From owner-freebsd-stable  Wed Mar  7  1:11:21 2001
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Date: Wed, 07 Mar 2001 09:09:36 +0000
From: Antony T Curtis <antony@abacus.co.uk>
Organization: Abacus Polar PLC (UK)
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To: Kris Kennaway <kris@obsecurity.org>
Cc: "Hartmann, O." <ohartman@klima.physik.uni-mainz.de>,
	freebsd-stable@FreeBSD.ORG
Subject: Re: ARCH flag in new make.conf
References: <Pine.BSF.4.33.0103070915530.17134-100000@klima.physik.uni-mainz.de> <20010307010024.A98154@mollari.cthul.hu>
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Kris Kennaway wrote:
> 
> On Wed, Mar 07, 2001 at 09:30:33AM +0100, Hartmann, O. wrote:
> > Dear Sirs.
> >
> > I'm really confused and surprised by the fact, that with the upcoming new
> > FreeBSD 4.3 in its make.conf we can choose architectural parameters for the
> > CPU architecture. And I will tell you why.

<snip>

> I've been running NIS on FreeBSD with world and kernel compiled with
> -march=pentiumpro for about 9 months with no ill effects.  In fact
> I've never heard of reports of bad code generation using the -march
> settings -- it appears to be very stable.  Are you sure you didn't
> have a nonstandard optimization setting (-O2, etc) as well?

I have world compiled with -O2 with no ill effect (that I have noticed)
but if I compile the kernel with -O2, it looks okay but has problems
with talking TCP/IP - seems to generate faulty checksums and some other
quirks.... To put it simply, stable kernels are only with -O (in my
experience)

(however, I have compiled KLDs with -O2 with no ill effect)

-- 
ANTONY T CURTIS                     Tel: +44 (1635) 36222
Abacus Polar Holdings Ltd           Fax: +44 (1635) 38670
> 
Endless Loop: n., see Loop, Endless.
> 
Loop, Endless: n., see Endless Loop.
> 
		-- Random Shack Data Processing Dictionary

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