Re: [PATCH] io_uring: flush overflowed CQ events in the io_uring_poll()

[Jens Axboe <axboe@kernel.dk>]

On 2/7/20 5:18 AM, Stefano Garzarella wrote:
> In io_uring_poll() we must flush overflowed CQ events before to
> check if there are CQ events available, to avoid missing events.
> 
> We call the io_cqring_events() that checks and flushes any overflow
> and returns the number of CQ events available.
> 
> We can avoid taking the 'uring_lock' since the flush is already
> protected by 'completion_lock'.

Thanks, applied. I dropped that last sentence, as a) it doesn't
really matter, and b) we may very well already have it held here
if someone is doing a poll on the io_uring fd itself.

-- 
Jens Axboe