[$] The road to Zettalinux

Nobody should need more memory than a 64-bit pointer can address - or sodevelopers tend to think. The range covered by a pointer of that sizeseems to be nearly infinite. During the Kernel Summit track at the 2022 Linux Plumbers Conference, MatthewWilcox took the stage to make the point that 64 bits may turn out tobe too few - and sooner than we think. It is not too early to startplanning for 128-bit Linux systems, which he termed "ZettaLinux", and wedon't want to find ourselves wishing we'd started sooner.