On Tue, Apr 18, 2017 at 02:11:33PM -0700, Dan Williams wrote: > > I think this opens an even bigger can of worms.. > > No, I don't think it does. You'd only shim when the target page is > backed by a device, not host memory, and you can figure this out by a > is_zone_device_page()-style lookup. The bigger can of worms is how do you meaningfully stack dma_ops. What does the p2p provider do when it detects a p2p page? Jason
