On 1/28/24 22:22, Artem Kuzin wrote: > As for possible options, for now I am thinking about two: > 1. additional config option to limit the number of page tables and > corresponding replicas
This doesn't help. Everybody runs distro kernels with the same configs with MAX_NUMNODES set to 1024. > 2. setup per-NUMA node page tables and replicas in a lazy way allocating them > on demand ... and probably shrinking them on demand too (or at least limiting their growth). You don't want to have a random long-lived process that's migrated to 50 different nodes having 50 different PGD pages when it can only use one at a time.
