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From: Sagi Grimberg <sagi@grimberg.me>
To: Christoph Hellwig <hch@lst.de>, axboe@fb.com, tglx@linutronix.de
Cc: agordeev@redhat.com, keith.busch@intel.com,
	linux-block@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 11/13] nvme: switch to use pci_alloc_irq_vectors
Date: Fri, 23 Sep 2016 15:21:14 -0700	[thread overview]
Message-ID: <c8150106-764e-f8e9-4c1c-27e60ad96e83@grimberg.me> (raw)
In-Reply-To: <1473862739-15032-12-git-send-email-hch@lst.de>



On 14/09/16 07:18, Christoph Hellwig wrote:
> Use the new helper to automatically select the right interrupt type, as
> well as to use the automatic interupt affinity assignment.

Patch title and the change description are a little short IMO to
describe what is going on here (need the blk-mq side too).

I'd also think it would be better to split this to 2 patches but
really not a must...

> +static int nvme_pci_map_queues(struct blk_mq_tag_set *set)
> +{
> +	struct nvme_dev *dev = set->driver_data;
> +
> +	return blk_mq_pci_map_queues(set, to_pci_dev(dev->dev));
> +}
> +

Question: is using pci_alloc_irq_vectors() obligated for
supplying blk-mq with the device affinity mask?

If I do this completely-untested [1] what will happen?

[1]:
--
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c
index 8d2875b4c56d..76693d406efe 100644
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -1518,6 +1518,14 @@ static void nvme_rdma_complete_rq(struct request *rq)
         blk_mq_end_request(rq, error);
  }

+static int nvme_rdma_map_queues(struct blk_mq_tag_set *set)
+{
+       struct nvme_rdma_ctrl *ctrl = set->driver_data;
+       struct device *dev = ctrl->device->dev.dma_device;
+
+       return blk_mq_pci_map_queues(set, to_pci_dev(dev));
+}
+
  static struct blk_mq_ops nvme_rdma_mq_ops = {
         .queue_rq       = nvme_rdma_queue_rq,
         .complete       = nvme_rdma_complete_rq,
@@ -1528,6 +1536,7 @@ static struct blk_mq_ops nvme_rdma_mq_ops = {
         .init_hctx      = nvme_rdma_init_hctx,
         .poll           = nvme_rdma_poll,
         .timeout        = nvme_rdma_timeout,
+       .map_queues     = nvme_rdma_map_queues,
  };

  static struct blk_mq_ops nvme_rdma_admin_mq_ops = {
--

  reply	other threads:[~2016-09-23 22:21 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-09-14 14:18 blk-mq: allow passing in an external queue mapping V3 Christoph Hellwig
2016-09-14 14:18 ` [PATCH 01/13] genirq/msi: Add cpumask allocation to alloc_msi_entry Christoph Hellwig
2016-09-15 19:00   ` [tip:irq/core] " tip-bot for Thomas Gleixner
2016-09-19  7:30   ` [PATCH 01/13] " Alexander Gordeev
2016-09-19 13:50     ` Christoph Hellwig
2016-09-20  7:06       ` Alexander Gordeev
2016-09-20  8:58         ` Thomas Gleixner
2016-09-14 14:18 ` [PATCH 02/13] genirq/affinity: Provide smarter irq spreading infrastructure Christoph Hellwig
2016-09-15 19:01   ` [tip:irq/core] " tip-bot for Thomas Gleixner
2016-09-21 12:29   ` [PATCH 02/13] " Alexander Gordeev
2016-09-22 21:14     ` Thomas Gleixner
2016-09-14 14:18 ` [PATCH 03/13] genirq/msi: Switch to new " Christoph Hellwig
2016-09-15 19:01   ` [tip:irq/core] " tip-bot for Thomas Gleixner
2016-09-21 12:23   ` [PATCH 03/13] " Alexander Gordeev
2016-09-22  8:51   ` Alexander Gordeev
2016-09-14 14:18 ` [PATCH 04/13] genirq/affinity: Remove old irq spread infrastructure Christoph Hellwig
2016-09-15 19:02   ` [tip:irq/core] " tip-bot for Thomas Gleixner
2016-09-14 14:18 ` [PATCH 05/13] pci/msi: Retrieve affinity for a vector Christoph Hellwig
2016-09-15 19:02   ` [tip:irq/core] " tip-bot for Thomas Gleixner
2016-09-14 14:18 ` [PATCH 06/13] blk-mq: don't redistribute hardware queues on a CPU hotplug event Christoph Hellwig
2016-09-14 14:18 ` [PATCH 07/13] blk-mq: only allocate a single mq_map per tag_set Christoph Hellwig
2016-09-14 14:18 ` [PATCH 08/13] blk-mq: remove ->map_queue Christoph Hellwig
2016-09-14 14:18 ` [PATCH 09/13] blk-mq: allow the driver to pass in a queue mapping Christoph Hellwig
2016-09-14 14:18 ` [PATCH 10/13] blk-mq: provide a default queue mapping for PCI device Christoph Hellwig
2016-09-19  7:33   ` Alexander Gordeev
2016-09-19 13:49     ` Christoph Hellwig
2016-09-14 14:18 ` [PATCH 11/13] nvme: switch to use pci_alloc_irq_vectors Christoph Hellwig
2016-09-23 22:21   ` Sagi Grimberg [this message]
2016-09-26 15:09     ` Christoph Hellwig
2016-09-14 14:18 ` [PATCH 12/13] nvme: remove the post_scan callout Christoph Hellwig
2016-09-14 14:18 ` [PATCH 13/13] blk-mq: get rid of the cpumask in struct blk_mq_tags Christoph Hellwig
2016-09-15 14:44   ` Christoph Hellwig
2016-09-15 14:46     ` Jens Axboe
2016-09-15 14:46       ` Jens Axboe
2016-09-15 14:40 ` blk-mq: allow passing in an external queue mapping V3 Keith Busch
2016-09-15 14:32   ` Christoph Hellwig
2016-09-15 14:34     ` Jens Axboe
2016-09-15 14:34       ` Jens Axboe
2016-09-15 14:42       ` Christoph Hellwig
2016-09-15 14:44         ` Jens Axboe
2016-09-15 14:44           ` Jens Axboe

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