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New Linux Patches Propose Removing Support For Old i486 & Early i586 CPUs (www.phoronix.com)

submitted 4 days ago* (last edited 4 days ago) by Alphane_Moon@lemmy.world to c/linux@lemmy.world

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[–] Alphane_Moon@lemmy.world 14 points 4 days ago* (last edited 4 days ago) (18 children)

The patch series today though would end support for original i486 processors as well as early i586 processors. The kernel patches would remove support for CPUs lacking TSC and CX8/CMPXCHG8B capabilities. Basically this would put the minimum upstream Linux kernel support for 32-bit processors at the original Pentium CPU with CMPXCHG8B and Time Stamp Counter (TSC) support.

There were 586 CPUs that were not Pentiums? Article implies the original Pentium would be the new baseline, but then what 586 CPUs would lose support?

[–] sprite0@sh.itjust.works 13 points 4 days ago* (last edited 4 days ago) (5 children)

i very vaguely recall cyrix having a 586 but i can't recall if it was drop in compatible or not - their chips were always bootleg quality as i remember it

[–] Alphane_Moon@lemmy.world 5 points 4 days ago (4 children)

Crazy to think that the concept of "bootleg quality" was even possible for a CPU.

[–] sprite0@sh.itjust.works 6 points 4 days ago* (last edited 4 days ago) (1 children)

i have no idea how they were viewed to the world at large; i was a teenager when these were released. I know the vibe at the time though was these were budget chips that you got if you couldn't afford intel chips, and the cost discount came with a performance hit it wasn't an AMD situation.

i'm pretty sure i ran a cyrix chip at some point although i think it was a likely a 486 clone until i could afford a proper discount intel chip; the celeron

[–] Alphane_Moon@lemmy.world 3 points 4 days ago

I think your description of "bootleg CPUs" is spot on. I was even younger (pre-teen) than you in those days. Some of my first computing experiences were on a 486 running Windows 3.1 in 95 or so. I was waiting for my mother to finish work and I was allowed to mess around on the receptionist's computer.

I am just thinking it would be crazy to have say a bootleg Ryzen (or even Snapdragon) in our time.

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