Re: [PATCH 1/3] nvme/pci: Start request after doorbell ring

Sagi Grimberg
2017-12-25T10:12:52Z

>> But that does bring up the fact if we should always be doing the
>> nvme_process_cq(nvmeq) after IO submission. For direct/hipri IO,
>> maybe it's better to make the submission path faster and skip it?
>
> Yes, I am okay to remove the opprotunistic nvme_process_cq in the
> submission path. Even under deeply queued IO, I've not seen this provide
> any measurable benefit.

+100 for removing it. Never really understood why it gets us anything...