[PATCHv8 0/6] write hints for nvme fdp

[Keith Busch <kbusch@meta.com>]

From: Keith Busch <kbusch@kernel.org>

Changes from v7:

  Limits io_uring per-io hints to raw block, and only if the block
  device registers a new queue limit indicating support for it.

  The per-io hints are opaque to the kernel.

  Minor changelog and code organization changes.

  I don't really understand the io_uring suggestions, so I just made the
  write_hint a first class field without the "meta" indirection. It's
  kind of like ioprio, which has it's own field too. Actually, might be
  neat if we could use ioprio since it already has a "hints" field that
  is currently only used by command duration limits.

Kanchan Joshi (3):
  block, fs: restore kiocb based write hint processing
  io_uring: enable per-io hinting capability
  nvme: enable FDP support

Keith Busch (3):
  block: use generic u16 for write hints
  block: introduce max_write_hints queue limit
  fs: introduce per-io hint support flag

 Documentation/ABI/stable/sysfs-block |  7 +++
 block/blk-settings.c                 |  3 +
 block/blk-sysfs.c                    |  3 +
 block/fops.c                         | 10 ++--
 drivers/nvme/host/core.c             | 82 ++++++++++++++++++++++++++++
 drivers/nvme/host/nvme.h             |  5 ++
 fs/aio.c                             |  1 +
 fs/cachefiles/io.c                   |  1 +
 fs/direct-io.c                       |  2 +-
 fs/iomap/direct-io.c                 |  2 +-
 include/linux/blk-mq.h               |  3 +-
 include/linux/blk_types.h            |  2 +-
 include/linux/blkdev.h               | 12 ++++
 include/linux/fs.h                   | 10 ++++
 include/linux/nvme.h                 | 19 +++++++
 include/uapi/linux/io_uring.h        |  4 ++
 io_uring/rw.c                        | 10 +++-
 17 files changed, 166 insertions(+), 10 deletions(-)

-- 
2.43.5