On Mon 31-10-22 09:33:49, Huang, Ying wrote: [...] > In the upstream implementation, 4 tiers are possible below DRAM. That's > enough for now. But in the long run, it may be better to define more. > 100 possible tiers below DRAM may be too extreme. I am just curious. Is any configurations with more than couple of tiers even manageable? I mean applications have been struggling even with regular NUMA systems for years and vast majority of them is largerly NUMA unaware. How are they going to configure for a more complex system when a) there is no resource access control so whatever you aim for might not be available and b) in which situations there is going to be a demand only for subset of tears (GPU memory?) ? Thanks! -- Michal Hocko SUSE Labs
