Linus Torvalds Growing Frustrated By Buggy Hardware & Theoretical CPU Attacks

Posted by Scott_Ruecker on Oct 21, 2024 5:42 PM EDT
Phoronix; By Michael Larabel 		Mail this story
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Over the past week Linux creator Linus Torvalds has been active on a Linux kernel mailing list thread around avoiding barrier_nospec() in copy_from_user() due to being "overkill and painfully slow."

The conversation evolved into low-level discussions over CPU behavior and how to best handle, differing behavior/requirements with new Intel CPUs supporting Linear Address Masking (LAM), and the overall headaches these days around CPU security mitigations.

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