On Thu, Aug 26, 2021, at 2:26 PM, David Hildenbrand wrote: > On 26.08.21 19:05, Andy Lutomirski wrote: > > Oof. That's quite a requirement. What's the point of the VMA once all > > this is done? > > You can keep using things like mbind(), madvise(), ... and the GUP code > with a special flag might mostly just do what you want. You won't have > to reinvent too many wheels on the page fault logic side at least. > You can keep calling the functions. The implementations working is a different story: you can't just unmap (pte_numa-style or otherwise) a private guest page to quiesce it, move it with memcpy(), and then fault it back in. In any event, adding fd-based NUMA APIs would be quite nice. Look at the numactl command.
