From: Christoph Hellwig <hch@lst.de> To: Jens Axboe <axboe@kernel.dk> Cc: Jeffle Xu <jefflexu@linux.alibaba.com>, Ming Lei <ming.lei@redhat.com>, Damien Le Moal <Damien.LeMoal@wdc.com>, Keith Busch <kbusch@kernel.org>, Sagi Grimberg <sagi@grimberg.me>, "Wunderlich, Mark" <mark.wunderlich@intel.com>, "Vasudevan, Anil" <anil.vasudevan@intel.com>, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvme@lists.infradead.org Subject: [PATCH 16/16] nvme-multipath: enable polled I/O Date: Tue, 15 Jun 2021 15:10:34 +0200 [thread overview] Message-ID: <20210615131034.752623-17-hch@lst.de> (raw) In-Reply-To: <20210615131034.752623-1-hch@lst.de> Set the poll queue flag to enable polling, given that the multipath node just dispatches the bios to a lower queue. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> --- drivers/nvme/host/multipath.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index f77b774699de..48ea649d6c24 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -450,6 +450,15 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) blk_queue_flag_set(QUEUE_FLAG_NONROT, head->disk->queue); blk_queue_flag_set(QUEUE_FLAG_NOWAIT, head->disk->queue); + /* + * This assumes all controllers that refer to a namespace either + * support poll queues or not. That is not a strict guarantee, + * but if the assumption is wrong the effect is only suboptimal + * performance but not correctness problem. + */ + if (ctrl->tagset->nr_maps > HCTX_TYPE_POLL && + ctrl->tagset->map[HCTX_TYPE_POLL].nr_queues) + blk_queue_flag_set(QUEUE_FLAG_POLL, head->disk->queue); /* set to a default value of 512 until the disk is validated */ blk_queue_logical_block_size(head->disk->queue, 512); -- 2.30.2
WARNING: multiple messages have this Message-ID (diff)
From: Christoph Hellwig <hch@lst.de> To: Jens Axboe <axboe@kernel.dk> Cc: Jeffle Xu <jefflexu@linux.alibaba.com>, Ming Lei <ming.lei@redhat.com>, Damien Le Moal <Damien.LeMoal@wdc.com>, Keith Busch <kbusch@kernel.org>, Sagi Grimberg <sagi@grimberg.me>, "Wunderlich, Mark" <mark.wunderlich@intel.com>, "Vasudevan, Anil" <anil.vasudevan@intel.com>, linux-block@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nvme@lists.infradead.org Subject: [PATCH 16/16] nvme-multipath: enable polled I/O Date: Tue, 15 Jun 2021 15:10:34 +0200 [thread overview] Message-ID: <20210615131034.752623-17-hch@lst.de> (raw) In-Reply-To: <20210615131034.752623-1-hch@lst.de> Set the poll queue flag to enable polling, given that the multipath node just dispatches the bios to a lower queue. Signed-off-by: Christoph Hellwig <hch@lst.de> Tested-by: Mark Wunderlich <mark.wunderlich@intel.com> --- drivers/nvme/host/multipath.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index f77b774699de..48ea649d6c24 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -450,6 +450,15 @@ int nvme_mpath_alloc_disk(struct nvme_ctrl *ctrl, struct nvme_ns_head *head) blk_queue_flag_set(QUEUE_FLAG_NONROT, head->disk->queue); blk_queue_flag_set(QUEUE_FLAG_NOWAIT, head->disk->queue); + /* + * This assumes all controllers that refer to a namespace either + * support poll queues or not. That is not a strict guarantee, + * but if the assumption is wrong the effect is only suboptimal + * performance but not correctness problem. + */ + if (ctrl->tagset->nr_maps > HCTX_TYPE_POLL && + ctrl->tagset->map[HCTX_TYPE_POLL].nr_queues) + blk_queue_flag_set(QUEUE_FLAG_POLL, head->disk->queue); /* set to a default value of 512 until the disk is validated */ blk_queue_logical_block_size(head->disk->queue, 512); -- 2.30.2 _______________________________________________ Linux-nvme mailing list Linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme
next prev parent reply other threads:[~2021-06-15 13:16 UTC|newest] Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-15 13:10 switch block layer polling to a bio based model v4 Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 01/16] direct-io: remove blk_poll support Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 02/16] block: don't try to poll multi-bio I/Os in __blkdev_direct_IO Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 03/16] iomap: don't try to poll multi-bio I/Os in __iomap_dio_rw Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 04/16] blk-mq: factor out a blk_qc_to_hctx helper Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 05/16] blk-mq: factor out a "classic" poll helper Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 06/16] blk-mq: remove blk_qc_t_to_tag and blk_qc_t_is_internal Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 07/16] blk-mq: remove blk_qc_t_valid Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 08/16] block: replace the spin argument to blk_iopoll with a flags argument Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 09/16] io_uring: don't sleep when polling for I/O Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 10/16] block: rename REQ_HIPRI to REQ_POLLED Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 11/16] block: use SLAB_TYPESAFE_BY_RCU for the bio slab Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 12/16] block: define 'struct bvec_iter' as packed Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 13/16] block: switch polling to be bio based Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-16 2:30 ` Ming Lei 2021-06-16 2:30 ` Ming Lei 2021-06-18 14:01 ` Christoph Hellwig 2021-06-18 14:01 ` Christoph Hellwig 2021-06-18 14:27 ` Ming Lei 2021-06-18 14:27 ` Ming Lei 2021-06-21 7:20 ` Christoph Hellwig 2021-06-21 7:20 ` Christoph Hellwig 2021-06-21 8:35 ` Ming Lei 2021-06-21 8:35 ` Ming Lei 2021-06-15 13:10 ` [PATCH 14/16] block: don't allow writing to the poll queue attribute Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` [PATCH 15/16] nvme-multipath: set QUEUE_FLAG_NOWAIT Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig 2021-06-15 13:10 ` Christoph Hellwig [this message] 2021-06-15 13:10 ` [PATCH 16/16] nvme-multipath: enable polled I/O Christoph Hellwig 2021-06-15 14:37 ` switch block layer polling to a bio based model v4 Keith Busch 2021-06-15 14:37 ` Keith Busch 2021-06-15 16:06 ` Christoph Hellwig 2021-06-15 16:06 ` Christoph Hellwig 2021-10-12 11:12 Christoph Hellwig 2021-10-12 11:12 ` [PATCH 16/16] nvme-multipath: enable polled I/O Christoph Hellwig 2021-10-12 11:12 ` Christoph Hellwig 2021-10-13 10:46 ` Sagi Grimberg 2021-10-13 10:46 ` Sagi Grimberg
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