diff options
| author |   Pavel Begunkov <asml.silence@gmail.com> | 2022-09-08 16:56:56 +0100 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2022-09-21 13:15:01 -0600 |
| commit | 7924fdfeea814b4f7ff8a16de00951ad93cccf6c (patch) | |
| tree | f37adcaa5dcdfedaddbcce94c92c824bc64354e7 /io_uring | |
| parent | io_uring/iopoll: unify tw breaking logic (diff) | |
| download | linux-dev-7924fdfeea814b4f7ff8a16de00951ad93cccf6c.tar.xz linux-dev-7924fdfeea814b4f7ff8a16de00951ad93cccf6c.zip | |
io_uring: add fast path for io_run_local_work()
We'll grab uring_lock and call __io_run_local_work() with several
atomics inside even if there are no task works. Skip it if ->work_llist
is empty.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Dylan Yudaken <dylany@fb.com>
Link: https://lore.kernel.org/r/f6a885f372bad2d77d9cd87341b0a86a4000c0ff.1662652536.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/io_uring.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index 12e8acd30096..433466455a5f 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -1208,6 +1208,9 @@ int io_run_local_work(struct io_ring_ctx *ctx) bool locked; int ret; + if (llist_empty(&ctx->work_llist)) + return 0; + locked = mutex_trylock(&ctx->uring_lock); ret = __io_run_local_work(ctx, locked); if (locked) |