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From: Christoph Hellwig <hch@lst.de>
To: Jens Axboe <axboe@fb.com>, Keith Busch <keith.busch@intel.com>,
	Sagi Grimberg <sagi@grimberg.me>
Cc: Max Gurtovoy <maxg@mellanox.com>,
	linux-nvme@lists.infradead.org, linux-block@vger.kernel.org
Subject: [PATCH 04/13] nvme-pci: only allow polling with separate poll queues
Date: Sun,  2 Dec 2018 17:46:19 +0100	[thread overview]
Message-ID: <20181202164628.1116-5-hch@lst.de> (raw)
In-Reply-To: <20181202164628.1116-1-hch@lst.de>

This will allow us to simplify both the regular NVMe interrupt handler
and the upcoming aio poll code.  In addition to that the separate
queues are generally a good idea for performance reasons.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 drivers/nvme/host/pci.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b820dd0351cb..d42bb76e5e78 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1089,13 +1089,6 @@ static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag)
 }
 
 static int nvme_poll(struct blk_mq_hw_ctx *hctx)
-{
-	struct nvme_queue *nvmeq = hctx->driver_data;
-
-	return __nvme_poll(nvmeq, -1);
-}
-
-static int nvme_poll_noirq(struct blk_mq_hw_ctx *hctx)
 {
 	struct nvme_queue *nvmeq = hctx->driver_data;
 	u16 start, end;
@@ -1605,12 +1598,11 @@ static const struct blk_mq_ops nvme_mq_admin_ops = {
 
 static const struct blk_mq_ops nvme_mq_ops = {
 	NVME_SHARED_MQ_OPS,
-	.poll			= nvme_poll,
 };
 
-static const struct blk_mq_ops nvme_mq_poll_noirq_ops = {
+static const struct blk_mq_ops nvme_mq_poll_ops = {
 	NVME_SHARED_MQ_OPS,
-	.poll			= nvme_poll_noirq,
+	.poll			= nvme_poll,
 };
 
 static void nvme_dev_remove_admin(struct nvme_dev *dev)
@@ -2298,10 +2290,10 @@ static int nvme_dev_add(struct nvme_dev *dev)
 	int ret;
 
 	if (!dev->ctrl.tagset) {
-		if (!dev->io_queues[HCTX_TYPE_POLL])
-			dev->tagset.ops = &nvme_mq_ops;
+		if (dev->io_queues[HCTX_TYPE_POLL])
+			dev->tagset.ops = &nvme_mq_poll_ops;
 		else
-			dev->tagset.ops = &nvme_mq_poll_noirq_ops;
+			dev->tagset.ops = &nvme_mq_ops;
 
 		dev->tagset.nr_hw_queues = dev->online_queues - 1;
 		dev->tagset.nr_maps = HCTX_MAX_TYPES;
-- 
2.19.1


WARNING: multiple messages have this Message-ID (diff)
From: hch@lst.de (Christoph Hellwig)
Subject: [PATCH 04/13] nvme-pci: only allow polling with separate poll queues
Date: Sun,  2 Dec 2018 17:46:19 +0100	[thread overview]
Message-ID: <20181202164628.1116-5-hch@lst.de> (raw)
In-Reply-To: <20181202164628.1116-1-hch@lst.de>

This will allow us to simplify both the regular NVMe interrupt handler
and the upcoming aio poll code.  In addition to that the separate
queues are generally a good idea for performance reasons.

Signed-off-by: Christoph Hellwig <hch at lst.de>
---
 drivers/nvme/host/pci.c | 18 +++++-------------
 1 file changed, 5 insertions(+), 13 deletions(-)

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index b820dd0351cb..d42bb76e5e78 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -1089,13 +1089,6 @@ static int __nvme_poll(struct nvme_queue *nvmeq, unsigned int tag)
 }
 
 static int nvme_poll(struct blk_mq_hw_ctx *hctx)
-{
-	struct nvme_queue *nvmeq = hctx->driver_data;
-
-	return __nvme_poll(nvmeq, -1);
-}
-
-static int nvme_poll_noirq(struct blk_mq_hw_ctx *hctx)
 {
 	struct nvme_queue *nvmeq = hctx->driver_data;
 	u16 start, end;
@@ -1605,12 +1598,11 @@ static const struct blk_mq_ops nvme_mq_admin_ops = {
 
 static const struct blk_mq_ops nvme_mq_ops = {
 	NVME_SHARED_MQ_OPS,
-	.poll			= nvme_poll,
 };
 
-static const struct blk_mq_ops nvme_mq_poll_noirq_ops = {
+static const struct blk_mq_ops nvme_mq_poll_ops = {
 	NVME_SHARED_MQ_OPS,
-	.poll			= nvme_poll_noirq,
+	.poll			= nvme_poll,
 };
 
 static void nvme_dev_remove_admin(struct nvme_dev *dev)
@@ -2298,10 +2290,10 @@ static int nvme_dev_add(struct nvme_dev *dev)
 	int ret;
 
 	if (!dev->ctrl.tagset) {
-		if (!dev->io_queues[HCTX_TYPE_POLL])
-			dev->tagset.ops = &nvme_mq_ops;
+		if (dev->io_queues[HCTX_TYPE_POLL])
+			dev->tagset.ops = &nvme_mq_poll_ops;
 		else
-			dev->tagset.ops = &nvme_mq_poll_noirq_ops;
+			dev->tagset.ops = &nvme_mq_ops;
 
 		dev->tagset.nr_hw_queues = dev->online_queues - 1;
 		dev->tagset.nr_maps = HCTX_MAX_TYPES;
-- 
2.19.1

  parent reply	other threads:[~2018-12-02 16:47 UTC|newest]

