[PATCHSET v3 0/5] Allow non-atomic allocs for overflows

[Jens Axboe <axboe@kernel.dk>]

Hi,

Sorry for spamming this patchset today, but I do believe this is close to
final... Last one today, promise. At least it should appease some of Pavel's
concerns. Basically this patchset tries to accomplish two things:

1) Enable GFP_KERNEL alloc of the overflow entries, when possible.

2) Make the overflow side pollute the fast/common path as little as
   possible.

Also does some cleanups, like passing more appropriate and easily
readable arguments to the overflow handling, rather than need 3..5
arguments of various user_data/res/cflags/extra1/extra1 being passed
along.

Passes normal regression testing.

 include/linux/io_uring_types.h |  2 +-
 io_uring/io_uring.c            | 97 ++++++++++++++++++++++------------
 2 files changed, 63 insertions(+), 36 deletions(-)

Since v2:
- Finish conversion by adding final helpers so that each of the three
  call sites can use one of them without needing open-alloc + post.

-- 
Jens Axboe