![]() ![]() Warn once about it, and let the crazy people say “I’d rather take a 50% performance hit than worry about a theoretical issue”. I think we should use the same logic as for L1TF: we default to something that doesn’t kill performance. So why do that STIBP slow-down by default when the people who *really* care already disabled SMT? ![]() It’s apparently better to just disable SMT entirely, which is what security-conscious people do anyway. Linux kernel release 4.x < The kernel’s command-line parameters Linux allocated devices (4.x+ version) L1TF - L1 Terminal Fault Reporting bugs Security bugs Bug hunting Bisecting a bug Tainted kernels Ramoops oops/panic logger Dynamic debug Explaining the dreaded No init found. Run the following commands in terminal to install Linux Kernel 4.20 in 64 Bit Ubuntu Linux Systems: sudo apt-get upgrade sudo apt-get update cd /tmp/ wget -c wget -c. When performance goes down by 50% on some loads, people need to start asking themselves whether it was worth it. This was marked for stable, and honestly, nowhere in the discussion did I see any mention of just *how* bad the performance impact of this was. Linus Torvalds was surprised by the fact that he said on the mailing list that he did not see any words that would affect performance in the discussion list. When performance drops by 50% under certain loads, you should first ask if it is worthwhile, not regardless. ![]() The main change in 4.20 is that STIBP is enabled by default for Intel-supported Hyper-Threading processors to prevent cross-thread control of indirect branch predictors. Please note that improvements to the documentation are welcome join the. Linus Torvalds announced: Let’s face it, last week wasn’t quite as quiet as I would have hoped for, but there really doesn’t seem to be any point to delay 4.20 because everybody is already taking a break. Kernel documentation, like the kernel itself, is very much a work in progress that is especially true as we work to integrate our many scattered documents into a coherent whole. Linux Kernel 4.20 was released a few days ago. Phoronix recently found that on almost all low-end, high-end Intel processors, the latest beta kernel, Linux Kernel 4.20, has a significant performance degradation over the latest stable version 4.19, while AMD’s processors are not affected. The reason for the performance degradation is related to Intel processor vulnerability patching. Download Linux Kernel 4 - Linux Kernel 4 4.20.13, Linux is a clone of the operating system Unix, written from scratch by Linus Torvalds with assistance from. This is the top level of the kernel’s documentation tree. ![]()
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