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 07/13] nvme-pci: don't poll from irq context when deleting queues Date: Thu, 29 Nov 2018 20:13:04 +0100 [thread overview] Message-ID: <20181129191310.9795-8-hch@lst.de> (raw) In-Reply-To: <20181129191310.9795-1-hch@lst.de> This is the last place outside of nvme_irq that handles CQEs from interrupt context, and thus is in the way of removing the cq_lock for normal queues, and avoiding lockdep warnings on the poll queues, for which we already take it without IRQ disabling. Signed-off-by: Christoph Hellwig <hch@lst.de> --- drivers/nvme/host/pci.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 9ceba9900ca3..fb8db7d8170a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -203,6 +203,7 @@ struct nvme_queue { unsigned long flags; #define NVMEQ_ENABLED 0 #define NVMEQ_SQ_CMB 1 +#define NVMEQ_DELETE_ERROR 2 u32 *dbbuf_sq_db; u32 *dbbuf_cq_db; u32 *dbbuf_sq_ei; @@ -2216,7 +2217,7 @@ static void nvme_del_cq_end(struct request *req, blk_status_t error) struct nvme_queue *nvmeq = req->end_io_data; if (!error) - nvme_poll_irqdisable(nvmeq, -1); + set_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags); nvme_del_queue_end(req, error); } @@ -2258,11 +2259,20 @@ static bool nvme_disable_io_queues(struct nvme_dev *dev, u8 opcode) nr_queues--; sent++; } - while (sent--) { + while (sent) { + struct nvme_queue *nvmeq = &dev->queues[nr_queues + sent]; + timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); if (timeout == 0) return false; + + /* handle any remaining CQEs */ + if (opcode == nvme_admin_delete_cq && + !test_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags)) + nvme_poll_irqdisable(nvmeq, -1); + + sent--; if (nr_queues) goto retry; } -- 2.19.1
WARNING: multiple messages have this Message-ID (diff)
From: hch@lst.de (Christoph Hellwig) Subject: [PATCH 07/13] nvme-pci: don't poll from irq context when deleting queues Date: Thu, 29 Nov 2018 20:13:04 +0100 [thread overview] Message-ID: <20181129191310.9795-8-hch@lst.de> (raw) In-Reply-To: <20181129191310.9795-1-hch@lst.de> This is the last place outside of nvme_irq that handles CQEs from interrupt context, and thus is in the way of removing the cq_lock for normal queues, and avoiding lockdep warnings on the poll queues, for which we already take it without IRQ disabling. Signed-off-by: Christoph Hellwig <hch at lst.de> --- drivers/nvme/host/pci.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 9ceba9900ca3..fb8db7d8170a 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -203,6 +203,7 @@ struct nvme_queue { unsigned long flags; #define NVMEQ_ENABLED 0 #define NVMEQ_SQ_CMB 1 +#define NVMEQ_DELETE_ERROR 2 u32 *dbbuf_sq_db; u32 *dbbuf_cq_db; u32 *dbbuf_sq_ei; @@ -2216,7 +2217,7 @@ static void nvme_del_cq_end(struct request *req, blk_status_t error) struct nvme_queue *nvmeq = req->end_io_data; if (!error) - nvme_poll_irqdisable(nvmeq, -1); + set_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags); nvme_del_queue_end(req, error); } @@ -2258,11 +2259,20 @@ static bool nvme_disable_io_queues(struct nvme_dev *dev, u8 opcode) nr_queues--; sent++; } - while (sent--) { + while (sent) { + struct nvme_queue *nvmeq = &dev->queues[nr_queues + sent]; + timeout = wait_for_completion_io_timeout(&dev->ioq_wait, timeout); if (timeout == 0) return false; + + /* handle any remaining CQEs */ + if (opcode == nvme_admin_delete_cq && + !test_bit(NVMEQ_DELETE_ERROR, &nvmeq->flags)) + nvme_poll_irqdisable(nvmeq, -1); + + sent--; if (nr_queues) goto retry; } -- 2.19.1
