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virtio_blk: implement mq_ops->commit_rqs() hook
We need this for blk-mq to kick things into gear, if we told it that we had more IO coming, but then failed to deliver on that promise. Reviewed-by: Omar Sandoval <osandov@fb.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Ming Lei <ming.lei@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
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1 changed files with 15 additions and 0 deletions
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@ -214,6 +214,20 @@ static void virtblk_done(struct virtqueue *vq)
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spin_unlock_irqrestore(&vblk->vqs[qid].lock, flags);
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}
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static void virtio_commit_rqs(struct blk_mq_hw_ctx *hctx)
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{
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struct virtio_blk *vblk = hctx->queue->queuedata;
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struct virtio_blk_vq *vq = &vblk->vqs[hctx->queue_num];
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bool kick;
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spin_lock_irq(&vq->lock);
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kick = virtqueue_kick_prepare(vq->vq);
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spin_unlock_irq(&vq->lock);
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if (kick)
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virtqueue_notify(vq->vq);
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}
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static blk_status_t virtio_queue_rq(struct blk_mq_hw_ctx *hctx,
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const struct blk_mq_queue_data *bd)
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{
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@ -638,6 +652,7 @@ static void virtblk_initialize_rq(struct request *req)
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static const struct blk_mq_ops virtio_mq_ops = {
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.queue_rq = virtio_queue_rq,
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.commit_rqs = virtio_commit_rqs,
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.complete = virtblk_request_done,
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.init_request = virtblk_init_request,
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#ifdef CONFIG_VIRTIO_BLK_SCSI
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