Re: [PATCH] io_uring: wakeup threads waiting for EPOLLOUT events

[Jens Axboe]

On 1/16/20 6:49 AM, Stefano Garzarella wrote:
> io_uring_poll() sets EPOLLOUT flag if there is space in the
> SQ ring, then we should wakeup threads waiting for EPOLLOUT
> events when we expose the new SQ head to the userspace.
> 
> Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
> ---
> 
> Do you think is better to change the name of 'cq_wait' and 'cq_fasync'?

I honestly think it'd be better to have separate waits for in/out poll,
the below patch will introduce some unfortunate cacheline traffic
between the submitter and completer side.

-- 
Jens Axboe