[PATCH v8 0/2] nvme-tcp: allow setting per-queue io_cpu through sysfs

[Saravanan D]

On hosts that partition their CPUs after connect time, the connect
time io_cpu selection can place a queue's socket work on CPUs owned by
another workload. This series lets a control plane set each queue's
io_cpu through /sys/class/nvme/nvmeX/queues/<qid>/. Patch 1 adds the
core helpers, patch 2 the nvme-tcp attributes.

Changes since v7 [1]:
- nvme_add_queue_info() now calls kobject_del() when
  sysfs_create_groups() fails, so the failed queue's <qid> directory
  is removed before the error returns (Sashiko, Daniel).
- Rebased onto the current nvme-7.4.

The blktests patch covering the interface follows in this thread. It
is now nvme/081, since other pending blktests patches use nvme/076 to
nvme/080.

[1] https://lore.kernel.org/linux-nvme/cover.1793800758.git.saravanand@crusoe.ai/

Saravanan D (2):
  nvme: add per-queue sysfs directories
  nvme-tcp: allow setting per-queue io_cpu through sysfs

 Documentation/ABI/stable/sysfs-nvme |  31 ++++++
 drivers/nvme/host/core.c            |  12 ++
 drivers/nvme/host/nvme.h            |  25 +++++
 drivers/nvme/host/sysfs.c           |  90 +++++++++++++++
 drivers/nvme/host/tcp.c             | 167 ++++++++++++++++++++++++----
 5 files changed, 305 insertions(+), 20 deletions(-)


base-commit: 687f3014afcd5826fa3d8f40b445f647b5a379b6
-- 
2.56.0