diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-09-11 10:51:29 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-10-02 00:16:14 +0300 |
| commit | f333444708f82c4a4d3ccac004da0bfd9cfdfa42 (patch) | |
| tree | a1aace9b855c7d01119f521179babf11eb941f2d /drivers/nvme/host/core.c | |
| parent | 73383adfad245bb84e6d6ef7830f01048fcfc217 (diff) | |
| download | linux-f333444708f82c4a4d3ccac004da0bfd9cfdfa42.tar.xz | |
nvme: take node locality into account when selecting a path
Make current_path an array with an entry for every possible node, and
cache the best path on a per-node basis. Take the node distance into
account when selecting it. This is primarily useful for dual-ported PCIe
devices which are connected to PCIe root ports on different sockets.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Diffstat (limited to 'drivers/nvme/host/core.c')
| -rw-r--r-- | drivers/nvme/host/core.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 089d744e5065..2db33a752e2b 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2908,9 +2908,14 @@ static struct nvme_ns_head *nvme_alloc_ns_head(struct nvme_ctrl *ctrl, unsigned nsid, struct nvme_id_ns *id) { struct nvme_ns_head *head; + size_t size = sizeof(*head); int ret = -ENOMEM; - head = kzalloc(sizeof(*head), GFP_KERNEL); +#ifdef CONFIG_NVME_MULTIPATH + size += num_possible_nodes() * sizeof(struct nvme_ns *); +#endif + + head = kzalloc(size, GFP_KERNEL); if (!head) goto out; ret = ida_simple_get(&ctrl->subsys->ns_ida, 1, 0, GFP_KERNEL); |