io_uring: save ctx put/get for task_work submit

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Do a little trick in io_ring_ctx_free() briefly taking uring_lock, that
will wait for everyone currently holding it, so we can skip pinning ctx
with ctx->refs for __io_req_task_submit(), which is executed and loses
its refs/reqs while holding the lock.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

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Pavel Begunkov 2021-02-12 03:23:54 +00:00 • committed by Jens Axboe

parent 921b9054e0

commit 04fc6c802d

1 changed files with 12 additions and 5 deletions

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fs/io_uring.c

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