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This conference talk explores the challenges of maintaining 32-bit Linux support as 64-bit systems become increasingly dominant across servers, PCs, and embedded devices. Learn about the current support status for various 32-bit systems and their projected future in the Linux kernel. The presentation covers modern ARMv7/v8 hardware, older ARMv4/v5/v6 machines, and other CPU architectures, while also addressing specialized topics like MMU-less microcontrollers, highmem, 32-bit userland on 64-bit hardware, and the 2038 epochalypse problem. Gain insights into when different 32-bit systems might be phased out from kernel support as development and testing resources continue to shift toward 64-bit platforms.
