On Wed, Jan 30, 2019 at 06:48:47PM +0100, Michal Hocko wrote: > Hi, > I would like to propose the following topic for the MM track. Different > group of people would like to use NVIDMMs as a low cost & slower memory > which is presented to the system as a NUMA node. We do have a NUMA API > but it doesn't really fit to "balance the memory between nodes" needs. > People would like to have hot pages in the regular RAM while cold pages > might be at lower speed NUMA nodes. We do have NUMA balancing for > promotion path but there is notIhing for the other direction. Can we > start considering memory reclaim to move pages to more distant and idle > NUMA nodes rather than reclaim them? There are certainly details that > will get quite complicated but I guess it is time to start discussing > this at least. Yes, thanks for the proposal. I would be very interested in this discussion for MM. I think some of the details for determining such a migration path are related to the heterogeneous memory attributes I'm currently trying to export.
