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Commit e0e827b9 authored by Raghavendra K T's avatar Raghavendra K T Committed by Jens Axboe
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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: default avatarRaghavendra K T <raghavendra.kt@linux.vnet.ibm.com>
Reviewed-by: default avatarSagi Grimberg <sagig@mellanox.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 6f3b0e8b

block/blk-mq.c

+1 −8
Original line number Diff line number Diff line
@@ -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)