diff options
| author | Breno Leitao <leitao@debian.org> | 2023-01-12 06:44:11 -0800 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-01-29 15:17:41 -0700 |
| commit | f30bd4d03824fb437bf080c2b2f926cfee3f09d0 (patch) | |
| tree | 15a2881e392b0fec4f7a217aff51864b70e42ddb /io_uring/rw.c | |
| parent | a7dd27828b00be8c0c7520c53baf0b360f4d8bea (diff) | |
| download | linux-f30bd4d03824fb437bf080c2b2f926cfee3f09d0.tar.gz | |
io_uring: Split io_issue_def struct
This patch removes some "cold" fields from `struct io_issue_def`.
The plan is to keep only highly used fields into `struct io_issue_def`, so,
it may be hot in the cache. The hot fields are basically all the bitfields
and the callback functions for .issue and .prep.
The other less frequently used fields are now located in a secondary and
cold struct, called `io_cold_def`.
This is the size for the structs:
Before: io_issue_def = 56 bytes
After: io_issue_def = 24 bytes; io_cold_def = 40 bytes
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/20230112144411.2624698-2-leitao@debian.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/rw.c')
| -rw-r--r-- | io_uring/rw.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/io_uring/rw.c b/io_uring/rw.c index 02e710e771450..efe6bfda9ca9d 100644 --- a/io_uring/rw.c +++ b/io_uring/rw.c @@ -516,7 +516,7 @@ static void io_req_map_rw(struct io_kiocb *req, const struct iovec *iovec, static int io_setup_async_rw(struct io_kiocb *req, const struct iovec *iovec, struct io_rw_state *s, bool force) { - if (!force && !io_issue_defs[req->opcode].prep_async) + if (!force && !io_cold_defs[req->opcode].prep_async) return 0; if (!req_has_async_data(req)) { struct io_async_rw *iorw; |