Re: [PATCH 1/1] x86_64: add config options to optimize for newer AMDprocessors

From: Borislav Petkov
Date: Sun Sep 29 2013 - 14:01:30 EST

On Sun, Sep 29, 2013 at 01:54:00PM -0400, Austin S Hemmelgarn wrote:
> From: Austin S. Hemmelgarn <ahferroin7@xxxxxxxxx>
> This patch adds Kconfig options to allow optimization for AMD family
> 10h, AMD Bulldozer, and AMD Piledriver derived CPU's in version
> 3.12-rc2. These provide noticeable improvements over the K8 config
> option, and allow the kernel to take full advantage of AMD specific
> instruction set extensions, such as ABM, LZCNT, and POPCNT.

A patch like that keeps popping up every couple of months. Please show
us those noticeable improvements because the guy last time failed to do

And also, keep in mind that distro kernels are built with
CONFIG_GENERIC_CPU so CPU-specific kernels are used only by the small
percentage of people who actually do build their own kernels.



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