[PATCH v3 00/13] Remove aux CQE caches

[Pavel Begunkov <asml.silence@gmail.com>]

Mandate ctx locking for task_work. Then, remove aux CQE caches mostly
used by multishot requests and post them directly into the CQ.

It's leaving some of the pre existing issue_flags and state conversion
non conformant chunks, which will need to clean up later.

v3: pass IO_URING_F_COMPLETE_DEFER to the cmd cancellation path
    drop patch moving request cancellation list removal to tw 
    drop all other ublk changes

v2: Add Patch 3, which fixes deadlock due to nested locking
    introduced in v1
    Remove a fix, which was taken separately
    Pile up more cleanups (Patches 12-14)

Pavel Begunkov (13):
  io_uring/cmd: move io_uring_try_cancel_uring_cmd()
  io_uring/cmd: kill one issue_flags to tw conversion
  io_uring/cmd: fix tw <-> issue_flags conversion
  io_uring/cmd: introduce io_uring_cmd_complete
  nvme/io_uring: don't hard code IO_URING_F_UNLOCKED
  io_uring/rw: avoid punting to io-wq directly
  io_uring: force tw ctx locking
  io_uring: remove struct io_tw_state::locked
  io_uring: refactor io_fill_cqe_req_aux
  io_uring: get rid of intermediate aux cqe caches
  io_uring: remove current check from complete_post
  io_uring: refactor io_req_complete_post()
  io_uring: clean up io_lockdep_assert_cq_locked

 drivers/nvme/host/ioctl.c      |   9 +-
 include/linux/io_uring/cmd.h   |  28 +++++
 include/linux/io_uring_types.h |   5 +-
 io_uring/io_uring.c            | 198 ++++++++-------------------------
 io_uring/io_uring.h            |  24 ++--
 io_uring/net.c                 |   6 +-
 io_uring/poll.c                |   3 +-
 io_uring/rw.c                  |  18 +--
 io_uring/timeout.c             |   8 +-
 io_uring/uring_cmd.c           |  45 +++++++-
 io_uring/uring_cmd.h           |   3 +
 io_uring/waitid.c              |   2 +-
 12 files changed, 143 insertions(+), 206 deletions(-)

-- 
2.44.0