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John Carmack's arguments against building a custom XR OS at Meta

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521 points OlympicMarmoto | 1 comments | 29 Aug 25 16:45 UTC | HN request time: 0.237s | source
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armchairhacker ◴[29 Aug 25 17:37 UTC] No.45067092[source]▶
What would be the real advantage of a custom OS over a Linux distribution?

The OS does process scheduling, program management, etc. Ok, you don’t want a VR headset to run certain things slowly or crash. But some Linux distributions are battle-tested and stable, and fast, so can’t you write ordinary programs that are fast and reliable (e.g. the camera movement and passthrough use RTLinux and have a failsafe that has been formally verified or extensively tested) and that’s enough?

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1. sulam ◴[30 Aug 25 08:15 UTC] No.45072878[source]▶
I stated this elsewhere, but at least six years ago a major justification was a better security model. At least that’s what Michael Abrash told me when I asked.