[PATCH 0/4] nvme-blkmq fixes

[Keith Busch]

On Tue, 23 Dec 2014, Keith Busch wrote:
> @@ -432,7 +432,8 @@ static void req_completion(struct nvme_queue *nvmeq, void 
> *ctx,
> 		if (!(status & NVME_SC_DNR || blk_noretry_request(req))
> 		    && (jiffies - req->start_time) < req->timeout) {
> 			blk_mq_requeue_request(req);
> -			blk_mq_kick_requeue_list(req->q);
> +			if (!blk_queue_stopped(req->q))
> +				blk_mq_kick_requeue_list(req->q);
> 			return;
> 		}

Oops, experimenting with different things, took the wrong snapshot of
the patch. Should be:

+			if (nvmeq->cq_vector != -1)

rather than:

+			if (!blk_queue_stopped(req->q))

Anyway, I'm going to keep messing with this until I can either hit the
other failures I mentioned or convince myself it's safe before sending
something for official consideration.