io_uring: add io_file_can_poll() helper

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This adds a flag to avoid dipping dereferencing file and then f_op to
figure out if the file has a poll handler defined or not. We generally
call this at least twice for networked workloads, and if using ring
provided buffers, we do it on every buffer selection. Particularly the
latter is troublesome, as it's otherwise a very fast operation.

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

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Jens Axboe 2024-01-28 20:08:24 -07:00

parent 521223d7c2

commit 95041b93e9

6 changed files with 21 additions and 6 deletions

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3

include/linux/io_uring_types.h

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2

io_uring/io_uring.c

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12

io_uring/io_uring.h

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2

io_uring/kbuf.c

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2

io_uring/poll.c

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6

io_uring/rw.c

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