Post Syndicated from original https://lwn.net/Articles/908026/

Nobody should need more memory than a 64-bit pointer can address — or so
developers tend to think. The range covered by a pointer of that size
seems to be nearly infinite. During the Kernel Summit track at the 2022 Linux Plumbers Conference, Matthew
Wilcox took the stage to make the point that 64 bits may turn out to
be too few — and sooner than we think. It is not too early to start
planning for 128-bit Linux systems, which he termed “ZettaLinux”, and we
don’t want to find ourselves wishing we’d started sooner.