diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-12-07 03:53:30 +0000 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-12-07 06:47:13 -0700 |
| commit | e6aeb2721d3bad8379c43644d0380908e93b0187 (patch) | |
| tree | 82f98f25d70cf4e3e8781fdfdc493d5810810cf2 /io_uring | |
| parent | 1b346e4aa8e79227391ffd6b7c6ee5acf0fa8bfc (diff) | |
| download | linux-e6aeb2721d3bad8379c43644d0380908e93b0187.tar.bz2 | |
io_uring: complete all requests in task context
This patch adds ctx->task_complete flag. If set, we'll complete all
requests in the context of the original task. Note, this extends to
completion CQE posting only but not io_kiocb cleanup / free, e.g. io-wq
may free the requests in the free calllback. This flag will be used
later for optimisations purposes.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/21ece72953f76bb2e77659a72a14326227ab6460.1670384893.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 | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c index ba5ef1e675c1..13d56472dd49 100644 --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -921,8 +921,11 @@ static void __io_req_complete_post(struct io_kiocb *req) void io_req_complete_post(struct io_kiocb *req, unsigned issue_flags) { - if (!(issue_flags & IO_URING_F_UNLOCKED) || - !(req->ctx->flags & IORING_SETUP_IOPOLL)) { + if (req->ctx->task_complete && (issue_flags & IO_URING_F_IOWQ)) { + req->io_task_work.func = io_req_task_complete; + io_req_task_work_add(req); + } else if (!(issue_flags & IO_URING_F_UNLOCKED) || + !(req->ctx->flags & IORING_SETUP_IOPOLL)) { __io_req_complete_post(req); } else { struct io_ring_ctx *ctx = req->ctx; @@ -1830,7 +1833,7 @@ void io_wq_submit_work(struct io_wq_work *work) { struct io_kiocb *req = container_of(work, struct io_kiocb, work); const struct io_op_def *def = &io_op_defs[req->opcode]; - unsigned int issue_flags = IO_URING_F_UNLOCKED; + unsigned int issue_flags = IO_URING_F_UNLOCKED | IO_URING_F_IOWQ; bool needs_poll = false; int ret = 0, err = -ECANCELED; @@ -3490,6 +3493,11 @@ static __cold int io_uring_create(unsigned entries, struct io_uring_params *p, if (!ctx) return -ENOMEM; + if ((ctx->flags & IORING_SETUP_DEFER_TASKRUN) && + !(ctx->flags & IORING_SETUP_IOPOLL) && + !(ctx->flags & IORING_SETUP_SQPOLL)) + ctx->task_complete = true; + /* * When SETUP_IOPOLL and SETUP_SQPOLL are both enabled, user * space applications don't need to do io completion events |