new DMA API conversion for nvme-pci v3

[Chaitanya Kulkarni]

On 6/25/25 04:34, Christoph Hellwig wrote:
> Hi all,
>
> this series converts the nvme-pci driver to the new IOVA-based DMA API
> for the data path.
>
> Chances since v2:
>   - fix handling of sgl_threshold=0
>
> Chances since v1:
>   - minor cleanups to the block dma mapping helpers
>   - fix the metadata SGL supported check for bisectability
>   - fix SGL threshold check
>   - fix/simplify metadata SGL force checks

I was able to finish the testing of this series.
I don't see any obvious issues so far, looks good.

I've also collected the multiple sets of the performance numbers
for different block sizes using io_uring and libaio ioengines with fio
and don't see any significant performance difference on the setup I've.

If you want I can share the whole log but don't want to spam the list.

Tested-by: Chaitanya Kulkarni <kch at nvidia.com>
Reviewed-by: Chaitanya Kulkarni <kch at nvidia.com>

-ck