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nvme-rdma: don't override opts->queue_size

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That is user argument, and theoretically controller limits can change
over time (over reconnects/resets).  Instead, use the sqsize controller
attribute to check queue depth boundaries and use it to the tagset
allocation.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2018-06-19 15:34:13 +03:00 committed by Christoph Hellwig
parent c947657b15
commit 5e77d61cbc
1 changed files with 10 additions and 11 deletions
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21
drivers/nvme/host/rdma.c
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@ -692,7 +692,7 @@ static struct blk_mq_tag_set *nvme_rdma_alloc_tagset(struct nvme_ctrl *nctrl,
set = &ctrl->tag_set;
memset(set, 0, sizeof(*set));
set->ops = &nvme_rdma_mq_ops;
set->queue_depth = nctrl->opts->queue_size;
set->queue_depth = nctrl->sqsize + 1;
set->reserved_tags = 1; /* fabric connect */
set->numa_node = NUMA_NO_NODE;
set->flags = BLK_MQ_F_SHOULD_MERGE;
@ -1975,20 +1975,19 @@ static struct nvme_ctrl *nvme_rdma_create_ctrl(struct device *dev,
goto out_remove_admin_queue;
}
if (opts->queue_size > ctrl->ctrl.maxcmd) {
/* warn if maxcmd is lower than queue_size */
dev_warn(ctrl->ctrl.device,
"queue_size %zu > ctrl maxcmd %u, clamping down\n",
opts->queue_size, ctrl->ctrl.maxcmd);
opts->queue_size = ctrl->ctrl.maxcmd;
}
/* only warn if argument is too large here, will clamp later */
if (opts->queue_size > ctrl->ctrl.sqsize + 1) {
/* warn if sqsize is lower than queue_size */
dev_warn(ctrl->ctrl.device,
"queue_size %zu > ctrl sqsize %u, clamping down\n",
opts->queue_size, ctrl->ctrl.sqsize + 1);
opts->queue_size = ctrl->ctrl.sqsize + 1;
}
/* warn if maxcmd is lower than sqsize+1 */
if (ctrl->ctrl.sqsize + 1 > ctrl->ctrl.maxcmd) {
dev_warn(ctrl->ctrl.device,
"sqsize %u > ctrl maxcmd %u, clamping down\n",
ctrl->ctrl.sqsize + 1, ctrl->ctrl.maxcmd);
ctrl->ctrl.sqsize = ctrl->ctrl.maxcmd - 1;
}
if (opts->nr_io_queues) {