Stake and Rope
The Linux kernel retired support for the AMD K5 this week — a chip that failed commercially in 1996 and hasn't existed in production since the Clinton administration. The panel sits with the question of what 'we still support this' was actually doing for thirty years, and who it was doing it for. This episode takes the Linux kernel's removal of non-TSC code paths — and with them, support for the AMD K5 and several Cyrix parts — as an entry point into something much larger: the way long-lived systems accumulate maintenance debt that nobody is tracking, on behalf of users who stopped existing decades ago. The Legacy Sysadmin opens with firsthand context. He bought K5s in 1997 because they were cheap, regretted all of them, and replaced them with K6s by 1998. The chip wasn't beloved. It was a commercial failure AMD shipped because they had to ship something against the Pentium. The kernel carrying support for it until 2026 wasn't loyalty to a meaningful platform — it was inertia compounding quietly for thirty years. The DBA reframes the actual technical decision: the kernel didn't retire the K5 specifically. It decided to require the TSC — the timestamp counter — as a baseline assumption, and the K5 happened to be on the wrong side of that line. The headline says 'K5 retired.' The reality is 'we finally allowed ourselves to require a 1995 instruction.' The K5 is collateral. The cost of carrying the non-TSC fallback code for thirty years was real but distributed — a small tax on scheduling code, on timer refactors, on anyone who had to remember the K5 case — none of which appeared on a dashboard or triggered a postmortem. The Startup Founder argues the kernel team made a hard call and that engineering cultures can be built around deprecation discipline. The DBA's response is direct: Stripe is fourteen years old. Talk to me about their deprecation hygiene in twenty years. Everyone gets their K5. Source Article "AMD K5 CPUs The Latest To Be Retired With Linux's Aging & Stagnate Hardware Support" By Michael Larabel, Phoronix, May 8, 2026. https://www.phoronix.com/news/AMD-K5-CPUs [https://www.phoronix.com/news/AMD-K5-CPUs] Panel * The Legacy Sysadmin * The DBA * The Startup Founder * The Goat Farmer's Counsel
13 episodios
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