next prev parent reply other threads:[~2018-11-29 19:13 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-29 19:12 block and nvme polling improvements V2 Christoph Hellwig 2018-11-29 19:12 ` Christoph Hellwig 2018-11-29 19:12 ` [PATCH 01/13] block: move queues types to the block layer Christoph Hellwig 2018-11-29 19:12 ` Christoph Hellwig 2018-11-29 19:50 ` Jens Axboe 2018-11-29 19:50 ` Jens Axboe 2018-11-30 7:56 ` Christoph Hellwig 2018-11-30 7:56 ` Christoph Hellwig 2018-11-30 15:20 ` Jens Axboe 2018-11-30 15:20 ` Jens Axboe 2018-11-30 15:21 ` Christoph Hellwig 2018-11-30 15:21 ` Christoph Hellwig 2018-11-29 20:19 ` Keith Busch 2018-11-29 20:19 ` Keith Busch 2018-11-29 20:25 ` Jens Axboe 2018-11-29 20:25 ` Jens Axboe 2018-11-30 8:00 ` Christoph Hellwig 2018-11-30 8:00 ` Christoph Hellwig 2018-11-30 14:40 ` Keith Busch 2018-11-30 14:40 ` Keith Busch 2018-11-30 15:20 ` Jens Axboe 2018-11-30 15:20 ` Jens Axboe 2018-11-29 19:12 ` [PATCH 02/13] nvme-pci: use atomic bitops to mark a queue enabled Christoph Hellwig 2018-11-29 19:12 ` Christoph Hellwig 2018-11-29 20:19 ` Keith Busch 2018-11-29 20:19 ` Keith Busch 2018-11-29 19:13 ` [PATCH 03/13] nvme-pci: cleanup SQ allocation a bit Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 20:22 ` Keith Busch 2018-11-29 20:22 ` Keith Busch 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 2018-11-29 19:13 ` [PATCH 05/13] nvme-pci: consolidate code for polling non-dedicated queues Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 06/13] nvme-pci: refactor nvme_disable_io_queues Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 20:37 ` Keith Busch 2018-11-29 20:37 ` Keith Busch 2018-11-29 19:13 ` Christoph Hellwig [this message] 2018-11-29 19:13 ` [PATCH 07/13] nvme-pci: don't poll from irq context when deleting queues Christoph Hellwig 2018-11-29 20:36 ` Keith Busch 2018-11-29 20:36 ` Keith Busch 2018-11-30 8:08 ` Christoph Hellwig 2018-11-30 8:08 ` Christoph Hellwig 2018-11-30 14:45 ` Keith Busch 2018-11-30 14:45 ` Keith Busch 2018-11-29 19:13 ` [PATCH 08/13] nvme-pci: remove the CQ lock for interrupt driven queues Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 21:08 ` Keith Busch 2018-11-29 21:08 ` Keith Busch 2018-11-30 8:16 ` Christoph Hellwig 2018-11-30 8:16 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 09/13] nvme-rdma: remove I/O polling support Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 10/13] nvme-mpath: " Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 11/13] block: remove ->poll_fn Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 12/13] block: only allow polling if a poll queue_map exists Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig 2018-11-29 19:13 ` [PATCH 13/13] block: enable polling by default if a poll map is initalized Christoph Hellwig 2018-11-29 19:13 ` Christoph Hellwig -- strict thread matches above, loose matches on Subject: below -- 2018-12-02 16:46 block and nvme polling improvements V3 Christoph Hellwig 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 2018-11-21 16:23 block and nvme polling improvements Christoph Hellwig 2018-11-21 16:23 ` [PATCH 07/13] nvme-pci: don't poll from irq context when deleting queues Christoph Hellwig 2018-11-21 16:23 ` Christoph Hellwig
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