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Patch Proposed For Adding x86_64 Feature Levels To The Kernel - But It's Likely D.O.A.
A patch was sent out on Sunday for adding new Linux kernel configuration options for tuning the kernel build to different x86_64 micro-architecture feature levels
adds the x86_64 micro-architecture feature levels v2 / v3 / v4 as new Kconfig options if wanting to cater to them when building the kernel with modern GCC and LLVM Clang compilers. While the x86_64 micro-architecture feature level use can make a great deal better performance for compiling application code, for the Linux kernel the benefits are likely much less. So as it stands now, it's looking like this proposed patch doesn't have enough justification or interest from upstream kernel developers to make it mainline.
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