On Wed, Jan 30, 2019 at 9:48 AM Michal Hocko <mhocko@xxxxxxxxxx> 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. I would be interested in this topic too. We (Alibaba) do have some usecases with using NVDIMM as NUMA node. The node balancing (or cold/hot data migration) is one of our needs to achieve optimal performance for some workloads. I also proposed a related topic. Regards, Yang > -- > Michal Hocko > SUSE Labs >
