Different applications would certainly benefit from different page sizes. Use 1G pages, and boom, TLB misses and faults are just gone. But definitely not a goo

Different applications would certainly benefit from different page sizes. Use 1G pages, and boom, TLB misses and faults are just gone. But definitely not a good default choice! Any choice is a tradeoff. The larger the page size, the more physical memory is going to be wasted. On the other hand, I guess with the current NVMe hardware the effect on swap might not be too bad. 64 kB pages would mean the number of TLB misses and faults are just one sixteenth of the current status quo. Diminishing returns and all.