Re: [RFC 0/3] reduce CPU usage on exit for IOPOLL

Jens Axboe
2020-07-07T19:00:39Z

On 7/7/20 7:36 AM, Pavel Begunkov wrote:
> [1,2] are small preps for the future that should change
> nothing functionally.
>
> [3] helps to reduce CPU usage on exit. We don't care about latency
> and CQEs when io_uring is going away, so checking it every HZ/20
> should be enough
> Please, check the assumptions, because I hope that nobody expects
> ->iopoll() to do real work but not just completing.

I think it's fine to do it in 1/20th second intervals, if you exit
with pending poll requests.

Hence it looks good to me, I've applied it.

--
Jens Axboe