diff options
| author | Jens Axboe <axboe@kernel.dk> | 2024-01-28 20:08:24 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2024-02-08 13:27:06 -0700 |
| commit | 95041b93e90a06bb613ec4bef9cd4d61570f68e4 (patch) | |
| tree | a40378fc60c611affd5f48bfe2efa56c9c00e157 /include | |
| parent | 521223d7c229f83915619f888c99e952f24dc39f (diff) | |
io_uring: add io_file_can_poll() helper
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>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/io_uring_types.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/io_uring_types.h b/include/linux/io_uring_types.h index e19698daae1a..4ddc7b3168f3 100644 --- a/include/linux/io_uring_types.h +++ b/include/linux/io_uring_types.h @@ -464,6 +464,7 @@ enum { REQ_F_ISREG_BIT, REQ_F_POLL_NO_LAZY_BIT, REQ_F_CANCEL_SEQ_BIT, + REQ_F_CAN_POLL_BIT, /* not a real bit, just to check we're not overflowing the space */ __REQ_F_LAST_BIT, @@ -538,6 +539,8 @@ enum { REQ_F_POLL_NO_LAZY = IO_REQ_FLAG(REQ_F_POLL_NO_LAZY_BIT), /* cancel sequence is set and valid */ REQ_F_CANCEL_SEQ = IO_REQ_FLAG(REQ_F_CANCEL_SEQ_BIT), + /* file is pollable */ + REQ_F_CAN_POLL = IO_REQ_FLAG(REQ_F_CAN_POLL_BIT), }; typedef void (*io_req_tw_func_t)(struct io_kiocb *req, struct io_tw_state *ts); |