Hacker News with Generative AI: x86_64

When eBPF pt_regs reads return garbage on the latest Linux kernels, blame Fred (tanelpoder.com)
TLDR; Starting from Linux kernel version 6.9 on x86_64, there’s a new config option CONFIG_X86_FRED enabled and it adds 16 bytes to the bottom of a task’s kernel stack area, so you’ll need to account for this extra padding in your “raw” kernel stack & pt_regs lookup code.
Linus Torvalds Comes Out Against "Completely Broken" x86_64 Feature Levels (phoronix.com)
Linux 6.13 KVM Eliminates an "Awful Idea", Many x86_64 Improvements (phoronix.com)
The KVM changes were merged yesterday for Linux 6.13 in further enhancing the open-source virtualization stack.
x86 and x86_64 software optimization resources (agner.org)