blk-mq: add blk_mq_start_hw_queues
Add a helper to unconditionally kick contexts of a queue. This will be needed by the SCSI layer to provide fair queueing between multiple devices on a single host. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@fb.com>
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@ -701,6 +701,17 @@ void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx)
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}
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EXPORT_SYMBOL(blk_mq_start_hw_queue);
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void blk_mq_start_hw_queues(struct request_queue *q)
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{
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struct blk_mq_hw_ctx *hctx;
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int i;
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queue_for_each_hw_ctx(q, hctx, i)
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blk_mq_start_hw_queue(hctx);
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}
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EXPORT_SYMBOL(blk_mq_start_hw_queues);
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void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async)
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{
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struct blk_mq_hw_ctx *hctx;
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@ -158,6 +158,7 @@ void blk_mq_complete_request(struct request *rq);
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void blk_mq_stop_hw_queue(struct blk_mq_hw_ctx *hctx);
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void blk_mq_start_hw_queue(struct blk_mq_hw_ctx *hctx);
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void blk_mq_stop_hw_queues(struct request_queue *q);
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void blk_mq_start_hw_queues(struct request_queue *q);
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void blk_mq_start_stopped_hw_queues(struct request_queue *q, bool async);
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void blk_mq_delay_queue(struct blk_mq_hw_ctx *hctx, unsigned long msecs);
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