io_uring/sqpoll: manage task_work privately

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Decouple from task_work running, and cap the number of entries we process
at the time. If we exceed that number, push remaining entries to a retry
list that we'll process first next time.

We cap the number of entries to process at 8, which is fairly random.
We just want to get enough per-ctx batching here, while not processing
endlessly.

Since we manually run PF_IO_WORKER related task_work anyway as the task
never exits to userspace, with this we no longer need to add an actual
task_work item to the per-process list.

Signed-off-by: Jens Axboe <axboe@kernel.dk>

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This commit is contained in:

Jens Axboe 2024-02-02 10:20:05 -07:00

parent 2708af1adc

commit af5d68f889

3 changed files with 82 additions and 17 deletions

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46

io_uring/io_uring.c

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24

io_uring/io_uring.h

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29

io_uring/sqpoll.c

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