

hctx->cpumask is already populated and let the tag cpumask follow that
instead of going through a new for loop.

Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 1 insertions, 8 deletions

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 93a4e1956915..35da31841eda 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1850,6 +1850,7 @@ static void blk_mq_map_swqueue(struct request_queue *q,
                 hctx->tags = set->tags[i];
                 WARN_ON(!hctx->tags);
 
+                cpumask_copy(hctx->tags->cpumask, hctx->cpumask);
                 /*
                  * Set the map size to the number of mapped software queues.
                  * This is more accurate and more efficient than looping
@@ -1863,14 +1864,6 @@ static void blk_mq_map_swqueue(struct request_queue *q,
                 hctx->next_cpu = cpumask_first(hctx->cpumask);
                 hctx->next_cpu_batch = BLK_MQ_CPU_WORK_BATCH;
         }
-
-        queue_for_each_ctx(q, ctx, i) {
-                if (!cpumask_test_cpu(i, online_mask))
-                        continue;
-
-                hctx = q->mq_ops->map_queue(q, i);
-                cpumask_set_cpu(i, hctx->tags->cpumask);
-        }
 }
 
 static void queue_set_hctx_shared(struct request_queue *q, bool shared)