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by js2 2783 days ago
Solaris 8 briefly had a kernel bug such that usleep() didn't sleep at all. I don't recall the details, just that after patching the system and rebooting things were behaving very bizarrely. I eventually realised the sleep command was returning instantly and from that tracked it to the system call, and then found a patch for the issue. Google is failing me in digging up any details. It would've been in the 2000-2004 time frame.
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EDIT: Oy, TFA is from 2004. Never mind my comment about Solaris 8 being ancient.