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A comment on Build your own Linux. Parent comment

Re:Build your own Linux by smitherfield on Wednesday August 16, 2017 @05:26PM (#15031515)
Didn't mean to imply that was a good idea, just that it's possible. It looks like the top supercomputers are getting close to surpassing 64 petabytes (56 bits byte-addressed) of virtual memory space, so 16-bit tags are right out. A 48-bit byte-addressed memory space is 256 terabytes, which is getting snug for high-end servers but still 15±5 years out for consumer hardware.

  48-bit byte-addressed: 256 terabytes
  48-bit word-addressed:   2 petabytes
  56-bit byte-addressed:  64 petabytes
  56-bit word-addressed: 512 petabytes
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Re:Build your own Linux by justincormack on Thursday August 17, 2017 @05:18AM (#15035036)
NVDIMMs are about to change this, addressed like memory but with around 10 times as much data, so address space is about to jump.
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