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| author |  Jens Axboe <axboe@kernel.dk>
| 2024-01-28 20:11:55 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk>
| 2024-02-08 13:27:06 -0700 |
| commit | 521223d7c229f83915619f888c99e952f24dc39f (patch) | |
| tree | b19885749949ac462562ebc474b8964edc85331f /io_uring/cancel.h | |
| parent | io_uring: expand main struct io_kiocb flags to 64-bits (diff) | |
| download | linux-521223d7c229f83915619f888c99e952f24dc39f.tar.gz linux-521223d7c229f83915619f888c99e952f24dc39f.tar.bz2 linux-521223d7c229f83915619f888c99e952f24dc39f.zip | |
io_uring/cancel: don't default to setting req->work.cancel_seq
Just leave it unset by default, avoiding dipping into the last
cacheline (which is otherwise untouched) for the fast path of using
poll to drive networked traffic. Add a flag that tells us if the
sequence is valid or not, and then we can defer actually assigning
the flag and sequence until someone runs cancelations.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring/cancel.h')
| -rw-r--r-- | io_uring/cancel.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/io_uring/cancel.h b/io_uring/cancel.h index c0a8e7c520b6..76b32e65c03c 100644 --- a/io_uring/cancel.h +++ b/io_uring/cancel.h @@ -25,4 +25,14 @@ void init_hash_table(struct io_hash_table *table, unsigned size); int io_sync_cancel(struct io_ring_ctx *ctx, void __user *arg); bool io_cancel_req_match(struct io_kiocb *req, struct io_cancel_data *cd); +static inline bool io_cancel_match_sequence(struct io_kiocb *req, int sequence) +{ + if ((req->flags & REQ_F_CANCEL_SEQ) && sequence == req->work.cancel_seq) + return true; + + req->flags |= REQ_F_CANCEL_SEQ; + req->work.cancel_seq = sequence; + return false; +} + #endif |