[PATCH 0/4] overflow completion enhancements

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

Sligtly improve overflow CQE handling. First two patches are just
preps. For DEFER_TASKRUN patch 3 minimises the critical section,
moves allocations out of it, and eliminates GFP_ATOMIC. And as
a follow up to a recent review, Patch 4 adds a lockdep assertion
against overflow posting abuse.

Pavel Begunkov (4):
  io_uring: open code io_req_cqe_overflow()
  io_uring: move locking inside overflow posting
  io_uring: alloc overflow entry before locking
  io_uring: add lockdep warning for overflow posting

 io_uring/io_uring.c | 90 ++++++++++++++++++++++++++-------------------
 1 file changed, 53 insertions(+), 37 deletions(-)

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2.49.0