What happened
Linux kernel developers, led by Ingo Molnar and backed by Linus Torvalds, began removing support for the 37-year-old Intel 486 CPU. Patches for the upcoming Linux 7.1 kernel eliminate CONFIG_M486SX, CONFIG_M486, and CONFIG_MELAN Kconfig build options, preventing users from compiling i486 kernel images. Torvalds cited "zero real reason" to maintain support, calling it detrimental to development efforts, while Molnar noted the "compatibility glue" for ancient 32-bit CPUs causes problems, diverting developer time.
Why it matters
Maintaining legacy hardware support diverts engineering resources from current development. For platform engineers and kernel maintainers, this change frees up time previously spent resolving issues with outdated 32-bit CPU compatibility. The removal of 486 support in Linux 7.1 standardises the minimum hardware baseline, reducing complexity and allowing for more focused optimisation on modern architectures. Procurement teams should ensure any remaining 486-dependent systems are isolated or upgraded before the Linux 7.1 release.
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