[PATCH 00/11] remove aux CQE caches

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

Patch 1 is a fix.

Patches 2-7 are cleanups mainly dealing with issue_flags conversions,
misundertsandings of the flags and of the tw state. It'd be great to have
even without even w/o the rest.

8-11 mandate ctx locking for task_work and finally removes the CQE
caches, instead we post directly into the CQ. Note that the cache is
used by multishot auxiliary completions.

The nvme cmd change is tested with io_uring_passthrough.c, however
it doesn't seem there is anything in liburing exercising ublk paths.
How do we test it? It'd be great to have at least some basic tests
for it.

Pavel Begunkov (11):
  io_uring: fix poll_remove stalled req completion
  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
  ublk: don't hard code IO_URING_F_UNLOCKED
  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

 drivers/block/ublk_drv.c       |  18 ++---
 drivers/nvme/host/ioctl.c      |   9 ++-
 include/linux/io_uring/cmd.h   |  24 ++++++
 include/linux/io_uring_types.h |   5 +-
 io_uring/io_uring.c            | 132 +++++++++------------------------
 io_uring/io_uring.h            |   8 +-
 io_uring/net.c                 |   6 +-
 io_uring/poll.c                |   7 +-
 io_uring/rw.c                  |  18 +----
 io_uring/timeout.c             |   8 +-
 io_uring/uring_cmd.c           |  14 ++--
 io_uring/waitid.c              |   2 +-
 12 files changed, 95 insertions(+), 156 deletions(-)

-- 
2.43.0