[PATCHv3 0/3] nvme: NUMA locality for fabrics

[hare@suse.de (Hannes Reinecke)]

Hi all,

here's a patchset to leverage NUMA locality information for fabric controllers.
This is the second attempt for doing so; after discussion with hch we came
to the conclusion that the attempt in the initial submission with a manual
configuration would only lead to more confusion and suboptimal configuration.

So here's now a version with an automatic NUMA balancing, where we attempt
to split the number submitting CPUs/cores evenly across the available
controller.

With this patchset I'm seeing a performance increase from
262k IOPS to 344k IOPS, measured against a NetApp AF700.

As usual, comments and reviews are welcome.

Changes to v2:
- use 'numa_node' instead of 'node_id' (suggested by Sagi)
- rediff patches for better readability

Hannes Reinecke (3):
  nvme: NUMA locality information for fabrics
  nvme-multipath: Select paths based on NUMA locality
  nvme-multipath: automatic NUMA path balancing

 drivers/nvme/host/core.c      |  36 ++++++++++++-
 drivers/nvme/host/fc.c        |   5 +-
 drivers/nvme/host/multipath.c | 119 +++++++++++++++++++++++++++++++++++++++++-
 drivers/nvme/host/nvme.h      |   3 ++
 drivers/nvme/host/rdma.c      |   6 ++-
 5 files changed, 161 insertions(+), 8 deletions(-)

-- 
2.16.4