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| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-06-20 01:25:53 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-07-24 18:39:14 -0600 |
| commit | ba3cdb6fbb6e8eb525c868c60e103c5711edc068 (patch) | |
| tree | 884b7152b56ddc722a24d9c74c4c25d2492ba711 /io_uring/timeout.c | |
| parent | affa87db90108d9f017f927bcdab536e32c3915e (diff) | |
| download | linux-ba3cdb6fbb6e8eb525c868c60e103c5711edc068.tar.gz | |
io_uring: improve task exit timeout cancellations
Don't spin trying to cancel timeouts that are reachable but not
cancellable, e.g. already executing.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/ab8a7440a60bbdf69ae514f672ad050e43dd1b03.1655684496.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/timeout.c')
| -rw-r--r-- | io_uring/timeout.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/io_uring/timeout.c b/io_uring/timeout.c index 557c637af158b..a79a7d6ef1b37 100644 --- a/io_uring/timeout.c +++ b/io_uring/timeout.c @@ -49,7 +49,7 @@ static inline void io_put_req(struct io_kiocb *req) } } -static void io_kill_timeout(struct io_kiocb *req, int status) +static bool io_kill_timeout(struct io_kiocb *req, int status) __must_hold(&req->ctx->completion_lock) __must_hold(&req->ctx->timeout_lock) { @@ -64,7 +64,9 @@ static void io_kill_timeout(struct io_kiocb *req, int status) atomic_read(&req->ctx->cq_timeouts) + 1); list_del_init(&timeout->list); io_req_tw_post_queue(req, status, 0); + return true; } + return false; } __cold void io_flush_timeouts(struct io_ring_ctx *ctx) @@ -620,10 +622,9 @@ __cold bool io_kill_timeouts(struct io_ring_ctx *ctx, struct task_struct *tsk, list_for_each_entry_safe(timeout, tmp, &ctx->timeout_list, list) { struct io_kiocb *req = cmd_to_io_kiocb(timeout); - if (io_match_task(req, tsk, cancel_all)) { - io_kill_timeout(req, -ECANCELED); + if (io_match_task(req, tsk, cancel_all) && + io_kill_timeout(req, -ECANCELED)) canceled++; - } } spin_unlock_irq(&ctx->timeout_lock); io_commit_cqring(ctx); |