Jens Axboe 521223d7c2 io_uring/cancel: don't default to setting req->work.cancel_seq ...

Just leave it unset by default, avoiding dipping into the last
cacheline (which is otherwise untouched) for the fast path of using
poll to drive networked traffic. Add a flag that tells us if the
sequence is valid or not, and then we can defer actually assigning
the flag and sequence until someone runs cancelations.

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

2024-02-08 13:27:06 -07:00

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