Regarding remap_pfn_page

[mindentropy]

>do you see any performance implication of scatter-gather?
Not much. In fact its make life easier. I am worried about dma's not 
supporting scatter gather and would want to have pretty good performance.

> Just curious to know what sort of device it is targeting 16GB/s?
Not that it would saturate pcie but would come close. Its a high end 
framegrabber for scientific purposes.