Re: [LSF/MM TOPIC][LSF/MM ATTEND] NAPI polling for block drivers

Jens Axboe
2017-01-11T15:07:43Z

On 01/11/2017 06:43 AM, Johannes Thumshirn wrote:
> Hi all,
>
> I'd like to attend LSF/MM and would like to discuss polling for block drivers.
>
> Currently there is blk-iopoll but it is neither as widely used as NAPI in the
> networking field and accoring to Sagi's findings in [1] performance with
> polling is not on par with IRQ usage.
>
> On LSF/MM I'd like to whether it is desirable to have NAPI like polling in
> more block drivers and how to overcome the currently seen performance issues.

It would be an interesting topic to discuss, as it is a shame that blk-iopoll
isn't used more widely.

--
Jens Axboe