Re: [RFC 0/8] Copy Offload with Peer-to-Peer PCI Memory

From: Logan Gunthorpe
Date: Sun Apr 16 2017 - 00:46:46 EST




On 15/04/17 09:01 PM, Benjamin Herrenschmidt wrote:
> Are ZONE_DEVICE pages identifiable based on the struct page alone ? (a
> flag ?)

Well you can't use ZONE_DEVICE as an indicator. They may be regular RAM,
(eg. pmem). It would need a separate flag indicating it is backed by iomem.

Logan