diff options
| author | Christoph Hellwig <hch@lst.de> | 2021-10-12 13:12:26 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-10-18 06:17:36 -0600 |
| commit | c712dccc64357b94f93e57882373e1365f0e2a56 (patch) | |
| tree | 250a7ba95d784e8981aea9d8396276d09581fb87 | |
| parent | a614dd2280356df0c79300c49d82b7e0c8b31f24 (diff) | |
nvme-multipath: enable polled I/O
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>
Link: https://lore.kernel.org/r/20211012111226.760968-17-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | drivers/nvme/host/multipath.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/nvme/host/multipath.c b/drivers/nvme/host/multipath.c index ab78aa5d28c6..11440c86881e 100644 --- a/drivers/nvme/host/multipath.c +++ b/drivers/nvme/host/multipath.c @@ -85,8 +85,13 @@ void nvme_failover_req(struct request *req) } spin_lock_irqsave(&ns->head->requeue_lock, flags); - for (bio = req->bio; bio; bio = bio->bi_next) + for (bio = req->bio; bio; bio = bio->bi_next) { bio_set_dev(bio, ns->head->disk->part0); + if (bio->bi_opf & REQ_POLLED) { + bio->bi_opf &= ~REQ_POLLED; + bio->bi_cookie = BLK_QC_T_NONE; + } + } blk_steal_bios(&ns->head->requeue_list, req); spin_unlock_irqrestore(&ns->head->requeue_lock, flags); @@ -477,6 +482,15 @@ 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); |