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author | Sagi Grimberg <sagi@grimberg.me> | 2019-01-18 16:43:24 -0800 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2019-01-23 17:16:59 -0700 |
commit | b1064d3e337b4d0b67d641b5f771187d8f1f027d (patch) | |
tree | 44c45de7d4d04cfc2af37889866a9171124e44d0 /drivers/nvme/host/rdma.c | |
parent | 39d57757467b6346bbc1a1f416e3057f681cf903 (diff) | |
download | linux-b1064d3e337b4d0b67d641b5f771187d8f1f027d.tar.gz linux-b1064d3e337b4d0b67d641b5f771187d8f1f027d.tar.bz2 linux-b1064d3e337b4d0b67d641b5f771187d8f1f027d.zip |
nvme-rdma: rework queue maps handling
If the device supports less queues than provided (if the device has less
completion vectors), we might hit a bug due to the fact that we ignore
that in nvme_rdma_map_queues (we override the maps nr_queues with user
opts).
Instead, keep track of how many default/read/poll queues we actually
allocated (rather than asked by the user) and use that to assign our
queue mappings.
Fixes: b65bb777ef22 (" nvme-rdma: support separate queue maps for read and write")
Reported-by: Saleem, Shiraz <shiraz.saleem@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/nvme/host/rdma.c')
-rw-r--r-- | drivers/nvme/host/rdma.c | 38 |
1 files changed, 25 insertions, 13 deletions
diff --git a/drivers/nvme/host/rdma.c b/drivers/nvme/host/rdma.c index 4101961feb44..52abc3a6de12 100644 --- a/drivers/nvme/host/rdma.c +++ b/drivers/nvme/host/rdma.c @@ -119,6 +119,7 @@ struct nvme_rdma_ctrl { struct nvme_ctrl ctrl; bool use_inline_data; + u32 io_queues[HCTX_MAX_TYPES]; }; static inline struct nvme_rdma_ctrl *to_rdma_ctrl(struct nvme_ctrl *ctrl) @@ -165,8 +166,8 @@ static inline int nvme_rdma_queue_idx(struct nvme_rdma_queue *queue) static bool nvme_rdma_poll_queue(struct nvme_rdma_queue *queue) { return nvme_rdma_queue_idx(queue) > - queue->ctrl->ctrl.opts->nr_io_queues + - queue->ctrl->ctrl.opts->nr_write_queues; + queue->ctrl->io_queues[HCTX_TYPE_DEFAULT] + + queue->ctrl->io_queues[HCTX_TYPE_READ]; } static inline size_t nvme_rdma_inline_data_size(struct nvme_rdma_queue *queue) @@ -661,8 +662,21 @@ static int nvme_rdma_alloc_io_queues(struct nvme_rdma_ctrl *ctrl) nr_io_queues = min_t(unsigned int, nr_io_queues, ibdev->num_comp_vectors); - nr_io_queues += min(opts->nr_write_queues, num_online_cpus()); - nr_io_queues += min(opts->nr_poll_queues, num_online_cpus()); + if (opts->nr_write_queues) { + ctrl->io_queues[HCTX_TYPE_DEFAULT] = + min(opts->nr_write_queues, nr_io_queues); + nr_io_queues += ctrl->io_queues[HCTX_TYPE_DEFAULT]; + } else { + ctrl->io_queues[HCTX_TYPE_DEFAULT] = nr_io_queues; + } + + ctrl->io_queues[HCTX_TYPE_READ] = nr_io_queues; + + if (opts->nr_poll_queues) { + ctrl->io_queues[HCTX_TYPE_POLL] = + min(opts->nr_poll_queues, num_online_cpus()); + nr_io_queues += ctrl->io_queues[HCTX_TYPE_POLL]; + } ret = nvme_set_queue_count(&ctrl->ctrl, &nr_io_queues); if (ret) @@ -1789,17 +1803,15 @@ static int nvme_rdma_map_queues(struct blk_mq_tag_set *set) struct nvme_rdma_ctrl *ctrl = set->driver_data; set->map[HCTX_TYPE_DEFAULT].queue_offset = 0; - set->map[HCTX_TYPE_READ].nr_queues = ctrl->ctrl.opts->nr_io_queues; + set->map[HCTX_TYPE_DEFAULT].nr_queues = + ctrl->io_queues[HCTX_TYPE_DEFAULT]; + set->map[HCTX_TYPE_READ].nr_queues = ctrl->io_queues[HCTX_TYPE_READ]; if (ctrl->ctrl.opts->nr_write_queues) { /* separate read/write queues */ - set->map[HCTX_TYPE_DEFAULT].nr_queues = - ctrl->ctrl.opts->nr_write_queues; set->map[HCTX_TYPE_READ].queue_offset = - ctrl->ctrl.opts->nr_write_queues; + ctrl->io_queues[HCTX_TYPE_DEFAULT]; } else { /* mixed read/write queues */ - set->map[HCTX_TYPE_DEFAULT].nr_queues = - ctrl->ctrl.opts->nr_io_queues; set->map[HCTX_TYPE_READ].queue_offset = 0; } blk_mq_rdma_map_queues(&set->map[HCTX_TYPE_DEFAULT], @@ -1809,12 +1821,12 @@ static int nvme_rdma_map_queues(struct blk_mq_tag_set *set) if (ctrl->ctrl.opts->nr_poll_queues) { set->map[HCTX_TYPE_POLL].nr_queues = - ctrl->ctrl.opts->nr_poll_queues; + ctrl->io_queues[HCTX_TYPE_POLL]; set->map[HCTX_TYPE_POLL].queue_offset = - ctrl->ctrl.opts->nr_io_queues; + ctrl->io_queues[HCTX_TYPE_DEFAULT]; if (ctrl->ctrl.opts->nr_write_queues) set->map[HCTX_TYPE_POLL].queue_offset += - ctrl->ctrl.opts->nr_write_queues; + ctrl->io_queues[HCTX_TYPE_READ]; blk_mq_map_queues(&set->map[HCTX_TYPE_POLL]); } return 0; |