My point was that very few need more than 48 bits of virtual address space. Havi...

		vardump on Sept 20, 2019 \| parent \| context \| favorite \| on: Common Systems Programming Optimizations and Trick... My point was that very few need more than 48 bits of virtual address space. Having extra layer of lookup will reduce page walk performance. 52-bit physical & 57-bit virtual address space is a no brainer if you have more than 128 TB of RAM installed, of course. :-)