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Date: Sat, 4 Mar 2017 18:32:28 +0300
From: Slawa Olhovchenkov <slw@zxy.spb.ru>
To: "Pedro F. Giffuni" <pfg@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: Re: svn commit: r314669 - head/sys/i386/conf
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On Sat, Mar 04, 2017 at 03:04:17PM +0000, Pedro F. Giffuni wrote:

> Author: pfg
> Date: Sat Mar  4 15:04:17 2017
> New Revision: 314669
> URL: https://svnweb.freebsd.org/changeset/base/314669
> 
> Log:
>   Drop i486 from the default i386 GENERIC kernel configuration.
>   
>   80486 production was stopped by Intel on September 2007. Dropping the 486
>   configuration option from the GENERIC kernel improves performance
>   slightly.
>   
>   Removing I486_CPU is consistent at this time: we don't support any
>   processor without a FPU and the PC-98 arch, which frequently involved i486
>   CPUs, is also gone so we don't test such platforms anymore.

What is realy mean?
Some Via CPU is like i486 (by instruction set).

CPU: VIA Ezra (800.04-MHz 686-class CPU)
  Origin="CentaurHauls"  Id=0x678  Family=0x6  Model=0x7  Stepping=8
  Features=0x803035<FPU,DE,TSC,MSR,MTRR,PGE,MMX>
  AMD Features=0x80000000<3DNow!>