Re: [PATCH v2 00/10] Copy Offload in NVMe Fabrics with P2P PCI Memory

[Logan Gunthorpe]

On 01/03/18 02:03 PM, Benjamin Herrenschmidt wrote:
> However, what happens if anything calls page_address() on them ? Some
> DMA ops do that for example, or some devices might ...

Although we could probably work around it with some pain, we rely on 
page_address() and virt_to_phys(), etc to work on these pages. So on 
x86, yes, it makes it into the linear mapping.

Logan