[PATCH v3 0/6] regions, param pre-mapping and reg waits extension

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

A bit late but first we need a better and more generic API for
ring/memory/region registration (see Patch 4), and it changes the API
extending registered waits to be a generic parameter passing mechanism.
That will be useful in the future to implement a more flexible rings
creation, especially when we want to share same huge page / mapping.
Patch 6 uses it for registered wait arguments, and it can also be
used to optimise parameter passing for normal io_uring requests.

A dirty liburing branch with tests:

https://github.com/isilence/liburing/tree/io-uring-region-test

v3: fix page array memleak (Patch 4)

v2: cleaned up namings and commit messages
    moved all EXT_ARG_REG related bits Patch 5 -> 6
    added alignment checks (Patch 6)

Pavel Begunkov (6):
  io_uring: fortify io_pin_pages with a warning
  io_uring: disable ENTER_EXT_ARG_REG for IOPOLL
  io_uring: temporarily disable registered waits
  io_uring: introduce concept of memory regions
  io_uring: add memory region registration
  io_uring: restore back registered wait arguments

 include/linux/io_uring_types.h | 20 +++----
 include/uapi/linux/io_uring.h  | 28 +++++++++-
 io_uring/io_uring.c            | 27 +++++-----
 io_uring/memmap.c              | 69 ++++++++++++++++++++++++
 io_uring/memmap.h              | 14 +++++
 io_uring/register.c            | 97 ++++++++++++----------------------
 io_uring/register.h            |  1 -
 7 files changed, 166 insertions(+), 90 deletions(-)

-- 
2.46.0