Metadata integrity, single segment and peer-to-peer

[Keith Busch]

On Mon, Oct 20, 2025 at 02:50:04PM +0300, Leon Romanovsky wrote:
> Hi Keith,
> 
> I'm looking on the nvme_pci_setup_meta_mptr() implementation [1] and
> don't see is_pci_p2pdma_page() which exists in
> nvme_pci_setup_data_simple() [2]. Is it intentionally? Can single
> segment be p2p transfer?

We may be calling unnecessarily dma_unmap_page in that case for mptr,
but I think that still works anyway.