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| author | Jens Axboe <axboe@kernel.dk> | 2024-01-28 20:08:24 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-06-19 15:28:44 +0200 |
| commit | 90e11232a62bbd85e18c579c4b6b24030aa23d63 (patch) | |
| tree | f9125d46445b471958cb59ed0fc676cef1eafc6b /io_uring/io_uring.c | |
| parent | 4fa7831cf0ac71a0a345369d1a6084f2b096e55e (diff) | |
| download | linux-90e11232a62bbd85e18c579c4b6b24030aa23d63.tar.gz linux-90e11232a62bbd85e18c579c4b6b24030aa23d63.tar.bz2 linux-90e11232a62bbd85e18c579c4b6b24030aa23d63.zip | |
io_uring: add io_file_can_poll() helper
Commit 95041b93e90a06bb613ec4bef9cd4d61570f68e4 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'io_uring/io_uring.c')
| -rw-r--r-- | io_uring/io_uring.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 43b46098279a..9c383afeaf8e 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1953,7 +1953,7 @@ fail: if (req->flags & REQ_F_FORCE_ASYNC) { bool opcode_poll = def->pollin || def->pollout; - if (opcode_poll && file_can_poll(req->file)) { + if (opcode_poll && io_file_can_poll(req)) { needs_poll = true; issue_flags |= IO_URING_F_NONBLOCK; } |