diff options
| author | Jens Axboe <axboe@kernel.dk> | 2026-04-20 14:24:50 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2026-04-21 12:19:06 -0600 |
| commit | 7faaa6812aba550c24bffdfd9399568223c8a477 (patch) | |
| tree | 541dbe26355aab846f079d20b26f22ca2ce0c9c6 | |
| parent | 79968834558774bdc5de4b5503d412df632646aa (diff) | |
io_uring/futex: ensure partial wakes are appropriately dequeued
If a FUTEX_WAITV vectored operation is only partially woken, we
should call __futex_wake_mark() on the queue to account for that.
If not, then a later wakeup will wake the same entry, rather than
the next one in line.
Fixes: 8f350194d5cfd ("io_uring: add support for vectored futex waits")
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | io_uring/futex.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/io_uring/futex.c b/io_uring/futex.c index fd503c24b428..9cc1788ef4c6 100644 --- a/io_uring/futex.c +++ b/io_uring/futex.c @@ -159,8 +159,10 @@ static void io_futex_wakev_fn(struct wake_q_head *wake_q, struct futex_q *q) struct io_kiocb *req = q->wake_data; struct io_futexv_data *ifd = req->async_data; - if (!io_futexv_claim(ifd)) + if (!io_futexv_claim(ifd)) { + __futex_wake_mark(q); return; + } if (unlikely(!__futex_wake_mark(q))) return; |