Re: [PATCH] optimizing X now that we don't support i386 CPU's on 6-CURRENT

From: Garance A Drosihn <drosih_at_rpi.edu>
Date: Sun, 17 Oct 2004 22:39:37 -0400
At 7:20 PM -0700 10/17/04, David O'Brien wrote:
>
>     ----------------------------
>     revision 1.296
>     date: 2001/01/14 10:11:10;  author: jhb;  state: Exp;  lines: +2 -2
>     Remove I386_CPU from GENERIC.  Support for the 386 seriously
>     pessimizes performance on other x86 processors.  Custom kernels
>     can still be built that will run on the 386.
>     ----------------------------
>
>I remember someone tried a few years ago after this commit to get
>FreeBSD 5-CURRENT running on an I386 and had to hack some things to
>get it work.  Since no one has reported success in doing this since
>then I'm willing to bet you dinner next time I'm in Bejing that we've
>broken running on real I386's w/o realizing it.

For what it's worth, I was also under the impression that we were
going to recommend that people running a "genuine 80386" chip should
probably stick with the 4.x-series of releases.  Even if 5.3 works on
80386 right now, I was not sure that it would continue to work for
the life of the 5.x series.

I don't know where I picked up that idea, but even if we are supporting
80386 for 5.x then I think we should be able to drop it for 6.x.

-- 
Garance Alistair Drosehn            =   gad_at_gilead.netel.rpi.edu
Senior Systems Programmer           or  gad_at_freebsd.org
Rensselaer Polytechnic Institute    or  drosih_at_rpi.edu
Received on Mon Oct 18 2004 - 00:39:44 UTC

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