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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-10-06 21:42:33 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-10-12 16:30:56 -0600 |
| commit | 44f87745d5f24a3cdf0548bf1d84fbb7316ce229 (patch) | |
| tree | c4de76d2b6b2ab7c696c8cc31cc87b2c088e197d /io_uring/io_uring.h | |
| parent | fc86f9d3bb4904117eea70347d323fde34a47c79 (diff) | |
| download | linux-44f87745d5f24a3cdf0548bf1d84fbb7316ce229.tar.gz | |
io_uring: optimise locking for local tw with submit_wait
Running local task_work requires taking uring_lock, for submit + wait we
can try to run them right after submit while we still hold the lock and
save one lock/unlokc pair. The optimisation was implemented in the first
local tw patches but got dropped for simplicity.
Suggested-by: Dylan Yudaken <dylany@fb.com>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/281fc79d98b5d91fe4778c5137a17a2ab4693e5c.1665088876.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/io_uring.h')
| -rw-r--r-- | io_uring/io_uring.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/io_uring/io_uring.h b/io_uring/io_uring.h index 47d4cad1e9c4..ef77d2aa3172 100644 --- a/io_uring/io_uring.h +++ b/io_uring/io_uring.h @@ -275,6 +275,13 @@ static inline int io_run_task_work_ctx(struct io_ring_ctx *ctx) return ret; } +static inline int io_run_local_work_locked(struct io_ring_ctx *ctx) +{ + if (llist_empty(&ctx->work_llist)) + return 0; + return __io_run_local_work(ctx, true); +} + static inline void io_tw_lock(struct io_ring_ctx *ctx, bool *locked) { if (!*locked) { |