>> >> 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 > I'd also be interested in this topic. Given that iopoll only really makes sense for low-latency, low queue depth environments (i.e. down below 10-20us) I'd like to discuss which drivers we think will need/want to be upgraded (aside from NVMe ;-)). I'd also be interested in discussing how best to enable and disable polling. In the past some of us have pushed for a "big hammer" to turn polling on for a given device or HW queue [1]. I'd like to discuss this again as well as looking at other methods above and beyond the preadv2 system call and the HIPRI flag. Stephen [1] http://marc.info/?l=linux-block&m=146307410101827&w=2 > _______________________________________________ > Linux-nvme mailing list > Linux-nvme@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-nvme > > -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
