in/iouring info: MIN_TIMEOUT supported: true, features: 0x3ffff info: Testing: min_wait=1000ms, timeout=5s, wait_nr=4 info: 1 cqes in 1500.3ms When the min_wait timeout triggers, reset the number of completions needed to wake the task. This should ensure that any future events will wake the task, regardless of how many events it originally wanted to wait for. Reported-by: Tip ten Brink Cc: stable@vger.kernel.org Fixes: 1100c4a2656d ("io_uring: add support for batch wait timeout") Link: https://github.com/axboe/liburing/issues/1477 Signed-off-by: Jens Axboe Signed-off-by: Greg Kroah-Hartman --- io_uring/io_uring.c | 3 +++ 1 file changed, 3 insertions(+) --- a/io_uring/io_uring.c +++ b/io_uring/io_uring.c @@ -2551,6 +2551,9 @@ static enum hrtimer_restart io_cqring_mi goto out_wake; } + /* any generated CQE posted past this time should wake us up */ + iowq->cq_tail = iowq->cq_min_tail; + hrtimer_update_function(&iowq->t, io_cqring_timer_wakeup); hrtimer_set_expires(timer, iowq->timeout); return HRTIMER_RESTART;[PATCH 6.18 230/430] io_uring: fix min_wait wakeups for SQPOLLGreg Kroah-Hartman undefinedstable@vger.kernel.org undefined undefined undefined undefinedRb