io_uring: lockless task list

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With networking use cases we see contention on the spinlock used to
protect the task_list when multiple threads try and add completions at once.
Instead we can use a lockless list, and assume that the first caller to
add to the list is responsible for kicking off task work.

Signed-off-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/20220622134028.2013417-4-dylany@fb.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Dylan Yudaken 2022-06-22 06:40:23 -07:00 • committed by Jens Axboe

parent c34398a8c0

commit f88262e60b

4 changed files with 14 additions and 35 deletions

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2

include/linux/io_uring_types.h

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38

io_uring/io_uring.c

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3

io_uring/tctx.c

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6

io_uring/tctx.h

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