Thread overview: 86+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-12-02 16:46 block and nvme polling improvements V3 Christoph Hellwig
2018-12-02 16:46 ` Christoph Hellwig
2018-12-02 16:46 ` [PATCH 01/13] block: move queues types to the block layer Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  0:49   ` Sagi Grimberg
2018-12-04  0:49     ` Sagi Grimberg
2018-12-04 15:00     ` Christoph Hellwig
2018-12-04 15:00       ` Christoph Hellwig
2018-12-04 17:08       ` Sagi Grimberg
2018-12-04 17:08         ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 02/13] nvme-pci: use atomic bitops to mark a queue enabled Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  0:54   ` Sagi Grimberg
2018-12-04  0:54     ` Sagi Grimberg
2018-12-04 15:04     ` Christoph Hellwig
2018-12-04 15:04       ` Christoph Hellwig
2018-12-04 17:11       ` Sagi Grimberg
2018-12-04 17:11         ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 03/13] nvme-pci: cleanup SQ allocation a bit Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  0:55   ` Sagi Grimberg
2018-12-04  0:55     ` Sagi Grimberg
2018-12-02 16:46 ` Christoph Hellwig [this message]
2018-12-02 16:46   ` [PATCH 04/13] nvme-pci: only allow polling with separate poll queues Christoph Hellwig
2018-12-03 18:23   ` Keith Busch
2018-12-03 18:23     ` Keith Busch
2018-12-04  0:56   ` Sagi Grimberg
2018-12-04  0:56     ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 05/13] nvme-pci: consolidate code for polling non-dedicated queues Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  0:58   ` Sagi Grimberg
2018-12-04  0:58     ` Sagi Grimberg
2018-12-04 15:04     ` Christoph Hellwig
2018-12-04 15:04       ` Christoph Hellwig
2018-12-04 17:13       ` Sagi Grimberg
2018-12-04 17:13         ` Sagi Grimberg
2018-12-04 18:19         ` Jens Axboe
2018-12-04 18:19           ` Jens Axboe
2018-12-02 16:46 ` [PATCH 06/13] nvme-pci: refactor nvme_disable_io_queues Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  1:00   ` Sagi Grimberg
2018-12-04  1:00     ` Sagi Grimberg
2018-12-04 15:05     ` Christoph Hellwig
2018-12-04 15:05       ` Christoph Hellwig
2018-12-04 18:19       ` Jens Axboe
2018-12-04 18:19         ` Jens Axboe
2018-12-02 16:46 ` [PATCH 07/13] nvme-pci: don't poll from irq context when deleting queues Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-03 18:15   ` Keith Busch
2018-12-03 18:15     ` Keith Busch
2018-12-04  1:05   ` Sagi Grimberg
2018-12-04  1:05     ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 08/13] nvme-pci: remove the CQ lock for interrupt driven queues Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  1:08   ` Sagi Grimberg
2018-12-04  1:08     ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 09/13] nvme-rdma: remove I/O polling support Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-02 16:46 ` [PATCH 10/13] nvme-mpath: " Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-03 18:22   ` Keith Busch
2018-12-03 18:22     ` Keith Busch
2018-12-04  1:11   ` Sagi Grimberg
2018-12-04  1:11     ` Sagi Grimberg
2018-12-04 15:07     ` Christoph Hellwig
2018-12-04 15:07       ` Christoph Hellwig
2018-12-04 17:18       ` Sagi Grimberg
2018-12-04 17:18         ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 11/13] block: remove ->poll_fn Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  1:11   ` Sagi Grimberg
2018-12-04  1:11     ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 12/13] block: only allow polling if a poll queue_map exists Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  1:14   ` Sagi Grimberg
2018-12-04  1:14     ` Sagi Grimberg
2018-12-02 16:46 ` [PATCH 13/13] block: enable polling by default if a poll map is initalized Christoph Hellwig
2018-12-02 16:46   ` Christoph Hellwig
2018-12-04  1:14   ` Sagi Grimberg
2018-12-04  1:14     ` Sagi Grimberg
2018-12-04 18:40 ` block and nvme polling improvements V3 Jens Axboe
2018-12-04 18:40   ` Jens Axboe
  -- strict thread matches above, loose matches on Subject: below --
2018-11-29 19:12 block and nvme polling improvements V2 Christoph Hellwig
2018-11-29 19:13 ` [PATCH 04/13] nvme-pci: only allow polling with separate poll queues Christoph Hellwig
2018-11-29 19:13   ` Christoph Hellwig
2018-11-21 16:23 block and nvme polling improvements Christoph Hellwig
2018-11-21 16:23 ` [PATCH 04/13] nvme-pci: only allow polling with separate poll queues Christoph Hellwig
2018-11-21 16:23   ` Christoph Hellwig

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